Pumping Apparatus

Question 0

Friction Loss Coefficient - Single Hoselines:

Hose diameter of 1 3/4 inch with 1 1/2 inch couplings has a “coefficient” fiction loss of:

Answer 0

15.5

Question 1

The friction loss in 100 feet of 2 1/2 inch hose flowing 200 GPM is 10 PSI. What would the friction loss in 300 feet of 2 1/2 inch hose flowing 200 GPM be?

Answer 1

30 PSI

Question 2

Friction Loss Coefficient - Single Hoselines:

Hose diameter of 2 1/2 inches has a “coefficient” friction loss of:

Answer 2

2

Question 3

Friction Loss Coefficients - Siamesed Lines of Equal Length:

Two 2 1/2 inch hoses has a “coefficient” fiction loss of:

Answer 3

0.5

Question 4

Friction Loss Coefficients - Siamesed Lines of Equal Length:

Two 3 inch hoses with 2 1/2 inch couplings has a “coefficient” fiction loss of:

Answer 4

0.2

Question 5

What is the formula to find friction loss? Equation A:

Friction loss = ( )( )sq( )

Answer 5

Friction Loss = (coefficient #) x

flow-rate in hundreds of GPM / 100)sq x (hose length in hundreds of feet / 100

Question 6

Formula to find “elevation pressure” is:

1. When # of feet is given:
2. When # of stories/floors are given:

Answer 6

EP = (0.5)(Height in feet)

Or

EP = (5psi)(# of stories - 1)

Question 7

An engine is pumping through 500 feet of 2 1/2 inch hose flowing at 300 gallons per minute and the nozzle is operating 100 feet below the pump. Friction loss combined with elevation loss would be:

Answer 7

40psi

FL=(coefficient)(flow rate / 100)sq(hose length /100)
FL=(2)(300 / 100)sq(500 / 100)
FL=(2)(3)sq(5)
FL=(2)(9)(5)
FL=90
-----------------------------------------
EP=(0.5)(100)
EP=50
-----------------------------------------
TFL = FL-EP
TFL = 90-50
TFL = 40psi

Question 8

Water exerts a pressure of 0.434 PSI per foot of elevation.

1. When a nozzle is operating at an elevation higher than the apparatus, this pressure is exerted back against the pump. To compensate for this pressure “loss”, elevation pressure must be _____ to the friction loss to determine total pressure loss.
2. Operating a nozzle lower than the pump results in pressure pushing against the nozzle. This “gain” in pressure is compensated for by _____ the elevation pressure from the total friction loss.

Answer 8

1. adding

2. subtracting

Question 9

An engine is pumping through 150 feet of 2 1/2 inch at 300 GPM and has a nozzle pressure of 50 psi.

1. The friction loss of the hose would be: (exam sts: “FL would be most nearly:”)
2. The friction loss of the hose and nozzle would be:

Answer 9

1. FL=(2)(300/1)sq(150/1)
    FL=(2)(3)sq(1.5)
    FL=(2)(9)(1.5)
    FL= 27 psi    
    (^ exam answer, didn't add NP?)

2. TFL= FL+NP
   TFL= 27+50
   TFL= 77 psi

Question 10

1. When solid stream nozzles are used on hand lines, they should be operated at _____ PSI nozzle pressure.
2. A solid stream master stream device should be operated at _____ PSI.

Answer 10

1. 50 PSI

2. 80 PSI

Question 11

In most cases, (1)_____ PSI is used as a nozzle pressure for solid stream hand lines equipped with up to 1 1/2 inch nozzles. If greater rate and volume are needed, the nozzle pressure may be raised to (2)_____ PSI without becoming unmanageable. Above this point, solid streams become increasingly difficult to handle.

Answer 11

1. 50 PSI

2. 65 PSI

Question 12

The most amount of water that can be safely flowed through a handline is:

A. 250 GPM.
B. 300 GPM.
C. 350 GPM.
D. 400 GPM.

Answer 12

C. 350 GPM

Question 13

The friction loss in 600 feet of 2 1/2 inch hose flowing at 200 GPM is most nearly:

Answer 13

FL = (2)(200/100)sq(600/100)
FL = (2)(2)sq(6)
FL = (2)(4)(6)
FL = 48 psi

Question 14

The master stream is the “big gun” of the fire department:

1. Smoothbore master streams are usually operated at _____ PSI
2. and fog master streams at _____ psi.
3. Master stream flows are usually _____ GPM or greater.

Answer 14

1. 80 PSI
2. 100 PSI
3. 350 GPM

Question 15

A hoseline is operating on the 10th floor of a high-rise building. The building is equipped with a standpipe system. What is the total pressure loss due to elevation at the base of the standpipe system?

Answer 15

EP = 5 PSI x (# of stories - 1)
EP = 5 PSI (10 - 1)
EP = 5 PSI (9)
EP = 45 PSI

Question 16

A hoseline is operating on the 12th floor of a high-rise building. The building is equipped with a standpipe system. What is the total pressure loss due to elevation at the base of the standpipe system?

Answer 16

EP = 5 PSI (# of stories - 1)
EP = 5 PSI (12 - 1)
EP = 5 PSI (11)
EP = 55 PSI

Question 17

Your pumper is operating from a hydrant. The static pressure is 90 psi, and the residual pressure is 82 PSI. You are supplying a hoseline flowing 300 GPM. Using the percentage method of calculating additional water available, what is the percentage drop in this layout?

Answer 17

Percent Drop = (Static-Residual)(100) / Static
PD = (90-82)(100) / 90
PD = (8)(100) /90
PD = 800/90
PD = ~ 9%

Question 18

Static/Residual Additional Hydrant Water:

If the percentage drop is 10% or less, _____ additional lines with the same flow as the line being used maybe added.

Answer 18

3

Question 19

Static/Residual Additional Hydrant Water:

If the percentage drop is 11%-15%, _____ additional lines with the same flow as the original line may be added.

Answer 19

2

Question 20

Static/Residual Additional Hydrant Water:

If the percentage drop is 16%-25%, _____ additional line equal to the flow of the original line may be added.

Answer 20

1

Question 21

Static/Residual Additional Hydrant Water:

If the percentage drop is over 25%, _____ additional lines with the same flow as the original line may be added.

Answer 21

Zero

-More water may be available, but not as much that is flowing through the original line being used.

Question 22

Your pumper is operating from a hydrant. The static pressure is 90 PSI, and the residual pressure is 82 PSI. You are supplying a hoseline flowing 300 GPM. Using the percentage method of calculating additional water available, how many more lines are available from this layout?

Answer 22

3 more lines

Question 23

An automatic nozzle will maintain a constant nozzle pressure of _____ PSI, no matter how much the pump discharge pressure is above this figure. As pump discharge pressure is increased, the nozzle automatically enlarges its effective opening size (within the range of the nozzle) to match the flow.

Answer 23

100 PSI

Question 24

What is the friction loss in 200 feet of 2 1/2 inch hose flowing 300 GPM?

Answer 24

``` FL=(C)(GPM/100)sq(HL/100) FL=(2)(300/100)sq(200/100) FL=(2)(3)sq(2) FL=(2)(9)(2) FL= 36 PSI ```

Question 25

The two factors affecting fog streams that are not applicable to solid streams are: A. Water velocity and water droplet friction with the air. B. Fire stream pattern, and water droplet friction with air. C. Water velocity and gravity. D. Gravity and fire stream pattern.

Answer 25

B. Fire stream pattern, and water droplet friction with air.

Question 26

Tests have revealed that there are practical working limits for velocity of fire streams. Do not operate portable master stream devices equipped with solid stream nozzles above _____ PSI.

Answer 26

80 PSI

Question 27

The heat resulting from improperly insulated or faulty electrical materials. This is particularly evident where the insulation is required to handle high-voltage or loads near maximum capacity. This statement best describes: A. Electric Heating. B. Resistance Heating. C. Leakage current heating. D. Arching.

Answer 27

C. Leakage current heating.

Question 28

Determine the friction loss in a 1 3/4 inch hose line 100 feet long, flowing 200 GPM.

Answer 28

``` FL = (C)(GPM/100)sq(HL/100) FL = (15.5)(200/1)sq(100/100) FL = (15.5)(2)sq(1) FL = (15.5)(4)(1) FL = 62 PSI ```

Question 29

Water has a number of characteristics that make it an excellent extinguishing agent. The following statements are disadvantages to using water… the exceptions: A. A relatively large amount of heat is required to change water into steam. B. Water has a high surface tension. C. Low viscosity. D. Electrical conductivity.

Answer 29

A. A relatively large amount of heat is required to change water into steam. (Advantage)

Question 30

There are some disadvantages to using water as a fire extinguishing agent. These disadvantages are due to some additional properties that water possesses. One disadvantage of water is that it has a high surface _____ : A. Viscosity B. Tension C. Reflectivity D. Opacity

Answer 30

B. Tension

Question 31

1. ) _____ feet of water column exerts 1 PSI. | 2. ) Therefore, water under pressure of 55 PSI will move water _____ feet up a standpipe.

Answer 31

1. ) 2.304 feet | 2. ) ~ 125 feet

Question 32

What is the elevation pressure required to move water up to the top of a 150 foot hill?

Answer 32

``` EP = (0.5)(feet) EP = (0.5)(150) EP = 75 PSI ```

Question 33

If 300 GPM is flowing from a nozzle on a 2 1/2 inch hose 200 feet long, the friction loss will be:

Answer 33

``` FL = (C)(GPM/100)sq(HL/100) FL = (2)(300/100)sq(200/100) FL = (2)(3)sq(2) FL = (2)(9)(2) FL = 36 PSI ```

Question 34

If 200 GPM is flowing from a nozzle, what is the total pressure loss due to friction for 100 feet of 2 1/2 inch hose?

Answer 34

``` FL = (C)(GPM/100)sq(HL/100) FL = (2)(200/100)sq(100/100) FL = (2)(2)sq(1) FL = (2)(4)(1) FL = 8 PSI ```

Question 35

1. ) The weight of one cubic foot of water is approximately _____ lbs. 2. ) Water weighs approximately _____ lbs per gallon.

Answer 35

1. ) 62.5 lbs | 2. ) 8.33 lbs

Question 36

4 Principles of Friction Loss: Which principle can be illustrated by: One hose that is 100 feet long, and another that is 200 feet long, both flowing 200 GPM. The 100 foot hose has a friction loss of 10 PSI and the 200 foot long has a friction loss twice as much, 20 PSI. A. 1st Principle: If all other conditions are the same, friction loss of varies directly with the length of the hose or pipe. B. 2nd Principle: When hoses are the same size, friction loss varies approximately with the square of the increase in the velocity of the flow. C. 3rd Principle: For the same discharge, friction loss varies inversely as the fifth power of the diameter of the hose. D. 4th Principle: For a given flow velocity, friction loss is approximately the same, regardless of the pressure on the water.

Answer 36

A. 1st Principle: If all other conditions are the same, friction loss of varies directly with the length of the hose or pipe.

Question 37

4 Principles of Friction Loss: Which principle can be illustrated by: That friction loss develops much faster than the change in velocity. A. 1st Principle: If all other conditions are the same, friction loss of varies directly with the length of the hose or pipe. B. 2nd Principle: When hoses are the same size, friction loss varies approximately with the square of the increase in the velocity of the flow. C. 3rd Principle: For the same discharge, friction loss varies inversely as the fifth power of the diameter of the hose. D. 4th Principle: For a given flow velocity, friction loss is approximately the same, regardless of the pressure on the water.

Answer 37

B. 2nd Principle: When hoses are the same size, friction loss varies approximately with the square of the increase in the velocity of the flow.

Question 38

4 Principles of Friction Loss: Which principle can be illustrated by: The advantage of larger size hose. A. 1st Principle: If all other conditions are the same, friction loss of varies directly with the length of the hose or pipe. B. 2nd Principle: When hoses are the same size, friction loss varies approximately with the square of the increase in the velocity of the flow. C. 3rd Principle: For the same discharge, friction loss varies inversely as the fifth power of the diameter of the hose. D. 4th Principle: For a given flow velocity, friction loss is approximately the same, regardless of the pressure on the water.

Answer 38

C. 3rd Principle: For the same discharge, friction loss varies inversely as the fifth power of the diameter of the hose.

Question 39

4 Principles of Friction Loss: Which principle can be illustrated by: Why friction loss is the same when hoses or pipes at different pressures flow the same amount of water. A. 1st Principle: If all other conditions are the same, friction loss of varies directly with the length of the hose or pipe. B. 2nd Principle: When hoses are the same size, friction loss varies approximately with the square of the increase in the velocity of the flow. C. 3rd Principle: For the same discharge, friction loss varies inversely as the fifth power of the diameter of the hose. D. 4th Principle: For a given flow velocity, friction loss is approximately the same, regardless of the pressure on the water.

Answer 39

D. 4th Principle: For a given flow velocity, friction loss is approximately the same, regardless of the pressure on the water.

Question 40

What is the total pressure loss due to friction in 500 feet of 2 1/2 inch hose when 400 GPM is flowing?

Answer 40

``` FL = (C)(GPM/100)sq(HL/100) FL = (2)(400/100)sq(500/100) FL = (2)(4)sq(5) FL = (2)(16)(5) FL = 160 PSI ```

Question 41

A hoseline operating on a 10th floor structure fire is connected to the building standpipe system. What is the total pressure loss due to elevation at the base of the standpipe system?

Answer 41

``` EP = (5)(stories-1) EP = (5)(10-1) EP = (5)(9) EP = 45 PSI ```

Question 42

Determine the total pressure loss in the hose assembly when a fire department pumper is supplying two 3 inch lines with 2 1/2 inch couplings, each 200 feet long. These hose lines are connected to a siamese appliance that is in turn supplying a pre-pipe elevating platform. The platform is elevated 70 feet and is discharging 1500 GPM.

Answer 42

``` FL=(c)(GPM/100)sq(HL/100)+EP+AP FL=(0.2)(15)sq(2) +EP+AP FL=(0.2)(225)(2) + (0.5)(70) + AP FL=90+35+10siamese+25applianceFL=90+35+35 FL = 160 PSI ``` (Exam's answer is 150 PSI)

Question 43

Using the percentage method, if the static pressure is 50 PSI and the residual pressure is 43 PSI how much water can be delivered?

Answer 43

``` PD=(Static-Residual)(100)/Static PD=(50-43)(100)/50 PD=(7)(100)/50 PD=700/50 PD= 14% = 2 more lines ```

Question 44

Two statewide studies on collisions involving EMS vehicles provide keen insight into the collision problem. According to these two studies, when did most collisions occur? A. While responding to emergency calls. B. Broad daylight on dry roads. C. Snow, ice, or rain conditions. D. At night time.

Answer 44

B. Broad daylight on dry roads.

Question 45

Drafting operations are required when a pumper is going to be supplied from a static water supply source such as a pond, lake, stream or cistern. The best drafting locations are all of the following; the exception is: A. Bridges over water source. B. Boat ramps adjacent to the water source. C. Banks along a river or stream. D. Large docks next to the water source.

Answer 45

C. Banks along a river or stream.

Question 46

Calculate the total pressure loss due to elevation pressure for a hoseline operating at the top of a 200 foot hill.

Answer 46

``` EP = (0.5)(200) EP = 100 PSI ```

Question 47

Calculate the total pressure loss due to elevation pressure for a hoseline operating at the top of a 300 foot hill.

Answer 47

``` EP = (0.5)(300) EP = 150 PSI ```

Question 48

A hoseline is operating on the 8th floor of twenty story building connected to the buildings standpipe system. What is the pressure loss due to elevation at the base of the standpipes system?

Answer 48

``` EP = 5(8-1) EP = 5(7) EP = 35 PSI ```

Question 49

Foam Proportioning: 4 Basic Methods: This method of proportioning foam uses the pressure energy in the stream of water to draft foam concentrate into the fire stream. This is achieved by passing the stream of water through a venturi device called an eductor, and a pickup tube from the eductor is inserted into the foam concentrate container. In-line eductors and foam nozzle eductors are examples of foam proportioners that work by this method. A. Induction. B. Injection. C. Batch mixing. D. Premixing.

Answer 49

A. Induction.

Question 50

Foam Proportioning: 4 Basic Methods: This method of proportioning foam uses an external pump or head pressure to force foam concentrate into the fire stream at the correct ratio in comparison to the flow. These systems are commonly employed in apparatus-mounted or fixed fire protection system applications. A. Induction. B. Injection. C. Batch mixing. D. Premixing.

Answer 50

B. Injection.

Question 51

Foam Proportioning: 4 Basic Methods: This is the simplest method of mixing foam concentrate in water. This occurs when the appropriate amount of foam concentrate is poured directly into a tank of water. A. Induction. B. Injection. C. Batch mixing. D. Premixing.

Answer 51

C. Batch mixing. | Exam question ^

Question 52

Foam Proportioning: 4 Basic Methods: This is one of the more commonly use methods of proportioning. With this method, premeasured portions of water and foam concentrate are mixed in a container. Typically, this method is used with portable extinguishers, wheeled-extinguishers, skid-mounted twin agent units, and vehicle mounted tank system. These systems are limited to a one-time application. A. Induction. B. Injection. C. Batch mixing. D. Premixing.

Answer 52

D. Premixing.

Question 53

Determine the total pressure loss for a fire Department pumper that is using two 3 inch hose lines with 2 1/2 inch couplings to supply an elevated master device with fixed piping 200 feet away. The elevated master stream is discharging 2000 GPM. Through a fog nozzle that is elevated 80 feet.

Answer 53

``` FL=(c)(GPM/100)sq(HL/100)+EP+AF FL=(0.2)(20)sq(2) +0.5x80+AF FL=(0.2)(400)(2) +40+25(MS) FL=160+40+25 FL=225 PSI (For Master Streams - piped "attached" or "fixed" water ways the Siamese is not calculated, in "detachable" ladder pipe the Siamese fiction loss is used.) ```

Question 54

1. Siamese connections require adding _____ PSI appliance friction loss when flowing 350GPM or more. 2. Master Stream add _____ PSI appliance pressure loss. 3. Aerial Devices using piped or fixed waterways add _____ PSI appliance loss (Siamese connection need not to be calculated when using fixed aerial devices). 4. If traditional detachable ladder pipe hose assembly are used, the friction loss with the Siamese (if used), hose, and ladder pipe must be accounted for.

Answer 54

1. 10 PSI 2. 25 PSI 3. 25 PSI 4. 25 PSI + Siamese 10 PSI (if used)

Question 55

What will be the total pressure loss due to friction when 300 GPM is being discharged from a nozzle that is attached to 100 feet of 3 inch hose? (Using condensed Q formula: Developed for fire ground operations in which friction loss can be determined for 3, 4, & 5 inch hose. Note the amount of friction loss calculated using this formula will be 20% greater than if the same situation is calculated using FL=CQsqL)

Answer 55

GPM=discharged GPM/100 FL=(GPM)sq GPM=300/100 GPM=3 FL=(3)sq FL= 9 PSI

Question 56

A pumpers supplying one line with 250 GPM flowing. The static pressure was 60 PSI, and the residual pressure reading is 54 psi. Determine how many additional lines may be added.

Answer 56

``` PD = (static-residual)(100)/static PD = (60-54)(100)/60 PD = 600/60 PD = 10% - 3 more additional lines ```

Question 57

Class A foam concentrates are mixed in proportioner's of 0.1% to 3%; However, most commonly used concentrates are mixed in proportioners of 0.2% to 1%. When used in the ratio of 0.5% to 1%, this concentration would be used for: A. Enclosed spaces such as coal mines or basements with standard foam nozzles. B. On liquid hydrocarbon fires with standard foam nozzles. C. Exposure protection with standard fog nozzles. D. Polar solvent fires with smooth bore nozzles.

Answer 57

C. Exposure protection with standard fog nozzles. - 0.5% to 1% foam concentrate

Question 58

Starting the Vehicle: 5 Steps: The first this the driver/operator needs to know is where the apparatus is going. Then 5 steps: ``` Step 1: Step 2: Step 3: Step 4: Step 5: ```

Answer 58

Step 1: Disconnect all ground shore lines. (Step 1 is an Exam question) Step 2: Turn on the vehicle battery. Step 3: Start engine. Step 4: Observe the apparatus gauges. Step 5: Adjust the seat, mirrors, and steering wheel.

Question 59

A pumper is supplying a 500 foot of 2 1/2 inch hose with a 300 GPM fog nozzle. Determine the pump discharge pressure required to supply the hoseline.

Answer 59

``` FL = (C)(GPM/100)sq(HL/100) + NP FL = (2)(300/100)sq(500/100) + NP FL = (2)(3)sq(5) + 100 FL = (2)(9)(5) + 100 FL = 90 + 100 FL = 190 PSI ```

Question 60

What will be the total friction loss due to friction when 200 GPM is is being discharged from a nozzle that is attached to 100 feet of 3 inch hose?

Answer 60

GPM=discharged GPM/100 FL=(GPM)sq GPM=200/100 GPM=2 FL=(2)sq FL= 4 PSI

Question 61

NFPA 1002 specifies a number of practical driving exercises that the driver/operator candidate should be able to successfully complete before being certified to drive the apparatus. The practical exercise that is described as: (4) Tests the driver/operator's ability to back the apparatus while turning; move the vehicle backward within a restricted area without striking the walls and to bring the vehicle to a smooth stop close to the rear wall. A. Alley Dock Exercise. B. Serpentine Course Exercise. C. Confined Space Turnaround Exercise. D. Diminishing Clearance Exercise.

Answer 61

A. Alley Dock Exercise.

Question 62

NFPA 1002 specifies a number of practical driving exercises that the driver/operator candidate should be able to successfully complete before being certified to drive the apparatus. The practical exercise that is described as: (4) Simulates backing around parked vehicles and other obstacles. Simulates maneuvering around parked/stopped vehicles and tight corners. At least 3 markers are placed an equal distance apart in a line; the driver/operator is required to maneuver the vehicle first backward through the coarse and the forward. Must be traveled in each direction in one continuous motion without touching any of the coarse markers. A. Alley Dock Exercise. B. Serpentine Course Exercise. C. Confined Space Turnaround Exercise. D. Diminishing Clearance Exercise.

Answer 62

B. Serpentine Course Exercise.

Question 63

NFPA 1002 specifies a number of practical driving exercises that the driver/operator candidate should be able to successfully complete before being certified to drive the apparatus. The practical exercise that is described as: (4) Simulates the need to reverse directions with little room to maneuver; tests the driver/operator's ability to turn the vehicle 180 degrees with limited space. A. Alley Dock Exercise. B. Serpentine Course Exercise. C. Confined Space Turnaround Exercise. D. Diminishing Clearance Exercise.

Answer 63

C. Confined Space Turnaround Exercise.

Question 64

NFPA 1002 specifies a number of practical driving exercises that the driver/operator candidate should be able to successfully complete before being certified to drive the apparatus. The practical exercise that is described as: (4) Measures the driver/operator's ability to steer the apparatus in a straight line, to judge distances from wheel to object, and to stop at a finish line. Tests the ability to steer the apparatus in very narrow spaces. A. Alley Dock Exercise. B. Serpentine Course Exercise. C. Confined Space Turnaround Exercise. D. Diminishing Clearance Exercise.

Answer 64

D. Diminishing Clearance Exercise. | ^ exam question

Question 65

Determine the pump discharge pressure for fire Department pumper that is using two 3 inch hoselines with 2 1/2 couplings to supply an elevated master device with fixed piping 200 feet away. The elevated master stream is discharging 1000 GPM through a fog nozzle that is elevated 60 feet.

Answer 65

``` FL=(C)(GPM/100)sq(HL/100)+EP+MS+NP FL=(0.2)(10)sq(2)+EP+MS+NP FL=40+EP+MS+NP FL=40+30+25+100 FL= 195 PSI ```

Question 66

What will be the total pressure loss in 500 feet of 4 inch hose flowing 1000GPM?

Answer 66

``` GPM = GPM Discharged/100 FL = (GPM)sq ``` GPM = 10 ``` FL = (10)sq FL = 100 PSI ```

Question 67

A pumper is flowing one line with 250 GPM flowing. The static pressure was 70 PSI, and the residual pressure is reading 63 PSI. Determine how many additional lines can be added.

Answer 67

``` PD = (static-residual)(100)/static PD = (70-63)(100) / 70 PD = (7)(100) / 70 PD = 700 / 70 PD = 7% - 3 additional lines ```

Question 68

Altitude affects the production of fire streams because atmospheric pressure drops as height above sea level increases. This pressure drop is of little consequence to about _____ feet. Above this height, though, the lessened atmospheric pressure can be of concern. A. 500 feet. B. 1000 feet. C. 2000 feet. D. 2500 feet.

Answer 68

C. 2,000 feet.

Question 69

At high altitudes, fire department pumpers must work harder to produce effective fire stream pressures. Above sea level, atmospheric pressure decreases approximately: A. 5 psi for every 500 feet. B. 5 psi for every 1000 feet. C. 10 psi every 500 feet. D. 10 psi every 1000 feet.

Answer 69

B. 5 psi for every 1000 feet.

Question 70

Two 2 1/2 inch hoselines, one 500 feet long and the other 300 feet long, are equipped with 250 GPM fog nozzles. Determine the pump discharge required to supply the hoselines.

Answer 70

``` (Only need to calculate longest HL since the second HL can be gated back) FL = (C)(GPM/100)sq(HL/100)+NP FL = (2)(250/100)sq(500/100)+NP FL = (2)(2.5)sq(5) + NP FL = (2)(6.25)(5) + 100 FL = 62.5 + 100 FL = 162.5 PSI ```

Question 71

What will be the total pressure loss in 600 feet of 4 inch hose flowing 1000 GPM?

Answer 71

``` GPM = discharged GPM/100 GPM = 1000/100 GPM = 10 ``` ``` FL = (GPM)sq FL = (10)sq FL = 100 PSI ``` (Exam says 120 PSI?)

Question 72

A pumper is supplying one line with 250 GPM flowing. The static pressure was 70 PSI, and the residual pressure is reading 63 PSI. Determine how many additional lines can be added:

Answer 72

``` PD = (static-residual)(100)/static PD = (70-63)(100) / 70 PD = (7)(100) / 70 PD = 700 / 70 PD = 10% - 3 additional lines ```

Question 73

Determine the pump discharge pressure for fire Department pumper that is using two 3 inch hoselines with 2 1/2 inch couplings to supply an elevated master device with fixed piping 250 feet away. The elevated master stream is discharging 1000 GPM through a fog nozzle that is elevated 70 feet.

Answer 73

``` FL=(C)(GPM/100)sq(HL/100)+MS+EP+NP FL=(0.2)(1000/100)sq(250/100)+MS+EP+NP FL=(0.2)(100)(2.5)+25+35+100 FL= 50 + 160 FL = 210 PSI ```

Question 74

What will be the total pressure loss in 600 feet of 4 inch hose flowing 1000 GPM?

Answer 74

``` GPM = (GPM discharge) / 100 FL = (GPM)sq / 5 ``` ``` GPM = 10 FL = (10)sq / 5 FL = 100 / 5 FL = 20 per 100 feet FL = (20)(6) FL = 120 PSI ```

Question 75

Equation F: Formula for 3 inch hose:

Answer 75

FL per 100 ft = (Q)sq * (Q = GPM/100)

Question 76

Equation G: Formula for 4 inch hose:

Answer 76

FL per 100 ft = (Q)sq / 5

Question 77

Equation A: 1) FL Formula in PSI is: Must know "coefficient" # for: Single Hose Lines: 2)- 1 3/4 with 1 1/2 inch couplings 3)- 2 1/2 inch hose Siamesed Lines of Equal Length: 4) - Two 2 1/2 inch 5) - Two 3 inch 2 1/2 inch couplings

Answer 77

1) FL = (C)(GPM/100)sq(HL/100) 2) 15.5 3) 2 4) 0.5 5) 0.2

Question 78

Equation B: Formula for Elevation Pressure in feet:

Answer 78

EP = (0.5)(height in feet)

Question 79

Equation C: Formula for elevation pressure in a multistoried building:

Answer 79

EP = 5 PSI x (# of stories - 1)

Question 80

Equation D: Formula for Pump Discharge Pressure:

Answer 80

PDP = NP + TFL | TFL = FL + AP + EP

Question 81

Nozzle Pressures: 1) Solid stream nozzle (handling) = ____ PSI 2) Soild stream nozzle (master stream) = _____ PSI 3) Standard fog nozzle = ____ PSI 4) Low pressure fog nozzle = ___ to ___ PSI

Answer 81

1) 50 PSI 2) 80 PSI 3) 100 PSI 4) 50 to 75 PSI

Question 82

Equation I: Formula to find Percent Drop:

Answer 82

%D= (Static - Residual)(100) / Static 0-10% Drop = 3 additional lines 11-15% Drop = 2 additional lines 16-25% Drop = 1 additional line 25% or more = 0 more lines of equal flow

Question 83

A pumper is supplying one line with 250 GPM flowing. The static pressure was 60 PSI, and the residual pressure reading is 53 PSI. Determine how many more additional lines can be added:

Answer 83

``` PD = (Static - Residual)(100) / Static PD = (60-53)(100) / 60 PD = (7)(100) / 60 PD = 700 / 60 PD = ~ 12% - 2 additional lines ```

Question 84

According to NFPA 1901, the apparatus must carry at least (1)_____ to be considered a mobile water supply apparatus. The weight distribution and load requirements generally limit tank capacity to (2)_____ for single rear axle vehicles; and tank capacities of (3)_____ tandem rear axles, tri-axles, or tractor-trailer design should be considered. ``` A. 1000 gallons. B. 1000 gallons or less. C. 1000 gallons or more. D. 1500 gallons. E. 1500 gallons or less. F. 1500 gallons or more. ```

Answer 84

1) A. 1000 gallons. 2) E. 1500 gallons or less. 3) F. 1500 gallons or more.

Question 85

Types of Pressure: (6) _____ pressure is greatest at low altitudes and least at very high altitudes. At sea level, the atmosphere exerts a pressure of 14.7 psi, which is considered standard _____ pressure. ``` A. Atmospheric pressure. B. Head pressure. C. Static pressure. D. Residual pressure. E. Normal operating pressure. F. Flow pressure. ```

Answer 85

A. Atmospheric pressure.

Question 86

Types of Pressure: (6) _____ pressure in the fire service refers to the height of a water supply over the discharge orifice. ``` A. Atmospheric pressure. B. Head pressure. C. Static pressure. D. Residual pressure. E. Normal operating pressure. F. Flow pressure. ```

Answer 86

B. Head pressure. | Exam question ^

Question 87

Types of Pressure: (6) The water flow definition of _____ pressure is stored potential energy available to force water through pipe, fittings, fire hose, and adapters. Means at rest or without motion. ``` A. Atmospheric pressure. B. Head pressure. C. Static pressure. D. Residual pressure. E. Normal operating pressure. F. Flow pressure. ```

Answer 87

C. Static pressure.

Question 88

Types of Pressure: (6) _____ pressure is that pressure found in a water distribution system during normal consumption demands. ``` A. Atmospheric pressure. B. Head pressure. C. Static pressure. D. Residual pressure. E. Normal operating pressure. F. Flow pressure. ```

Answer 88

E. Normal operating pressure.

Question 89

Types of Pressure: (6) _____ pressure is that part of the total available pressure not used to overcome friction loss or gravity while forcing water through pipe, fittings, fire hose, and adapters. Means a remainder or that which is left. ``` A. Atmospheric pressure. B. Head pressure. C. Static pressure. D. Residual pressure. E. Normal operating pressure. F. Flow pressure. ```

Answer 89

D. Residual pressure.

Question 90

Types of Pressure: (6) _____ pressure is that forward velocity pressure at a discharge opening while water is flowing. Because a stream of water emerging from a discharge opening is not encased within a tube, it exerts forward pressure but not lateral pressure. Can be measured by using a pitot tube and gauge. ``` A. Atmospheric pressure. B. Head pressure. C. Static pressure. D. Residual pressure. E. Normal operating pressure. F. Flow pressure. ```

Answer 90

F. Flow pressure.

Question 91

Keep in mind that all fire department pumpers are rated to flow their maximum volume 100% at (1)_____ PSI, 70% of their maximum volume at (2)_____ PSI, and 50% of their maximum volume at (3)_____ PSI at draft.

Answer 91

1) 150 PSI (exam question) 2) 200 PSI 3) 250 PSI

Question 92

What is the total pressure loss due to friction in 250 feet of 1 3/4 inch hose when 150 GPM is flowing?

Answer 92

``` FL = (C)(GPM/100)sq(HL/100) FL = (15.5)(1.5)sq(2.5) FL = (15.5)(2.25)(2.5) FL = ~ 87.2 PSI ```

Question 93

A pumper is supplying 500 feet of 2 1/2 inch hose that is flowing 300 GPM through a fog stream nozzle. Determine the pump discharge pressure required to supply the hoseline.

Answer 93

``` FL = (C)(GPM/100)sq(HL/100)+NP FL = (2)(3)sq(5)+NP FL = (2)(9)(5)+100 FL = 190 PSI ```

Question 94

All fire department pumpers should be capable of pumping water from a static water supply. The entire priming action typically requires 10 to 15 seconds from start to finish, but when using no more than 20 feet of hard intake hose lifting a maximum of 10 vertical feet, It should not take more than _____ seconds in pumps larger than 1,250 GPM. A. 25 seconds. B. 30 seconds. C. 45 seconds. D. 60 seconds.

Answer 94

C. 45 seconds. (in pumps larger than 1,250 GPM.) | *30 seconds in pumps smaller than 1,250 GPM

Question 95

1. A) In residential areas, the recommended size for fire hydrant supply mains is at least _____ inches in diameter. B) There should be ____ inch cross connecting mains at intervals of not more than 600 feet. 2. In the business and industrial districts, the minimum recommended size is an ____ inch main with cross connecting mains every 600 feet. 3. ____ inch mains may be used on principal streets and in long mains not crossed connected at frequent intervals. 4. Water mains as large as ____ inches maybe found in major cities.

Answer 95

1. A) 6 inches (exam question) B) 8 inches / 600 ft 2. 8 inch / 600 ft 3. 12 inches 4. 48 inches

Question 96

If 300 GPM is flowing from a nozzle, what is the total pressure loss due to friction for 400 feet of 2 1/2 inch hose?

Answer 96

``` FL = (C)(GPM/100)sq(HL/100) FL = (2)(3)sq(4) FL = 72 PSI ```

Question 97

A hoseline operating on a ninth-floor structure fire is connected to a building standpipe system. What is the total pressure loss due to elevation?

Answer 97

9-1=8 8x5 = 40 PSI

Question 98

The foam nozzle eductor operates on the same basic principle as the in-line eductor. The self-educting master stream foam nozzle is used where flows in excess of _____ GPM are required. A. 250 GPM. B. 350 GPM. C. 500 GPM. D. 1000 GPM.

Answer 98

B. 350 GPM.

Question 99

Class B foams are mixed in proportions of 1% - 6%. Some multipurpose foams designed for use on both hydrocarbon and polar solvent fuels can be used at different concentrations, depending on the fuel they are used on. Concentrations of _____ are normally used on hydrocarbons depending on manufactures recommendations. A. 1% - 3%. B. 3% - 6%. C. 1.5%, 2%, or 3%. D. 6% or more.

Answer 99

``` A. 1% - 3%. (Hydrocarbon fuels) ________________________________ B. 3% - 6%. (Polar solvent fuels) C. 1.5%, 2%, or 3%. (Typical % used for Class B Medium-expansion foams) D. 6% or more. (N/A) ``` *** 3% Class B Medium expansion foam typically used for flammable or combustible liquids****

Question 100

1) Statistics compiled annually by the NFPA historically show that ____ to ____% of all firefighter injuries and deaths in the US are caused by vehicle collisions while responding to returning from emergency calls. 2) The data translate into as many as ____ firefighter deaths per year caused by vehicle collisions and rollovers. 3) The data shows that collisions at _____ are by far the most frequent and most severe.

Answer 100

1) 20 - 25% (exam question) 2) 25 deaths per year 3) intersections

Question 101

In general, fire apparatus collisions can be grouped into the following five basic causes. The following are TRUE... the exception is: A. Improper backing of the apparatus. B. Reckless driving by the operator. C. Excessive speed by the fire apparatus driver/operator. D. Lack of driving skill and experience by the fire apparatus driver-operator. E. Poor apparatus design or maintenance.

Answer 101

B. Reckless driving by the "operator". (FALSE - "public")

Question 102

In general, fire apparatus collisions can be grouped into five basic causes… The exception is: A. Improper backing of the apparatus. B. Excessive speed by the fire apparatus driver/operator. C. Failure to obey posted traffic regulations or directions. D. Lack of driving skill and experience by the fire apparatus driver/operator. (^ exam question)

Answer 102

C. Failure to obey posted traffic regulations or directions. | ^ would be an example of reckless driving by the public.

Question 103

Sound defensive driving skills are one of the most important aspects of safe driving. Every driver/operator should be familiar with the basic concepts of defensive driving. They include it… The exception is: ``` A. Anticipating other drivers actions. B. Backing the fire apparatus when possible. C. Estimating visual lead time. D. Knowing breaking and reaction times. E. Combating skids. F. Knowing evasive tactics. G. Having knowledge of weight transfer. ```

Answer 103

B. Backing fire apparatus when possible. | Exam question with added defensive driving techniques as stated in p.76

Question 104

1. At speeds above _____ mph, and emergency vehicle may "out-run" the effective range of it's audible warning device. 2. A study conducted by the staff of Driver's Reaction Course concluded that a siren operating on an emergency vehicle moving at 40 mph can project (A)____ feet in front of the vehicle. At a speed of 60 mph, however, the siren is only audible (B)____ feet or less in front of the vehicle. Driver/operators must drive within the effective range of their audible warning devices.

Answer 104

1. 50 mph (exam question) 2. A) 300 feet B) 12 feet

Question 105

Extinguishing Properties of Water: _____ heat - The ratio between the amount of heat needed to raise the temperature of a specified quantity of a material and the amount of heat needed to raise the temperature of an identical quantity of water by the same number of degrees (exam definition). A measure of the heat-absorbing capacity of a substance (book definition p.136). A. Latent Heat of Vaporization. B. Specific gravity. C. Specific heat. D. Water (H2O).

Answer 105

C. Specific heat.

Question 106

Extinguishing Properties of Water: The _____ is the quantity of heat absorbed by a substance when it changes from a liquid to a vapor. A. Latent Heat of Vaporization. B. Specific gravity. C. Specific heat. D. Water (H2O).

Answer 106

A. Latent Heat of Vaporization.

Question 107

Extinguishing Properties of Water: Specific Heat and Latent Heat of Vaporization govern the heat-absorbing ability of _____ . A. Latent Heat of Vaporization. B. Specific gravity. C. Specific heat. D. Water (H2O).

Answer 107

D. Water (H2O).

Question 108

____ is a compound of hydrogen and oxygen formed when two parts of hydrogen combined with one part of oxygen. A. Latent Heat of Vaporization. B. Specific gravity. C. Specific heat. D. Water (H2O).

Answer 108

D. Water (H2O).

Question 109

Extinguishing Properties of Water: _____ is the density of liquids in relation to water. Water is given a value of 1. Liquids with a _____ less than one are lighter than water and therefore float on water. Those with a _____ greater than one are heavier than water and sink to the bottom. If the other liquid also has a _____ of one, it mixes evenly with the water. A. Latent Heat of Vaporization. B. Specific gravity. C. Specific heat. D. Water (H2O).

Answer 109

B. Specific gravity.

Question 110

1) Water exists in a liquid state between ____ and ____°F. 2) Below ____F, water converts to a solid matter called ice. 3) Above ____°F (the boiling point of water), it converts into a gas called water vapor or steam. 4) When converted to steam, water expands approximately ____ times its original volume. 5) One gallon of water weighs ____ pounds. 6) A pound of water requires approximately ____ BTU's of heat to completely convert into steam.

Answer 110

1) 32°F to 212°F 2) 32°F 3) 212°F 4) 1,700 times 5) 8.33 pounds 6) 970 BTU's

Question 111

Amount of heat transfer is measured in: 1) A _____ is the amount of heat required to raise the temperature of 1 pound of water 1°F. 2) The ____ has taken the place of the calorie in the SI (International System of Units). 1 calorie = 4.19 ____ .

Answer 111

1. BTU (British thermal unit) | 2. Joule (1 cal = 4.19 joules)

Question 112

In changing water to steam, the least true statement is: A. Steam expansion is rapid. If the room is already filled with smoke and gases, the steam generated will displace the gases. B. Water can smother fire when it floats on liquids that are heavier than water. C. Water can smother fire by forming an emulsion over the surface of certain combustible liquids. D. Water can also smother fire when it floats on liquids that are lighter than water.

Answer 112

D. Water can also smother fire when it floats on liquids that are lighter than water. (Not a true statement)

Question 113

_____ is the tendency of a liquid to possess an internal resistance to flow. For example, water has a low _____ , while molasses has high _____ . A. Viscosity. B. Velocity. C. Friction loss. D. Flow Pressure.

Answer 113

A. Viscosity. | Velocity - speed at which fluid travels.

Question 114

The speed with which a fluid travels through hose or pipe is determined by the pressure upon that fluid. The speed at which this fluid travels is often referred to as _____ . A. Viscosity. B. Velocity. C. Friction loss. D. Flow Pressure.

Answer 114

B. Velocity.

Question 115

A water supply in a tank is 200 feet above a hydrant. The pressure at the hydrant would be most nearly: A. 50 PSI C. 70 PSI B. 60 PSI D. 80 PSI (Exam question)

Answer 115

Head Pressure = Feet / 2.304 Head Pressure = 200 / 2.3 Head Pressure = 86.9 PSI Answer = ~ 80 PSI (Exam question)

Question 116

A water supply in a tank is 100 feet above a hydrant. The water source has a head pressure of ____ PSI. (Book question, p144)

Answer 116

Head Pressure = Feet / 2.304 Head Pressure = 100 / 2.304 Head Pressure = 43.4 PSI

Question 117

_____ is the # of feet that 1 PSI will raise a 1-sq inch column of water. (Used to find Head Pressure by dividing number of feet by this #) Ex: Head Pressure = Feet / ____ A. 2.304 B. 62.5 C. 8.33 D. 14.7

Answer 117

``` A. 2.304 feet. ________________________________ B. 62.5 lbs. = 1 cubic foot of water C. 8.33 lbs. = 1 gallon of water D. 14.7 psi. = Atmospheric pressure at sea level ```

Question 118

Pressure in a water system before water flows from a hydrant is considered _____ pressure. ``` A. Head pressure. B. Nozzle pressure. C. Flow pressure. D. Static pressure. E. Residual pressure. ```

Answer 118

D. Static pressure.

Question 119

A waterflow definition of _____ pressure is that forward velocity pressure at a discharge opening while water is flowing. ``` A. Head pressure. B. Nozzle pressure. C. Flow pressure. D. Static pressure. E. Residual pressure. ```

Answer 119

C. Flow pressure.

Question 120

There are four basic principles that govern friction loss in fire hose and pipes… The exception is: A. If all other conditions are the same, friction loss varies directly with the length of hose or pipe. B. When hoses are the same size, friction loss varies approximately with the square of the increase in velocity of the flow. C. For the same discharge, friction loss varies inversely as the fifth power of the diameter, of the hose. D. For a given flow velocity, friction loss is governed by the pressure of the water.

Answer 120

D. For a given flow velocity friction loss is governed by the pressure of the water. (False statement) Correct 4th Principle: 4th Principle - For a given flow velocity, friction loss is approximately the same, "regardless" of the pressure on the water. ``` A. = 1st Principle B. = 2nd Principle C. = 3rd Principle ```

Question 121

Friction loss in a system will _____ as the length of hose/pipe increases. A. Increase. B. Decrease. C. Stay the same. D. Implode.

Answer 121

A. Increase.

Question 122

It is important to remember that there are practical limits to the velocity or speed at which a stream can travel. If the velocity is increased beyond the limits, the friction loss becomes so great that the entire stream is agitated by resistance. This agitation caused by a degree of turbulence is called _____ . Beyond this point, it becomes necessary to parallel or Siamese hoselines to increase the flow and reduce friction. A. Maximum velocity. B. Critical velocity. C. Crucial velocity. D. Extreme velocity.

Answer 122

B. Critical velocity.

Question 123

Water Distribution System: A Grid System should consist of the following components: 1. _____ feeders -Large pipes (mains), with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains. 2. _____ feeders - Network of intermediate sized pipes that reinforce the grid within the various loops of the primary feeder system and aid the concentration of the required fire flow at any point. 3. _____ - Grid arrangement of smaller mains serving individual fire hydrants and blocks of consumers.

Answer 123

1. Primary feeders 2. Secondary feeders 3. Distributors

Question 124

Water Distribution System: 1. A fire hydrant that receives water from only one direction is known as a _____ hydrant. 2. When a fire hydrant receives water from two or more directions, it is said to have a _____ feed or a _____ line. 3. A distribution system that provides circulating feed from several mains constitutes a _____ system. This system consists of primary feeders, secondary feeders, and distributors.

Answer 124

1. Dead-end hydrant 2. "Circulating feed" or "looped line" 3. Grid system

Question 125

Water System Capacity: Average daily consumption is - A. The average of the total amount of water used in a water distribution system over the period of one year. B. The maximum total amount of water that was used during any 24-hour interval within a 3-year period. C. The maximum amount of water used in any 1-hour interval over the course of a day.

Answer 125

A. The average of the total amount of water used in a water distribution system over the period of one year. (Average daily consumption) ________________________________ B. The maximum total amount of water that was used during any 24-hour interval within a 3-year period. (Maximum daily consumption) C. The maximum amount of water used in any 1-hour interval over the course of a day. (Peak hourly consumption)

Question 126

Water System Capacity: 1. The _____ is normally about 1 1/2 times the average daily consumption. 2. The _____ rate normally varies from 2 to 4 times the normal hourly rate. A. Average daily consumption. B. Maximum daily consumption. C. Peak hourly consumption.

Answer 126

1. B. Maximum daily consumption. | 2. C. Peak hourly consumption.

Question 127

What is the total pressure loss due to friction in 400 feet of 2 1/2 inch hose when 200 GPM is flowing:

Answer 127

``` FL = (C)(GPM/100)sq(HL/100) FL = (2)(200/100)sq(400/100) FL = (2)(2)sq(4) FL = (2)(4)(4) FL = 32 PSI ```

Question 128

Friction loss can be caused by a number of factors: hose conditions, coupling conditions, or kinks. The "primary" determinant, however, is the: A. Volume of water flowing per minute. B. Elevation pressure. C. Appliance pressure. D. Nozzle pressure.

Answer 128

A. Volume of water flowing per minute. (GPM)

Question 129

A hoseline operating on the 8th floor structural fire is connected to the buildings standpipe system. What is the total pressure loss due to elevation at the base of the Standpipe?

Answer 129

``` EP = 5 PSI x (Stories - 1) EP = 5 x (8-1) EP = 5 x 7 EP = 35 PSI ```

Question 130

A structure located at the top of a 75 foot hill has a fire on the 4th floor. Determine the total loss of pressure due to elevation.

Answer 130

``` EP = (feet)(0.5) EP = 5(stories-1) EP = (75)(0.5) EP = (5)(3) EP = 32.5 PSI + EP = 15 ``` EP = 47.5 PSI (Exam answer is 52.5 PSI meaning the simply added the 4 stories as an additional 40 feet for equation)

Question 131

Subbasement = ____ below ground

Answer 131

2 stories below ground

Question 132

A fire is discovered in the subbasement of a structure. An arriving engine Company proceeds to the basement of the structure and connects 100 feet of 2 1/2 inch hose to the Standpipe outlet. Determine the total pressure loss due to friction and elevation pressure at the standpipe system fire department connection when 250 GPM is flowing. Disregard friction loss in the standpipe.

Answer 132

``` FL=(c)(GPM/100)sq(HL/100)+EP FL=(2)(250/100)sq(100/100)+EP FL=(2)(2.5)sq(1)+EP FL=(2)(6.25)(1)+EP FL= 12.5 + EP (5PSI per floor) FL = 12.5 + (-10) FL = 2.5 PSI ```

Question 133

In most cases, fire departments have predetermined pressures that the driver/operator is expected to pump into the fire department connection (FDC) at the scene of a standpipe system. Treat the FDC like any other hose appliance. If the flow in the system exceeds 350 GPM, add ____PSI of friction loss for the FDC.

Answer 133

10 PSI

Question 134

Using the hand method, what will be the total pressure loss due to friction when 300 GPM is being discharged from a nozzle that is attached to 200 feet of 2 1/2 inch hose?

Answer 134

36 PSI ----------------------------------------- Hand method p.258 T I M R P 2 3 4 5 6 7 8 9 10 100 200 300 400 500 150 250 350 450 Find the GPM finger then multiply the tip number by the first number of the GPM = PSI per 100 feet of hose

Question 135

As a standard practice, it is not desirable to reduce the incoming pressure from a hydrant or supply pumper below _____ . ``` A. 25 psi. B. 20 psi. C. 15 psi. D. 10 psi. E. 5 psi. ```

Answer 135

B. 20 psi.

Question 136

1. When operating from a pressurized water supply source with a two-stage pump, it is good operating practice to set the transfer valve to the _____ position. 2. An exception to this rule would be if very high pressures are required for very long supply lines. In this case you would want the pump placed into _____ position. A. Parallel (VOLUME) position. B. Series (PRESSURE) position. C. Parallel (PRESSURE) position. D. Series (VOLUME) position.

Answer 136

1. A. Parallel (VOLUME) position. 2. B. Series (PRESSURE) position. (C & D are false / don't exist)

Question 137

Using the percentage method, determine how many additional lines can be added to a pumper supplying one line with 250 GPM flowing, if the static pressure was 80 psi, and the residual pressure is 70 PSI.

Answer 137

``` PD = (Static-Residual)(100) / Static PD = (80-75)(100) / 80 PD = (5)(100) / 80 PD = 500 / 80 PD = 6.25% = 3 additional lines ```

Question 138

Using the first digit method, determine how many additional lines can be added to a pumper supplying one line with 150 GPM flowing, if the static pressure was 60 PSI, and the residual pressure is 45 PSI.

Answer 138

Difference in PSI = Static-Resdual Difference in PSI = 60-45 Difference in PSI = 15 1st digit in static x 1 6x1=6 (less than 15) 6x2=12 (less than 15) - 2 more lines 6x3=18 (Great than 15) (p. 333) Exam says 1 line?

Question 139

While the pump is moving water, the vacuum reading on the master intake gauge provides an indication of the remaining pump capacity. The maximum amount of vacuum that most pumps develop is approximately _____ . ``` A. 14.7 B. 22 C. 2.304 D. 8.33 E. 62.5 ```

Answer 139

``` B. 22 inches of mercury. ________________________________ A. 14.7 psi. (Atmospheric pressure) B. 22 inches of mercury. (Vacuum pressure) C. 2.304 psi. (Head pressure) D. 8.33 lbs. (= 1 gallon of water) E. 62.5 lbs. (= 1 cubic foot of water) ```

Question 140

When conducting drafting operations, the master intake gauge will register a vacuum reading of about: A. 1 inch for each 1 foot of lift. B. 2 inches for each 1 foot of lift. C. 1 lbs for each inch of lift. D. 2 lbs for each inch of lift.

Answer 140

A. 1 inch for each 1 foot of lift.

Question 141

There are two basic types of foam: chemical and mechanical. The term defined as "the mixture of foam concentrate and water before the introduction of air" would be: A. Foam concentrate. B. Foam proportioner. C. Foam solution. D. Foam / Finished foam.

Answer 141

C. Foam solution. (exam question)

Question 142

The raw foam liquid in it's storage container before being combined with water and air is: A. Foam concentrate. B. Foam proportioner. C. Foam solution. D. Foam / Finished foam.

Answer 142

A. Foam concentrate.

Question 143

The device that introduces foam concentrate into the water stream to make the foam solution is: A. Foam concentrate. B. Foam proportioner. C. Foam solution. D. Foam / Finished foam.

Answer 143

B. Foam proportioner.

Question 144

The mixture of foam concentrate and water before the introduction of air is: A. Foam concentrate. B. Foam proportioner. C. Foam solution. D. Foam / Finished foam.

Answer 144

C. Foam solution.

Question 145

The completed product after air is introduced into the foam solution is: A. Foam concentrate. B. Foam proportioner. C. Foam solution. D. Foam / Finished foam.

Answer 145

D. Foam / Finished foam.

Question 146

_____ are the majority of foams in use today. These foams must be proportioned (mixed with water) and aerated (mixed with air) before they can be used. To produce quality firefighting foam, foam concentrate, water, air, and mechanical aeration are needed. A. Mechanical foams. B. High-expansion foams. C. Medium-expansion foams. D. Low-expansion foams.

Answer 146

A. Mechanical foams.

Question 147

Class A foam is the formulation of specialty hydrocarbon surfactants. The shelf-life of Class A foam concentrate can be as much as _____ . A. 10 years. B. 20 years. C. 25 years. D. 20 - 25 years.

Answer 147

``` B. 20 years. (Class A foams) ________________________________ A. 10 years. (Class B or Regular protein foams) B. 20 years. (Class A foams) C. 25 years. D. 20 - 25 years. (Synthetic-based) ```

Question 148

_____ is the formulation of hydrocarbon surfactants that reduce the surface tension of the water in the foam solution. Reducing the surface tension provides better penetration of the water, thereby increasing its effectiveness. This agent has proven to be effective for fires in structures, wildland settings, coal mines, tire storage, and other incidents involving similar deep-seated fuels. ``` A. Class A foam. B. Class B foam. C. Regular protein foam. D. Fluoroprotein foam. E. Aqueous Film Forming Foam (AFFF). F. Alcohol Resistant AFFF (AR-AFFF). G. Film forming fluoroprotein foam (FFFP). ```

Answer 148

A. Class A foam.

Question 149

_____ is used to extinguish fires involving flammable and combustible liquids. It is also used to suppress vapors from unignited spills of these liquids. ``` A. Class A foam. B. Class B foam. C. Regular protein foam. D. Fluoroprotein foam. E. Aqueous Film Forming Foam (AFFF). F. Alcohol Resistant AFFF (AR-AFFF). G. Film forming fluoroprotein foam (FFFP). ```

Answer 149

B. Class B foam.

Question 150

Class B foam concentrates are manufactured from either a synthetic or a protein base. Protein-based foams have a normal shelf-life of about (1)______ . Synthetic-based foams will have a longer shelf life, generally (2)______ . A. 10 years. B. 20 years. C. 25 years. D. 20 - 25 years.

Answer 150

1) A. 10 years. 2) D. 20 - 25 years. ________________________________ A. 10 years. (Class B or Regular protein foams) B. 20 years. (Class A foams) C. 25 years. D. 20 - 25 years. (Synthetic-based)

Question 151

Foam expansion refers to the increase in volume of a foam solution when it is aerated. The method of aerating a foam solution results in varying degrees of expansion, which depends on the following factors… The exception is: ``` A. Type of foam concentrate used B. Accurate proportioning of the foam concentrate in the solution C. Quality of foam concentrate D. Method of aspiration E. Whether or not the fuel is on fire ```

Answer 151

E. Whether or not the fuels on fire (false statement) | All other statements are correct, p. 460

Question 152

Specific Foam Concentrates: Numerous types of foams are selected for specific applications according to their properties and performance. _____ is the most commonly used foam today. ``` A. Class A foam. B. Class B foam. C. Regular protein foam. D. Fluoroprotein foam. E. Aqueous Film Forming Foam (AFFF). F. Alcohol Resistant AFFF (AR-AFFF). G. Film forming fluoroprotein foam (FFFP). ```

Answer 152

E. Aqueous Film Forming Foam (AFFF).

Question 153

Specific Foam Concentrates: _____ is derived from naturally occurring sources of protein such as hoof, horn, or feather meal. The protein meal is hydrolyzed in the presence of lime and converted into a protein hydrolysate that is neutralized. This foam is rarely used in the fire service today. ``` A. Class A foam. B. Class B foam. C. Regular protein foam. D. Fluoroprotein foam. E. Aqueous Film Forming Foam (AFFF). F. Alcohol Resistant AFFF (AR-AFFF). G. Film forming fluoroprotein foam (FFFP). ```

Answer 153

C. Regular protein foam.

Question 154

Specific Foam Concentrates: _____, a combination protein-based and synthetic-based foam, is derived from protein foam concentrates to which fluorochemical surfactants are added. The fluorochemical surfactants are similar to those developed for AFFF agents but are used in much lower concentrations. The addition of these chemicals produces a foam that flows easier than regular protein foam, provides a strong "security blanket" for a long-term vapor suppression that is especially critical with unignited spills. ``` A. Class A foam. B. Class B foam. C. Regular protein foam. D. Fluoroprotein foam. E. Aqueous Film Forming Foam (AFFF). F. Alcohol Resistant AFFF (AR-AFFF). G. Film forming fluoroprotein foam (FFFP). ```

Answer 154

D. Fluoroprotein foam.

Question 155

Specific Foam Concentrates: _____ concentrate is based on fluoroprotein foam technology with aqueous film forming foam (AFFF) capabilities. This foam incorporates the benefits of AFFF for fast fire knockdown and the benefits of fluoroproteins foam for long lasting heat resistance. Is available in an alcohol-resistant formulation. ``` A. Class A foam. B. Class B foam. C. Regular protein foam. D. Fluoroprotein foam. E. Aqueous Film Forming Foam (AFFF). F. Alcohol Resistant AFFF (AR-AFFF). G. Film forming fluoroprotein foam (FFFP). ```

Answer 155

G. Film forming fluoroprotein foam (FFFP).

Question 156

Specific Foam Concentrates: _____ is completely synthetic, consists of fluorochemical and hydrocarbon surfactants combined with high boiling point solvents and water. Is the most commonly used foam today. Available in alcohol-resistant (AR) formulas, normally used at 3% or 6% concentrations. ``` A. Class A foam. B. Class B foam. C. Regular protein foam. D. Fluoroprotein foam. E. Aqueous Film Forming Foam (AFFF). F. Alcohol Resistant AFFF (AR-AFFF). G. Film forming fluoroprotein foam (FFFP). ```

Answer 156

E. Aqueous Film Forming Foam (AFFF).

Question 157

Specific Foam Concentrates: _____ are special-purpose foams and have a detergent base. Because they have a low water content, they minimize water damage. Their low water content is also useful when runoff is undesirable. These foams are desirable to use in concealed spaces (such as basements, coal mines, and in other subterranean spaces), in fixed extinguishing systems for specific industrial uses such as rolled or bulk paper storage, and in Class A fire applications. A. Mechanical foams. B. High-expansion foams. C. Medium-expansion foams. D. Low-expansion foams.

Answer 157

B. High-expansion foam.

Question 158

Apparatus-Mounted Foam Proportioning Systems: This type of proportioner is one of the most common types of built in proportional's installed in mobile fire apparatus today (exam question). Consists of a small return (bypass) water line connected from the discharge side of the pump back to the intake side of the pump. A. Around-the-Pump Proportioners. B. Installed In-Line Eductor Systems. C. Bypass-Type Balanced Pressure Proportioner. D. Variable-Flow Variable-Rate Direct Injection Systems. E. Variable-Flow Demand-Type Balanced Pressure Proportioners. F. Batch-Mixing.

Answer 158

A. Around-the-Pump Proportioners.

Question 159

Apparatus-Mounted Foam Proportioning Systems: _____ systems have an eductor permanently attached to the apparatus pumping system. Uses the Venturi Principle to draft foam concentrate into the water stream. It is very important to follow the manufacturers instructions about inlet pressure and the maximum hose lay between the eductor and the appropriate nozzle. Are most commonly used to proportion Class B foam, are not effective for proportioning Class A foam. A. Around-the-Pump Proportioners. B. Installed In-Line Eductor Systems. C. Bypass-Type Balanced Pressure Proportioner. D. Variable-Flow Variable-Rate Direct Injection Systems. E. Variable-Flow Demand-Type Balanced Pressure Proportioners. F. Batch-Mixing.

Answer 159

B. Installed In-Line Eductor Systems.

Question 160

Apparatus-Mounted Foam Proportioning Systems: _____ Proportioner is one of the most accurate methods of foam proportioning. It is most commonly used in large-scale mobile apparatus applications such as airport crash vehicles and refinery firefighting apparatus. Primary advantages are its ability to monitor the demand for foam concentrate and to adjust the amount of concentrate supplied. Also has the ability to discharge foam from some outlets and plain water from others at the same time. Thus, a single apparatus can supply both foam attack lines and protective cooling water lines simultaneously. A. Around-the-Pump Proportioners. B. Installed In-Line Eductor Systems. C. Bypass-Type Balanced Pressure Proportioner. D. Variable-Flow Variable-Rate Direct Injection Systems. E. Variable-Flow Demand-Type Balanced Pressure Proportioners. F. Batch-Mixing.

Answer 160

C. Bypass-Type Balanced Pressure Proportioner.

Question 161

Apparatus-Mounted Foam Proportioning Systems: _____ Systems - This type of proportioner operates off power supply from the apparatus electrical system. Large volume systems may use a combination of electric and hydraulic power. The foam concentrate injection is controlled by monitoring the water flow in controlling the speed of a positive displacement foam concentrate pump, thus injecting concentrate at the desired ratio. Because the water flow governs the foam concentrate injection, water pressure is not a factor. Full flow through the fire pump discharges is possible because there are no flow restricting passages in the proportioning system. **** These systems may not be used with alcohol-resistant foam concentrates due to the high viscosity of the concentrate (exam question)*** A. Around-the-Pump Proportioners. B. Installed In-Line Eductor Systems. C. Bypass-Type Balanced Pressure Proportioner. D. Variable-Flow Variable-Rate Direct Injection Systems. E. Variable-Flow Demand-Type Balanced Pressure Proportioners. F. Batch-Mixing.

Answer 161

D. Variable-Flow Variable-Rate Direct Injection Systems.

Question 162

Apparatus-Mounted Foam Proportioning Systems: _____ Proportioners, also called pumped/demand system, is a versatile system. In this system, a veritable speed mechanism, which is either hydraulically or electrically controlled, drives a foam concentrate pump. Advantages are the foam concentrate flow and pressure match system demand and there is no recirculation back to the foam concentrate tank. A. Around-the-Pump Proportioners. B. Installed In-Line Eductor Systems. C. Bypass-Type Balanced Pressure Proportioner. D. Variable-Flow Variable-Rate Direct Injection Systems. E. Variable-Flow Demand-Type Balanced Pressure Proportioners. F. Batch-Mixing.

Answer 162

E. Variable-Flow Demand-Type Balanced Pressure Proportioners.

Question 163

Apparatus-Mounted Foam Proportioning Systems: _____ is by far the simplest means of proportioning foam. Achieved by simply pouring a predetermined amount of foam concentrate into the tank via the top fill opening at the time foam is needed. The pump is then operated normally and foam is discharge through any hoseline that is open. A. Around-the-Pump Proportioners. B. Installed In-Line Eductor Systems. C. Bypass-Type Balanced Pressure Proportioner. D. Variable-Flow Variable-Rate Direct Injection Systems. E. Variable-Flow Demand-Type Balanced Pressure Proportioners. F. Batch-Mixing.

Answer 163

F. Batch-Mixing.

Question 164

High-energy foam systems differ from conventional foam systems in that they introduce compressed air into the foam solution prior to discharge into the hoseline. These systems are commonly called compressed-air-foam system (CAFS). A limitation of CAFS is: A. The reach of the fire stream is considerably longer than streams from low-energy systems. B. A CAFS produces uniformly sized, small air bubbles that are very durable. C. Hose reaction can be erratic with a CAFS if foam solution is not supplied to the hoseline in sufficient quantities. D. A CAFS provides a safer fire suppression action that allows effective attack on the fire from a greater distance.

Answer 164

C. Hose reaction can be erratic with a CAFS if foam solution is not supplied to the hoseline in sufficient quantities. (Exam question p. 472)

Question 165

All of the following nozzles may be used with fluoroprotein foam… The exception is: A. Solid bore nozzles. B. Fog nozzles. C. Air-aspirating foam nozzles. D. Master stream foam nozzles.

Answer 165

B. Fog nozzles.

Question 166

Foam Nozzles: With respect to foam application, the use of _____ nozzles is limited to Class A, compressed-air foam systems (CAFS) applications. In these applications, _____ nozzles provide an effective fire stream that has maximum reach capabilities. A. Solid bore nozzles. B. Fog nozzles. C. Air-aspirating foam nozzles. D. Master stream foam nozzles.

Answer 166

A. Solid bore nozzles. aka Smoothbore or solid stream nozzles

Question 167

Foam Nozzles: _____ Nozzles can be used with foam solution to produce a low expansion, short lasting foam. These nozzles break the foam solution into tiny droplets and use the agitation of water droplets moving through air to achieve the foaming action. Their best application is when used with regular AFFF and Class A foam. However, these nozzles cannot be used with protein and fluoroprotein foam, and because insufficient aspiration occurs, they should not be used on polar solvent fires either. A. Solid bore nozzles. B. Fog nozzles. C. Air-aspirating foam nozzles. D. Master stream foam nozzles.

Answer 167

B. Fog nozzles

Question 168

Foam Nozzles: _____ foam nozzles inducts air into the foam solution by a Venturi action. This is the only type of nozzle that can be used with protein and flouroprotein concentrates. These nozzles may also be used with Class A foam and wildland applications. They provide maximum expansion of the agent, but since most of the streams energy is used to induce air, the reach of the stream is less than that of a standard fog nozzle. A. Solid bore nozzles. B. Fog nozzles. C. Air-aspirating foam nozzles. D. Master stream foam nozzles.

Answer 168

C. Air-aspirating foam nozzle.

Question 169

Foam Nozzles: _____ foam nozzles are for large-scale flammable and combustible liquid fires that are beyond the capabilities of handlines. A. Solid bore nozzles. B. Fog nozzles. C. Air-aspirating foam nozzles. D. Master stream foam nozzles.

Answer 169

D. Master stream foam nozzles

Question 170

Determine the total pressure loss due to friction and elevation pressure in 200 feet of 1 3/4 inch hose with 1 1/2 inch couplings, flowing 100 GPM, when the hoseline is operating on the second floor.

Answer 170

``` FL=(C)(GPM/100)sq(HL/100)+EP FL=(15.5)(1)sq(2) +EP FL= 31 + (5)x(stories-1) FL = 31+ 5 FL = 36 PSI ```

Question 171

Calculate the total pressure loss due to friction and elevation pressure in 200 feet of 2 1/2 inch hose flowing 200 GPM when the hoseline is operating at the top of a 50 foot incline.

Answer 171

``` FL=(C)(GPM/100)sq(HL/100) + EP FL=(2)(2)sq(2) FL=16 + EP=0.5(50) FL= 16 + 25 FL= 41 PSI ```

Question 172

Three 3 inch hoselines with 2 1/2 inch couplings, 250 feet long and each equipped with a 1 1/8 inch tip at 50 PSI. What is the total pressure loss due to friction in each line?

Answer 172

``` GPM = GPM discharged / 100 GPM = 250/100 GPM = 2.5 ``` FL = (GPM)sq FL = 6.25 per 100 feet FL = (Can't figure out! p.195/exam C LC #8)

Question 173

If 300 GPM is flowing, what will be the total pressure loss due to friction in 200 feet of 2 1/2 inch hose?

Answer 173

FL=(C)(GPM/100)sq(HL/100) FL=(2)(3)sq(2) FL= 36 PSI

Question 174

_____ is that forward velocity pressure at a discharge opening while water is flowing. If the size of the opening is known, a firefighter can use the measurement of flow pressure to calculate the quantity of water flowing in GPM. A. Velocity pressure. B. Nozzle pressure. C. Flow pressure. D. Head pressure.

Answer 174

C. Flow pressure.

Question 175

Calculate the total friction loss due to friction, if an engine is pumping through a 400 foot, 3 inch (2 1/2 inch couplings) feeder that is wyes off to two 2 1/2 inch attack lines each 400 feet long and equipped with a 250 GPM fog nozzle.

Answer 175

``` FL=(c)(GPM/100)sq(HL/100) FL=(2)(250/100)sq(400/100) FL=(2)(2.5)sq(4) FL=(2)(6.25)(4) FL=50 + FL=(c)(GPM/100)sq(HL/100) FL=(0.8)(500/100)sq(400/100) FL=(0.8)(5)sq(4) FL=(0.8)(25)(4) FL=80 ``` ``` FL = 50+80+10(AP) FL = 140 PSI ``` * Note that the GPM is doubled in the supply line before the wye, over 350 GPM prior to the wye = + 10 PSI in Appliance FL) * * Post wye only need to calculate one line or the longer line if they are of unequal lengths*

Question 176

To keep friction loss within reasonable limits firefighters may lay two or more parallel hoselines and Siamese them together at a point close to the fire. When two hoselines of equal lengths are Siamesed to supply a fire stream, friction loss will be approximately ____ percent of that of a single hose line at the same nozzle pressure. A. 15% B. 25% C. 50% D. 65%

Answer 176

B. 25%

Question 177

The friction loss coefficient for siamesed lines of equal length for two 2 1/2 inch lines is:

Answer 177

0.5

Question 178

The friction loss coefficient for siamesed lines of equal length for two 3 inch lines with 2 1/2 inch couplings is:

Answer 178

0.2

Question 179

The friction loss coefficient for a single hoseline 1 3/4 inches with 1 1/2 inch couplings is:

Answer 179

15.5

Question 180

The friction loss coefficient for a single hoseline 2 1/2 inches is:

Answer 180

2

Question 181

Calculate the total pressure loss due to friction, where a pumper is pumping into two 3 inch (2 1/2 inch couplings) Siamesed and both are 900 feet in length. The attack line from the Siamese is 300 feet in length and is a 2 1/2 inch hose, equipped with a 1 1/4 inch tip at 50 PSI nozzle pressure.

Answer 181

95 PSI ? ``` GPM = (29.7)(tip)sq(sq route of NP) GPM = (29.7)(1.25)sq(sq route of 50) GPM = (29.7)(1.56)(7) GPM = 324 Siamesed: FL=(C)(GPM/100)sq(HL/100) FL=(0.2)(325/100)sq(900/100) FL=(0.2)(3.25)sq(9) FL=19 Attack line: FL=(C)(GPM/100)sq(HL/100) FL=(2)(3.25)sq(3) FL=63.4 ``` FL=63.4+19+10 FL= 92.4 PSI (Exam C #43 sts answer is 95 PSI)

Question 182

A fire is discovered on the fourth floor of a structure. The first arriving engine Company proceeds to the third floor of the occupancy and connects four 50 foot sections of 1 3/4 inch (1 1/2 inch couplings) to the standpipe outlet. What is the total pressure loss due to friction and elevation pressure if 125 GPM is flowing?

Answer 182

``` FL=(C)(GPM/100)sq(HL/100)+EP FL=(15.5)(125/100)sq(200/100)+EP FL=(15.5)(1.25)sq(2)+(5x(4-1) FL=(15.5)(1.56)(2)+15 FL= 48.4 + 15 FL = 63.4 PSI ``` (Exam C #44 = 64 PSI)

Question 183

If 250 GPM is flowing from a nozzle, what is the total pressure loss due to friction for 300 feet of 2 1/2 inch hose?

Answer 183

``` FL=(C)(GPM/100)sq(HL/100) FL=(2)(250/100)sq(300/100) FL=(2)(2.5)sq(3) FL=(2)(6.25)(3) FL= 37.5 PSI ```

Question 184

An engine is pumping through two lines, each 200 feet of 1 3/4 inch (1 1/2 inch couplings) and equipped with 3/4 inch tips operating at 50 PSI nozzle pressure. Determine the total pressure loss due to friction in each hoseline.

Answer 184

``` GPM = (29.7)(tip)sq(Sq route of NP) GPM = (29.7)(0.75)sq(7.07) GPM = (29.7)(0.6)(7.07) GPM = 125 ``` ``` FL=(C)(GPM/100)sq(HL/100) FL=(15.5)(125/100)sq(200/100) FL=(15.5)(1.25)sq(2) FL=(15.5)(1.56)(2) FL = 48.4 PSI ``` (Exam C #46 sts answer as 43 PSI)

Question 185

An automatic nozzle will maintain a constant nozzle pressure of ____ PSI, no matter how much the pump discharge pressure is above this figure.

Answer 185

100 PSI

Question 186

There are some disadvantages to using water as a fire extinguishing agent. An exception would be: A. A relatively large amount of heat is required to change water into steam. B. Water has a high surface tension. C. Water has a low opacity. D. Water has a low reflectivity.

Answer 186

A. A relatively large amount of heat is required to change water into steam. (Advantage)

Question 187

A standpipe that has 50 feet of water in it has a pressure at it's base of most nearly:

Answer 187

20 PSI ----------------------------------------- 2.304 feet of water column exerts 1 PSI at its base. Head Pressure formula: So... 50/2.3 = ~22 PSI

Question 188

A hoseline operating on the 8th floor structural fire is connected to the building standpipe system what is the total pressure loss due to elevation at the base of the Sandpipe.

Answer 188

``` EP = 5x(stories-1) EP = 5x(8-1) EP = 5x7 EP = 35 PSI ```

Question 189

Calculate the total pressure loss due to friction and elevation pressure in 300 feet of 1 3/4 inch hose (1 1/2 inch couplings) flowing at 200 GPM when the nozzle is operating the top of a 50 foot hill.

Answer 189

``` FL=(C)(GPM/100)sq(HL/100)+ EP FL=(15.5)(200/100)sq(300/100)+EP FL=(15.5)(2)sq(3)+ (0.5(50)) FL=(15.5)(4)(3)+25 FL=186+25 FL= 211 PSI ```

Question 190

A fire is burning in the sub basement of a structure. The first arriving engine Company proceeds to the basement and 200 feet of 2 1/2 inch hose to the Standpipe. Determine the total pressure loss due to friction and elevation pressure at the standpipe system connected with 200 GPM following.

Answer 190

FL=(C)(GPM/100)sq(HL/100) - EP FL=(2)(2)sq(2) - 10(subbasement) FL=16-10 FL= 6 PSI

Question 191

Some firehose tends to expand to a larger inside diameter under high pressure. Keep in mind that this tendency will _____ the velocity and _____ the first loss. A. Decrease - Increase B. Increase - decrease C. Decrease - decrease D. Increase - increase

Answer 191

C. Decrease - decrease

Question 192

The rate of discharge of a fire stream is measured in gallons per minute. 1) The velocity of the stream in the size of the discharge opening determine the flow from a solid stream nozzle. 2) When solid stream nozzles are used on hand lines, they should be operated at 50 PSI. A. #1 is true. B. #2 is true. C. #1 and #2 are true. D. #1 and # 2 are false.

Answer 192

C. #1 and #2 are true.

Question 193

There are six basic principles that determine the action of pressure on fluids... the exception is: A. Fluid pressure is perpendicular to any surface on which it acts. B. The pressure of the liquid in the bottom of a vessel is dependent on the shape of the vessel. C. The pressure of the liquid in an open vessel is proportional to its depth. D. The pressure of a liquid in an open vessel is proportional to the density of the liquid.

Answer 193

B. The pressure of a liquid in the bottom of a vessel is "dependent" on the shape of the vessel. (FALSE - "independent")

Question 194

Water exerts a pressure of _____ per foot of elevation. A. 0.434 psi. B. 1.434 psi. C. 4.340 psi. D. 2.304 psi.

Answer 194

A. 0.434 psi.

Question 195

According to Pumping Apparatus: "Friction loss in psi" is represented by: ``` A. FL. B. C. C. Q. D. L. E. EP. F. H. G. TPL. H. PDP. I. NP. ```

Answer 195

``` A. FL. = Friction loss in psi. ________________________________ B. C. = Friction loss coefficient. C. Q. = Flow rate and hundreds of GPM (flow/100). D. L. = Hose length and hundreds of feet (length/100). E. EP. = Elevation pressure. F. H. = Height in feet. G. TPL. = Total pressure loss. H. PDP. = Pump discharge pressure. I. NP. = Nozzle pressure in psi. ```

Question 196

According to Pumping Apparatus: "Total pressure loss" is represented by: ``` A. FL. B. C. C. Q. D. L. E. EP. F. H. G. TPL. H. PDP. I. NP. ```

Answer 196

``` G. TPL. = Total pressure loss. ________________________________ A. FL. = Friction loss in psi. B. C. = Friction loss coefficient. C. Q. = Flow rate and hundreds of GPM (flow/100). D. L. = Hose length and hundreds of feet (length/100). E. EP. = Elevation pressure. F. H. = Height in feet. G. TPL. = Total pressure loss. H. PDP. = Pump discharge pressure. I. NP. = Nozzle pressure in psi. ```

Question 197

According to Pumping Apparatus: "Flow rate and hundreds of GPM" or "(Flow/100)" is represented by: ``` A. FL. B. C. C. Q. D. L. E. EP. F. H. G. TPL. H. PDP. I. NP. ```

Answer 197

C. Q. = Flow rate and hundreds of GPM (flow/100). ________________________________ A. FL. = Friction loss in psi. B. C. = Friction loss coefficient. C. Q. = Flow rate and hundreds of GPM (flow/100). D. L. = Hose length and hundreds of feet (length/100). E. EP. = Elevation pressure. F. H. = Height in feet. G. TPL. = Total pressure loss. H. PDP. = Pump discharge pressure. I. NP. = Nozzle pressure in psi.

Question 198

According to Pumping Apparatus: "Height in feet" is represented by: ``` A. FL. B. C. C. Q. D. L. E. EP. F. H. G. TPL. H. PDP. I. NP. ```

Answer 198

``` F. H. = Height in feet. ________________________________ A. FL. = Friction loss in psi. B. C. = Friction loss coefficient. C. Q. = Flow rate and hundreds of GPM (flow/100). D. L. = Hose length and hundreds of feet (length/100). E. EP. = Elevation pressure. F. H. = Height in feet. G. TPL. = Total pressure loss. H. PDP. = Pump discharge pressure. I. NP. = Nozzle pressure in psi. ```

Question 199

According to Pumping Apparatus: "Pump discharge pressure" is represented by: ``` A. FL. B. C. C. Q. D. L. E. EP. F. H. G. TPL. H. PDP. I. NP. ```

Answer 199

``` H. PDP. = Pump discharge pressure. ________________________________ A. FL. = Friction loss in psi. B. C. = Friction loss coefficient. C. Q. = Flow rate and hundreds of GPM (flow/100). D. L. = Hose length and hundreds of feet (length/100). E. EP. = Elevation pressure. F. H. = Height in feet. G. TPL. = Total pressure loss. H. PDP. = Pump discharge pressure. I. NP. = Nozzle pressure in psi. ```

Question 200

According to Pumping Apparatus: "Elevation pressure in psi" is represented by: ``` A. FL. B. C. C. Q. D. L. E. EP. F. H. G. TPL. H. PDP. I. NP. ```

Answer 200

``` E. EP. = Elevation pressure in psi. ________________________________ A. FL. = Friction loss in psi. B. C. = Friction loss coefficient. C. Q. = Flow rate and hundreds of GPM (flow/100). D. L. = Hose length and hundreds of feet (length/100). E. EP. = Elevation pressure in psi. F. H. = Height in feet. G. TPL. = Total pressure loss. H. PDP. = Pump discharge pressure. I. NP. = Nozzle pressure in psi. ```

Question 201

According to Pumping Apparatus: "Friction loss coefficient" is represented by: ``` A. FL. B. C. C. Q. D. L. E. EP. F. H. G. TPL. H. PDP. I. NP. ```

Answer 201

``` B. C. = Friction loss coefficient. ________________________________ A. FL. = Friction loss in psi. B. C. = Friction loss coefficient. C. Q. = Flow rate and hundreds of GPM (flow/100). D. L. = Hose length and hundreds of feet (length/100). E. EP. = Elevation pressure. F. H. = Height in feet. G. TPL. = Total pressure loss. H. PDP. = Pump discharge pressure. I. NP. = Nozzle pressure in psi. ```

Question 202

According to Pumping Apparatus: "Hose length in hundreds of feet" or "(length/100)" is represented by: ``` A. FL. B. C. C. Q. D. L. E. EP. F. H. G. TPL. H. PDP. I. NP. ```

Answer 202

D. L. = Hose length and hundreds of feet (length/100). ________________________________ A. FL. = Friction loss in psi. B. C. = Friction loss coefficient. C. Q. = Flow rate and hundreds of GPM (flow/100). D. L. = Hose length and hundreds of feet (length/100). E. EP. = Elevation pressure. F. H. = Height in feet. G. TPL. = Total pressure loss. H. PDP. = Pump discharge pressure. I. NP. = Nozzle pressure in psi.

Question 203

According to Pumping Apparatus: "Nozzle pressure in psi" is represented by: ``` A. FL. B. C. C. Q. D. L. E. EP. F. H. G. TPL. H. PDP. I. NP. ```

Answer 203

``` I. NP. = Nozzle pressure in psi. ________________________________ A. FL. = Friction loss in psi. B. C. = Friction loss coefficient. C. Q. = Flow rate and hundreds of GPM (flow/100). D. L. = Hose length and hundreds of feet (length/100). E. EP. = Elevation pressure. F. H. = Height in feet. G. TPL. = Total pressure loss. H. PDP. = Pump discharge pressure. I. NP. = Nozzle pressure in psi. ```

Question 204

Equation A - Used to find Friction loss:

Answer 204

FL = (C)(Q)sq(L)

Question 205

Equation B - Used to find elevation pressure:

Answer 205

EP = (0.5)(H)

Question 206

Equation C - Used to find elevation pressure in multi storied buildings:

Answer 206

EP = (5psi)(# of stories - 1)

Question 207

Equation D - Used to find home discharge pressure in psi:

Answer 207

PDP = NP + TPL

Question 208

Equation F - Used to find Fiction loss in hundred feet of 3 inch hose:

Answer 208

FL per 100 feet = (Q)sq Note: The amount of friction loss calculated using this formula will be 20% greater than if the same situation is calculated using FL=(C)(Q)sq(L). This could mean as high as a 50 psi difference in 1000 foot, 3 inch hose lay.

Question 209

Equation G - Used to find Friction loss in 100 feet of 4 inch hose:

Answer 209

FL per 100 feet = (Q)sq / 5

Question 210

Equation I - Used to find percent drop.

Answer 210

%drop=(Static-Residual)(100)/Static

Question 211

_____ is that part of the total available pressure not used to overcome friction loss or gravity while forcing water through pipe, fittings, fire hose, and adapters. _____ means a remainder or that which is left. For example, during a fire flow test, _____ represents the pressure left in the distribution system within the vicinity of the flowing hydrants. A. Static pressure. B. Velocity pressure. C. Residual pressure. D. Operating pressure.

Answer 211

C. Residual pressure.

Question 212

Calculate the total pressure loss due to elevation of a hoseline operating at the tip of a 150 foot hill. A. 75 psi. B. 50 psi. C. 65 psi. D. 100 psi.

Answer 212

A. 75 psi.

Question 213

The Condensed "Q" Formula has been developed for fire ground operations. This formula, Q multiplied by itself is used to determine friction lost for _____ hose. A. 3 inch. B. 4 inch. C. 5 inch. D. 6 inch.

Answer 213

A. 3 inch. ________________________________ Key words is this question is "Q multiplied by itself", otherwise the Condensed Q formula could be used for 3,4, or 5 inch hose.

Question 214

When using 2 1/2 inch or 3 inch hose lines to supply the pumper directly off hydrant pressure, it is recommended that the lines are no longer than _____ . A. 500 feet. B. 400 feet. C. 300 feet. D. 200 feet.

Answer 214

C. 300 feet.

Question 215

When starting the apparatus under any conditions, especially under emergency response conditions, the first thing that the driver/operator needs to know is where the apparatus is going. The second step in starting the vehicle is: A. Adjusting the seat and mirrors, and steering wheel. B. Turning on the battery or batteries. C. Disconnecting all ground shore lines. D. Start engine.

Answer 215

C. Disconnecting all ground shore lines.

Question 216

Before starting the apparatus the driver/operator needs to know where the apparatus is going. Once the operator knows where he is going, the following procedure may be used to start the vehicle and begin the response: (List the 5 Steps in order) ``` A. Adjusting the seat and mirrors, and steering wheel. B. Turn on the battery or batteries. C. Disconnect all ground shore lines. D. Start engine. E. Observe the apparatus gauges. ```

Answer 216

Step 1: C. Disconnect all ground shore lines. Step 2: B. Turn on the battery or batteries. Step 3: D. Start engine. Step 4: E. Observe the apparatus gauges. Step 5: A. Adjusting the seat and mirrors, and steering wheel.

Question 217

Head in the fire service refers to the height of a water supply above the discharge orifices. A water tank would be required to be at a height of _____ above the ground, to maintain a pressure of 43.4 PSI? A. 100 feet. B. 75 feet. C. 63.5 feet. D. 43.4 feet.

Answer 217

A. 100 feet.

Question 218

If 200 GPM is flowing from a nozzle, what is the total pressure loss due to friction for 200 feet of 2 1/2 inch hose? A. 72 psi. B. 64 psi. C. 36 psi. D. 16 psi.

Answer 218

``` D. 16 psi. ----------------------------------------- FL = (C)(Q)sq(L) FL = (2)(200/100)sq(200/100) FL = (2)(2)sq(2) FL = (2)(4)(2) FL = 16 psi ```

Question 219

What will be the total pressure loss in 550 feet of 4 inch hose flowing 1000 GPM? A. 90 psi. B. 100 psi. C. 110 psi. D. 120 psi.

Answer 219

``` C. 110 psi. ----------------------------------------- FL per 100 feet = (Q)sq/5 FL per 100 feet = (1000/100)sq/5 FL per 100 feet = (10)sq/5 FL per 100 feet = (100)/5 FL per 100 feet = 20 psi So.. 550/100 = 5.5 5.5(20) = 110 psi * ```

Question 220

The first consideration in establishing a successful drafting operation is selecting the site. The choice is dictated by several factors. The most important factor in the choice of the draft site is: A. Accessibility of water. B. Amount of water available. C. Type of water. D. Travel distance to the water.

Answer 220

``` B. Amount of water available. ________________________________ 1. Amount of water. 2. Type of water. 3. Accessibility of water. ```

Question 221

In order for a pumper to approach it's rated capacity at draft using a traditional strainer, there should be a minimum of _____ of water over the strainer. It is also desirable to have _____ of water all around the strainer. A. 1 foot. B. 2 feet. C. 3 feet. D. 4 feet.

Answer 221

B. 2 feet.

Question 222

In the business and industrial districts, the minimum recommended size is _____ with cross connecting mains every 600 feet. A. 6 inch main. B. 8 inch main. C. 12 inch main. D. 24 inch main.

Answer 222

B. 8 inch main.

Question 223

To produce effective fire streams, it is necessary to know the amount of friction loss in the fire hose and any pressure loss or gain due to elevation. Friction loss can be caused by a number factors. The primary determinant, however, is: A. Hose condition. B. Coupling condition. C. Volume of water flowing per minute. D. Kinks.

Answer 223

C. Volume of water flowing per minute.

Question 224

Once the fire pump has been made operational, priming the pump starts the draft operation. If operating a two-stage pump, the transfer valve should be in the _____ position. A. Series. B. Pressure. C. Combination. D. Volume.

Answer 224

D. Volume. aka Parallel

Question 225

A fog stream may be produced by deflection at the periphery or by impinging jets of water or by a combination of these. _____ is described as: "A turning or state of being turned; a turning from a straight line or given course; a bending; a deviation". A. Impinge. B. Deflection. C. Periphery. D. Smoothbore.

Answer 225

B. Deflection.

Question 226

A fog stream may be produced by deflection at the periphery or by impinging jets of water or by a combination of these. _____ is described as: "The line bounding a rounded surface; the outward boundary of an object distinguished from its internal regions". A. Impinge. B. Deflection. C. Periphery. D. Smoothbore.

Answer 226

C. Periphery.

Question 227

A fog stream may be produced by deflection at the periphery or by impinging jets of water or by a combination of these. _____ is described as: "To strike or dash about or against; clashing with a sharp collision; to come together with force". A. Impinge. B. Deflection. C. Periphery. D. Smoothbore.

Answer 227

A. Impinge.

Question 228

The following terms are important to know when discussing the mechanical principles of fog streams... the exception is: A. Impinge. B. Deflection. C. Periphery. D. Smoothbore.

Answer 228

D. Smoothbore. (FALSE)

Question 229

Using the hand method, determine the total pressure loss due to friction in 400 feet of 2 1/2 inch hose when a solid stream nozzle is flowing 250 gallons per minute. A. 25 psi. B. 50 psi. C. 53 psi. D. 90 psi.

Answer 229

B. 50 psi. - ---------------------------------------- (2. 5)(5-top finger#)=12.5 per 100feet (12. 5)(400/100) = (12. 5)(4) = 50 psi.

Question 230

A pumper is supplying on hoseline. The static pressure was 60 psi and the residual pressure reading was 52 psi. Determine how many additional lines can be added. A. 4 additional lines. B. 3 additional lines. C. 2 additional lines. D. 1 additional line.

Answer 230

``` C. 2 additional lines. ----------------------------------------- %Drop=(Static-Res)(100)/Static %Drop=(60-52)(100)/60 %Drop=(8)(100)/60 %Drop= 800/60 %Drop= 13.3% So... 0-10% = 3 more lines 11-15% = 2 more lines 16-25% = 1 more line. 25+. = No more lines. ```

Question 231

All fire department pumpers should be capable of pumping water from a static water supply. The following statement is TRUE regarding pumping water from a static source. A. In order for a pumper to approach 100% of its rated capacity using a traditional strainer, there should be a minimum of 4 feet of water over the strainer. B. Increasing pump rpm will increase the discharge pressure until reaching pump capacity. C. If the pump will not reach its rated capacity, the first place to check is the discharge line. D. At 20 feet of lift, the amount of water that can be supplied is only about 60% of rated capacity.

Answer 231

D. At 20 feet of lift, the amount of water that can be supplied is only about 60% of rated capacity. (TRUE) ________________________________ A. In order for a pumper to approach 100% of its rated capacity using a traditional strainer, there should be a minimum of "4 feet" of water over the strainer. (FALSE - "2 feet") B. Increasing pump rpm "will increase" the discharge pressure until reaching pump capacity. (FALSE - "will not increase" cavitation) C. If the pump will not reach its rated capacity, the first place to check is the "discharge" line. (FALSE - "intake?")

Question 232

A water distribution system built in a grid system should consist of the following components... the exception is: A. Primary feeders. B. Secondary feeders. C. Distributors. D. Service lines.

Answer 232

D. Service lines.

Question 233

A fire hydrant that receives water from only one direction is known as a "dead-end hydrant". When a fire hydrant receives water from two or more directions it is said to have "circulating feed" or a "looped line". A distribution in system that provides circulating feed from several mains constitutes a "grid system". A grid system should consist of three components: Distributors are described by: A. Large pipes mains, with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains. B. Network of intermediate sized pipes that reinforce the grid within the various loops of the primary feeder system and aid the concentration of the required fire flow at any point. C. Grid arrangement of smaller mains serving individual fire hydrants and blocks of customers. D. Do not always provide sufficient flow for firefighting operations.

Answer 233

C. Grid arrangement of smaller mains serving individual fire hydrants and blocks of customers. (Distributors) ________________________________ A. Large pipes mains, with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains. (Primary feeders) B. Network of intermediate sized pipes that reinforce the grid within the various loops of the primary feeder system and aid the concentration of the required fire flow at any point. (Secondary feeders) C. Grid arrangement of smaller mains serving individual fire hydrants and blocks of customers. (Distributors) D. Do not always provide sufficient flow for firefighting operations. (Dead-end hydrants)

Question 234

A fire hydrant that receives water from only one direction is known as a "dead-end hydrant". When a fire hydrant receives water from two or more directions it is said to have "circulating feed" or a "looped line". A distribution in system that provides circulating feed from several mains constitutes a "grid system". A grid system should consist of three components: Primary feeders are described by: A. Large pipes mains, with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains. B. Network of intermediate sized pipes that reinforce the grid within the various loops of the primary feeder system and aid the concentration of the required fire flow at any point. C. Grid arrangement of smaller mains serving individual fire hydrants and blocks of customers. D. Do not always provide sufficient flow for firefighting operations.

Answer 234

A. Large pipes mains, with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains. (Primary feeders) ________________________________ B. Network of intermediate sized pipes that reinforce the grid within the various loops of the primary feeder system and aid the concentration of the required fire flow at any point. (Secondary feeders) C. Grid arrangement of smaller mains serving individual fire hydrants and blocks of customers. (Distributors) D. Do not always provide sufficient flow for firefighting operations. (Dead-end hydrants)

Question 235

A fire hydrant that receives water from only one direction is known as a "dead-end hydrant". When a fire hydrant receives water from two or more directions it is said to have "circulating feed" or a "looped line". A distribution in system that provides circulating feed from several mains constitutes a "grid system". A grid system should consist of three components: Secondary feeders are described by: A. Large pipes mains, with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains. B. Network of intermediate sized pipes that reinforce the grid within the various loops of the primary feeder system and aid the concentration of the required fire flow at any point. C. Grid arrangement of smaller mains serving individual fire hydrants and blocks of customers. D. Do not always provide sufficient flow for firefighting operations.

Answer 235

B. Network of intermediate sized pipes that reinforce the grid within the various loops of the primary feeder system and aid the concentration of the required fire flow at any point. (Secondary feeders) ________________________________ A. Large pipes mains, with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains. (Primary feeders) B. Network of intermediate sized pipes that reinforce the grid within the various loops of the primary feeder system and aid the concentration of the required fire flow at any point. (Secondary feeders) C. Grid arrangement of smaller mains serving individual fire hydrants and blocks of customers. (Distributors) D. Do not always provide sufficient flow for firefighting operations. (Dead-end hydrants)

Question 236

A fire hydrant that receives water from only one direction is known as a "dead-end hydrant". When a fire hydrant receives water from two or more directions it is said to have "circulating feed" or a "looped line". A distribution in system that provides circulating feed from several mains constitutes a "grid system". Dead-end hydrants can be described by: A. Large pipes mains, with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains. B. Network of intermediate sized pipes that reinforce the grid within the various loops of the primary feeder system and aid the concentration of the required fire flow at any point. C. Grid arrangement of smaller mains serving individual fire hydrants and blocks of customers. D. Do not always provide sufficient flow for firefighting operations.

Answer 236

D. Do not always provide sufficient flow for firefighting operations. (Dead-end hydrants) ________________________________ A. Large pipes mains, with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains. (Primary feeders) B. Network of intermediate sized pipes that reinforce the grid within the various loops of the primary feeder system and aid the concentration of the required fire flow at any point. (Secondary feeders) C. Grid arrangement of smaller mains serving individual fire hydrants and blocks of customers. (Distributors)

Question 237

When engineers design a water distribution system, there are three basic rates of consumption that they consider in their design. The average daily consumption is defined as: A. The maximum total amount of water that was used during any 24-hour interval within a three-year period. B. The maximum amount of water used in any 1-hour interval over the course of a day. C. The average of the total amount of water used in a water distribution system over the period of one year. D. 1 1/2 times the average of the total amount of water used during any 24-hour interval over the period of one year.

Answer 237

C. The average of the total amount of water used in a water distribution system over the period of one year. (Average daily consumption) ________________________________ A. The maximum total amount of water that was used during any 24-hour interval within a three-year period. (Maximum daily consumption) B. The maximum amount of water used in any 1-hour interval over the course of a day. (Peak hourly consumption) D. 1 1/2 times the average of the total amount of water used during any 24-hour interval over the period of one year.

Question 238

When engineers design a water distribution system, there are three basic rates of consumption that they consider in their design. The peak hourly consumption is defined as: A. The maximum total amount of water that was used during any 24-hour interval within a three-year period. B. The maximum amount of water used in any 1-hour interval over the course of a day. C. The average of the total amount of water used in a water distribution system over the period of one year. D. 1 1/2 times the average of the total amount of water used during any 24-hour interval over the period of one year.

Answer 238

B. The maximum amount of water used in any 1-hour interval over the course of a day. (Peak hourly consumption) ________________________________ A. The maximum total amount of water that was used during any 24-hour interval within a three-year period. (Maximum daily consumption) C. The average of the total amount of water used in a water distribution system over the period of one year. (Average daily consumption)

Question 239

When engineers design a water distribution system, there are three basic rates of consumption that they consider in their design. The maximum daily consumption is defined as: A. The maximum total amount of water that was used during any 24-hour interval within a three-year period. B. The maximum amount of water used in any 1-hour interval over the course of a day. C. The average of the total amount of water used in a water distribution system over the period of one year. D. Varies from 2 to 4 times the normal hourly rate.

Answer 239

A. The maximum total amount of water that was used during any 24-hour interval within a three-year period. (Maximum daily consumption) ________________________________ B. The maximum amount of water used in any 1-hour interval over the course of a day. (Peak hourly consumption) C. The average of the total amount of water used in a water distribution system over the period of one year. (Average daily consumption) D. Varies from 2 to 4 times the normal hourly rate.

Question 240

When engineers design a water distribution system, there are three basic rates of consumption that they consider in their design: The Average Daily Consumption (ADC), The Maximum Daily Consumption (MDC), and The Peak Hourly Consumption (PHC). The maximum daily consumption is normally about: A. 1 1/2 times the peak hourly rate. B. 1 1/2 times the average daily consumption. C. 1 1/2 times the normal hourly rate. D. Varies from 2 to 4 times the normal hourly rate. E. Varies from 2 to 4 times the average daily consumption. F. Varies 2 to 4 times the maximum daily consumption.

Answer 240

B. 1 1/2 times the average daily consumption. (maximum daily consumption) ________________________________ D. Varies from 2 to 4 times the normal hourly rate. (peak hourly rate)

Question 241

When engineers design a water distribution system, there are three basic rates of consumption that they consider in their design: The Average Daily Consumption (ADC), The Maximum Daily Consumption (MDC), and The Peak Hourly Consumption (PHC). The peak hourly rate normally: A. 1 1/2 times the peak hourly rate. B. 1 1/2 times the average daily consumption. C. 1 1/2 times the normal hourly rate. D. Varies from 2 to 4 times the normal hourly rate. E. Varies from 2 to 4 times the average daily consumption. F. Varies 2 to 4 times the maximum daily consumption.

Answer 241

D. Varies from 2 to 4 times the normal hourly rate. (peak hourly rate) ________________________________ B. 1 1/2 times the average daily consumption. (maximum daily consumption)

Question 242

In water system capacity, _____ is known as the maximum total amount of water that was used during any 24-hour interval within a three-year period. A. Peak hourly consumption (PHC). B. Maximum daily consumption (MDC). C. Average daily consumption (ADC). D. Normal hourly rate (NHR).

Answer 242

B. Maximum daily consumption (MDC). Note: MDC is normally about 1 1/2 times the average daily consumption (ADC).

Question 243

In water system capacity, _____ is known as the average of the total amount of water used in a water distribution system over the period of one year. A. Peak hourly consumption (PHC). B. Maximum daily consumption (MDC). C. Average daily consumption (ADC). D. Normal hourly rate (NHR).

Answer 243

C. Average daily consumption (ADC).

Question 244

In water system capacity, _____ is known as the maximum amount of water used in any one hour interval over the course of a day. A. Peak hourly consumption (PHC). B. Maximum daily consumption (MDC). C. Average daily consumption (ADC). D. Normal hourly rate (NHR).

Answer 244

A. Peak hourly consumption (PHC). Note: PHC normally varies from 2 to 4 times the normal hourly rate.

Question 245

In general, the private water supply system exists for one of the three following purposes... the exception is: A. To provide water strictly for fire protection purposes. B. To provide water for sanitary and fire protection purposes. C. To provide water for fire protection and manufacturing processes. D. To provide water for human consumption and fire protection purposes.

Answer 245

D. To provide water for "human consumption" and fire protection purposes. (FALSE)

Question 246

Nozzle pressure and the size of the discharge opening determine the flow and reach from a solid stream nozzle. A solid stream master stream device should be operated at: A. 40 psi B. 50 psi C. 80 psi D. 100 psi

Answer 246

C. 80 psi

Question 247

Nozzle pressure and the size of the discharge opening determine the flow and reach from a solid stream nozzle. A solid stream nozzle on a handline should be operated at: A. 40 psi B. 50 psi C. 80 psi D. 100 psi

Answer 247

B. 50 psi

Question 248

According to PAD: We will assume a 0 psi Appliance Friction Loss (AFL) for flows less than 350 GPM and a _____ AFL for each appliance (other than master stream devices) in a hose assembly when flowing 350 GPM or more. A. 10 psi. B. 15 psi. C. 20 psi. D. 25 psi.

Answer 248

A. 10 psi. | AFL when flowing 350 GPM or greater

Question 249

According to PAD: AFL: For this manual, we will assume a friction loss of _____ in all Master Stream Appliances, regardless of flow. A. 10 psi. B. 15 psi. C. 20 psi. D. 25 psi.

Answer 249

D. 25 psi.

Question 250

Determine the water flow from a 1 1/4 inch tip operating at 50 PSI? A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM.

Answer 250

C. 325 GPM. (1 1/4" @ 50 psi) ``` Note: 1 1/4" is considered the largest tip for hand lines and the smallest for Master Streams. ________________________________ A. 200 GPM. (1" @ 50 psi) B. 250 GPM. (1 1/8" @ 50 psi) C. 325 GPM. (1 1/4" @ 50 psi) D. 400 GPM. (1 3/8" @ 50 psi) ```

Question 251

Determine the water flow from a 1 inch tip operating at 50 PSI? A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM.

Answer 251

``` A. 200 GPM. (1" @ 50 psi) ________________________________ B. 250 GPM. (1 1/8" @ 50 psi) C. 325 GPM. (1 1/4" @ 50 psi) D. 400 GPM. (1 3/8" @ 50 psi) ```

Question 252

Determine the water flow from a 1 1/8 inch tip operating at 50 PSI? Aka the "Big gun". A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM.

Answer 252

``` B. 250 GPM. (1 1/8" @ 50 psi) ________________________________ A. 200 GPM. (1" @ 50 psi) B. 250 GPM. (1 1/8" @ 50 psi) C. 325 GPM. (1 1/4" @ 50 psi) D. 400 GPM. (1 3/8" @ 50 psi) ```

Question 253

Determine the water flow from a 1 3/8 inch tip operating at 50 PSI? A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM.

Answer 253

``` D. 400 GPM. (1 3/8" @ 50 psi) ________________________________ A. 200 GPM. (1" @ 50 psi) B. 250 GPM. (1 1/8" @ 50 psi) C. 325 GPM. (1 1/4" @ 50 psi) D. 400 GPM. (1 3/8" @ 50 psi) ```

Question 254

Determine the water flow from a 1 3/8 inch tip operating at 80 PSI? ``` A. 400 GPM. B. 500 GPM. C. 600 GPM. D. 800 GPM. E. 1000 GPM. ```

Answer 254

``` B. 500 GPM. (1 3/8" @ 80 psi) ________________________________ A. 400 GPM. (1 1/4" @ 80 psi) B. 500 GPM. (1 3/8" @ 80 psi) C. 600 GPM. (1 1/2" @ 80 psi) D. 800 GPM. (1 3/4" @ 80 psi) E. 1000 GPM. (2" @ 80 psi) ```

Question 255

Determine the water flow from a 1 1/4 inch tip operating at 80 PSI? ``` A. 400 GPM. B. 500 GPM. C. 600 GPM. D. 800 GPM. E. 1000 GPM. ```

Answer 255

``` A. 400 GPM. (1 1/4" @ 80 psi) ________________________________ B. 500 GPM. (1 3/8" @ 80 psi) C. 600 GPM. (1 1/2" @ 80 psi) D. 800 GPM. (1 3/4" @ 80 psi) E. 1000 GPM. (2" @ 80 psi) ```

Question 256

Determine the water flow from a 1 3/4 inch tip operating at 80 PSI? ``` A. 400 GPM. B. 500 GPM. C. 600 GPM. D. 800 GPM. E. 1000 GPM. ```

Answer 256

``` D. 800 GPM. (1 3/4" @ 80 psi) ________________________________ A. 400 GPM. (1 1/4" @ 80 psi) B. 500 GPM. (1 3/8" @ 80 psi) C. 600 GPM. (1 1/2" @ 80 psi) D. 800 GPM. (1 3/4" @ 80 psi) E. 1000 GPM. (2" @ 80 psi) ```

Question 257

Determine the water flow from a 1 1/2 inch tip operating at 80 PSI? ``` A. 400 GPM. B. 500 GPM. C. 600 GPM. D. 800 GPM. E. 1000 GPM. ```

Answer 257

``` C. 600 GPM. (1 1/2" @ 80 psi) ________________________________ A. 400 GPM. (1 1/4" @ 80 psi) B. 500 GPM. (1 3/8" @ 80 psi) C. 600 GPM. (1 1/2" @ 80 psi) D. 800 GPM. (1 3/4" @ 80 psi) E. 1000 GPM. (2" @ 80 psi) ```

Question 258

Determine the water flow from a 2 inch tip operating at 80 PSI? ``` A. 400 GPM. B. 500 GPM. C. 600 GPM. D. 800 GPM. E. 1000 GPM. ```

Answer 258

``` E. 1000 GPM. (2" @ 80 psi) ________________________________ A. 400 GPM. (1 1/4" @ 80 psi) B. 500 GPM. (1 3/8" @ 80 psi) C. 600 GPM. (1 1/2" @ 80 psi) D. 800 GPM. (1 3/4" @ 80 psi) ```

Question 259

To produce effective fire streams, it is necessary to know the amount of friction loss in the fire hose and any pressure loss or gain due to elevation. The primary determinant, of friction loss is: A. Hose conditions. B. Coupling conditions. C. The gallon per minute flow in the hose. D. Kinks.

Answer 259

C. The gallon per minute flow in the hose.

Question 260

The coefficient of 1 3/4 inch hose with 1 1/2 inch couplings is: A. 0.2. B. 0.5. C. 2. D. 15.5.

Answer 260

D. 15.5. (1 3/4" hose w 1 1/2" couplings) ________________________________ A. 0.2. (Two 3" w 2 1/2" couplings) B. 0.5. (Two 2 1/2" hoses) C. 2. (2 1/2" hose) D. 15.5. (1 3/4" hose w 1 1/2" couplings)

Question 261

The coefficient for a 2 1/2 inch rubber line hose is: A. 0.2. B. 0.5. C. 2. D. 15.5.

Answer 261

``` C. 2. (2 1/2" hose) ________________________________ A. 0.2. (Two 3" w 2 1/2" couplings) B. 0.5. (Two 2 1/2" hoses) C. 2. (2 1/2" hose) D. 15.5. (1 3/4" hose w 1 1/2" couplings) ```

Question 262

The coefficient for two 2 1/2 inch hose lines of equal length is: A. 0.2. B. 0.5. C. 2. D. 15.5.

Answer 262

``` B. 0.5. (Two 2 1/2" hoses) ________________________________ A. 0.2. (Two 3" w 2 1/2" couplings) B. 0.5. (Two 2 1/2" hoses) C. 2. (2 1/2" hose) D. 15.5. (1 3/4" hose w 1 1/2" couplings) ```

Question 263

The coefficient for two 3 inch hose of equal length with 2 1/2 inch couplings is: A. 0.2. B. 0.5. C. 2. D. 15.5.

Answer 263

``` A. 0.2. (Two 3" w 2 1/2" couplings) ________________________________ B. 0.5. (Two 2 1/2" hoses) C. 2. (2 1/2" hose) D. 15.5. (1 3/4" hose w 1 1/2" couplings) ```

Question 264

What is the total pressure loss due to friction in 400 feet of 2 1/2 inch hose when 200 gallons per minute is flowing: A. 16 psi. B. 24 psi. C. 32 psi. D. 40 psi.

Answer 264

``` C. 32 psi. ----------------------------------------- FL = (C)(Q)sq(L) FL = (2)(200/100)sq(400/100) FL = (2)(2)sq(4) FL = (2)(4)(4) FL = 32 psi ```

Question 265

Calculate the total pressure loss due to elevation pressure for a hoseline operating on top of a 50 foothill. A. 50 psi. B. 35 psi. C. 25 psi. D. 15 psi.

Answer 265

``` C. 25 psi. ----------------------------------------- EP = (0.5)(H) EP = (0.5)(50) EP = 25 psi ```

Question 266

A fire is discovered in the subbasement of a structure. And arriving engine Company proceeds to the basement of the structure and connects 100 feet of 2 1/2 inch hose to the standpipe outlet. Determine the total pressure loss due to friction and elevation pressure at standpipe system fire department connection when 250 GPM is flowing. Disregard friction loss in standpipe. A. 2.5 psi. B. 5.5 psi. C. 8.5 psi. D. 10.5 psi.

Answer 266

``` A. 2.5 psi. Note: Subbasement is -20 feet. ----------------------------------------- FL=(C)(Q)sq(L) + EP=(0.5)(H) FL=(2)(2.5)sq(1) + EP=(0.5)(-20) FL=(2)(6.25)(1) + EP=(-10) FL = 12.5 + -10 FL = 2.5 psi ```

Question 267

A hoseline operating on an 8th floor structural fire is connected to a building standpipe system. What is the total pressure loss due to elevation at the base of the standpipe. A. 25 psi. B. 30 psi. C. 35 psi. D. 40 psi.

Answer 267

``` C. 35 psi. ----------------------------------------- EP = 5 psi x (# stories - 1) EP = 5 (8 - 1) EP = 5 (7) EP = 35 psi ```

Question 268

Calculate the total pressure loss due to friction and elevation pressure in 300 feet of one and 1 3/4 inch hose (1 1/2 inch couplings) flowing at 200 GPM when the nozzles operating at the top of a 50 foothill. A. 201 psi. B. 211 psi. C. 191 psi. D. 181 psi.

Answer 268

``` B. 211 psi. ----------------------------------------- FL=(C)(Q)sq(L) + EP=(0.5)(H) FL=(15.5)(4)(3) + EP=(0.5)(50) FL= 186 + EP= 25 FL = 211 psi ```

Question 269

In most cases, fire departments have predetermined pressures that the driver/operator is expected to pump into the fire department connection (FDC) of a standpipe system. Treat the FDC like any other hose appliance. If the flow in the system exceeds 350 GPM, add _____ of friction loss for the FDC. A. 10 psi. B. 20 psi. C. 30 psi. D. 40 psi.

Answer 269

A. 10 psi.

Question 270

To keep friction loss within reasonable limits, firefighters may lay two or more parallel hose lines and Siamese them together at a point close to the fire. Went two hose lines of equal lengths are Siamese to supply a fire stream, friction loss will be approximately _____ percent of that of a single hoseline at the same nozzle pressure. A. 10 B. 15 C. 20 D. 25

Answer 270

D. 25

Question 271

The friction loss coefficient for siamesed lines of equal length for 2 - 2 1/2 inch lines is: A. 2 B. 15.5 C. 0.2 D. 0.5

Answer 271

D. 0.5

Question 272

The coefficient for 2 - 3 inch lines with 2 1/2 inch couplings is: A. 2 B. 15.5 C. 0.2 D. 0.5

Answer 272

C. 0.2

Question 273

Using the hand method, what will be the total pressure loss due to friction when 300 GPM is being discharged from and a nozzle that is attached to 200 feet of 2 1/2 inch hose? A. 24 psi. B. 30 psi. C. 36 psi. D. 42 psi.

Answer 273

C. 36 psi. | I just used the regular method

Question 274

Using the condensed Q formula, what will be the total pressure loss in 400 feet of 4 inch hose flowing 900 GPM? A. 48 psi. B. 52 psi. C. 56 psi. D. 60 psi.

Answer 274

``` D. 60 psi. (best answer given) ----------------------------------------- FL per 100 ft = (Q)sq/5 FL per 100 ft = (9)sq/5 FL per 100 ft = 81/5 FL per 100 ft = ~16 So (16)(4) = ~64psi ```

Question 275

As a standard practice, it is not desirable to reduce the incoming pressure from a hydrant or supply pump or below _____ . A. 10 psi. B. 15 psi. C. 20 psi. D. 25 psi.

Answer 275

C. 20 psi.

Question 276

When operating from a pressurized water supply source with a two-stage pump, it is good operating practice to set the transfer valve to the _____ position. A. Volume. B. Pressure. C. Leave the valve in the position used last. D. It doesn't matter what position it is in.

Answer 276

A. Volume.

Question 277

Because the pump on a hydrant or in the middle of a relay is usually called on to supply large amounts of water, it is good operating practice to set the transfer valve to the _____ position. An exception to this rule would be if very high pressures are required for very long supply lines. A. Parallel (volume). B. Series (pressure). C. Parallel (pressure). D. Series (volume).

Answer 277

A. Parallel (volume).

Question 278

Using the first digit method, determine how many additional lines can be added to a pumper supplying one line with 150 GPM flowing, if the static pressure was 60 PSI and the residual pressure is 45 PSI. A. No additional lines. B. Three additional lines. C. Two additional lines. D. One additional line.

Answer 278

``` D. One additional line. (25%) ----------------------------------------- %D = (S - R) (100) / S %D = (60 - 45)(100) / 60 %D = (15)(100) / 60 %D = 1500 / 60 %D = 25% = 1 additional line ```

Question 279

While the pump is moving water, the vacuum reading on the master intake gauge provides an indication of the remaining pump capacity. The maximum amount of vacuum that most pumps develop is approximately _____ . A. 18 inches hg. B. 22 inches hg. C. 26 inches hg. D. 30 inches hg.

Answer 279

B. 22 inches hg.

Question 280

When conducting drafting operations, the master intake gauge will register a vacuum reading of about: A. 30 inches hg. B. 1 inch hg per 1,000 ft above sea level. C. 1 inch hg per 1 foot of lift. D. 1 inch hg per 100 GPM flow.

Answer 280

C. 1 inch hg per 1 foot of lift.

Question 281

The entire priming action typically requires 10 to 15 seconds from start to finish, but when using no more than 20 feet of hard intake hose lifting a maximum of 10 vertical feet, it should not take more than _____ . A. 25 seconds. B. 30 seconds. C. 35 seconds. D. 45 seconds.

Answer 281

B. 30 seconds. Note: 45 seconds in pumps larger than 1250 GPM.

Question 282

The entire priming action typically requires 10 to 15 seconds from start to finish, but when using no more than 20 feet of hard intake hose lifting a maximum of 10 vertical feet, it should not take more than _____ in pumps larger than 1250 GPM. A. 25 seconds. B. 30 seconds. C. 35 seconds. D. 45 seconds.

Answer 282

D. 45 seconds. (in pumps larger than 1250 GPM)

Question 283

If a prime has not been achieved in 30 seconds, stop priming and check to find out what the problem is. The following are possible causes for an inability to prime, the most common cause is: A. An air leak. B. Insufficient fluid in the priming reservoir. C. Engine speed (rpm) is too low. D. Lift is too high. E. A high point in the air intake hose creating an air pocket.

Answer 283

A. An air leak.

Question 284

There are two basic types of foam: chemical and mechanical. The term defined as "The mixture of foam concentrate and water before the introduction of air" would be which of the following choices? A. Foam concentrate. B. Foam solution. C. Foam proportioner. D. Foam.

Answer 284

B. Foam solution.

Question 285

There are two basic types of foam: chemical and mechanical. The term defined as "The device that introduces foam concentrate into the water stream to make the foam solution" would be which of the following choices? A. Foam concentrate. B. Foam solution. C. Foam proportioner. D. Foam.

Answer 285

C. Foam proportioner.

Question 286

There are four basic methods by which foam may be proportioned... the exception is: ``` A. Introduction. B. Premixing. C. Injection. D. Postmixing. E. Batch mixing. ```

Answer 286

D. Postmixing. (FALSE)

Question 287

Class A foam is the formulation of specialty hydrocarbon surfactants. The shelf life of Class A foam concentrate can be as much as: A. 20 years. B. 15 years. C. 10 years. D. 5 years.

Answer 287

A. 20 years.

Question 288

Foam expansion refers to the increase in volume of a foam solution when it is aerated. The method of aerating a foam solution results in varying degrees of expansion, which depends on the following factors... the exception is: ``` A. Type of foam concentrate used. B. Whether or not the fuel is on fire. C. Quality of foam concentrate. D. Method of aspiration. E. Accurate proportioning of the foam concentrate in the solution. ```

Answer 288

B. Whether or not the fuel is on fire. (FALSE)

Question 289

Numerous types of foams are selected for specific applications according to their properties and performance. _____ is the most commonly used foam today. A. Regular protein foam. B. Film forming fluoroprotein foam. C. Fluoroprotein foam. D. Aqueous film forming foam.

Answer 289

D. Aqueous film forming foam.

Question 290

Foam proportioning systems are commonly mounted on structural, industrial, wildland, and aircraft rescue and firefighting apparatus, as well as fireboats. The type of proportioner which is one of the most common types of built in proportioner's installed in mobile fire apparatus today is: A. Installed in-line eductors. B. Bypass-type balanced pressure proportioners. C. Around-the-pump proportioners. D. Variable-flow variable-rate direct injection systems.

Answer 290

C. Around-the-pump proportioners.

Question 291

Foam proportioning systems are commonly mounted on structural, industrial, wildland, and aircraft rescue and firefighting apparatus, as well as fireboats. The _____ can be used with all Class A foam concentrates and many Class B concentrates. These systems may not be used with alcohol resistant foam concentrates due to the high viscosity of the concentrate. A. Bypass-type balanced pressure proportioners. B. Variable-flow variable-rate direct injection systems. C. Variable-flow demand-type balanced pressure proportioners. D. Around-the-pump proportioners.

Answer 291

B. Variable-flow variable-rate direct injection systems.

Question 292

High-energy foam systems differ from conventional foam system in that they introduce compressed air into the foam solution prior to discharge into the hoseline. These systems are commonly called a compressed-air-foam system (CAFS). A limitation of CAFS is: A. The reach of the fire stream is considerably longer than streams from low-energy systems. B. A CAFS produces uniformly sized, small air bubbles that are very durable. C. Hose reactions can be erratic with a CAFS if foam solution is not supplied to the hoseline insufficient quantities. D. A CAFS provides a safer fire suppression action that allows effective attack on the fire from a greater distance.

Answer 292

C. Hose reactions can be erratic with a CAFS if foam solution is not supplied to the hoseline insufficient quantities.

Question 293

All of the following nozzles may be used with fluoroprotein foam the... exception is: A. Solid bore nozzles. B. Fog nozzles. C. Air aspirating foam nozzles. D. Master stream foam nozzles.

Answer 293

B. Fog nozzles. (Fog nozzles should not be used with fluoroprotein and protein foams, and bc insufficient aspiration occurs shouldn't be used on polar solvent fires.)

Question 294

Determine the total pressure loss due to friction and elevation pressure in 200 feet of 1 3/4 inch hose with 1 1/2 inch couplings, flowing 100 GPM, when the hoseline is operating on the second floor. A. 21 psi. B. 31 psi. C. 36 psi. D. 41 psi.

Answer 294

``` C. 36 psi. ----------------------------------------- FL = (C)(Q)sq(L) + EP= 5(stories -1) FL= (15.5)(1)sq(2) + EP=(5)(2-1) FL = 31 + EP = 5 FL = 31 + 5 FL = 36 psi ```

Question 295

Calculate the total pressure loss due to friction and elevation pressure in 200 feet of 2 1/2 inch hose flowing 200 GPM when the hoseline is operating at the top of a 50 foot incline. A. 21 psi. B. 31 psi. C. 36 psi. D. 41 psi.

Answer 295

``` D. 41 psi. ----------------------------------------- FL=(C)(Q)sq(L) + EP = (0.5)(H) FL=(2)(200/100)sq(200/100) + EP FL=(2)(4)(2) + EP = (0.5)(50) FL=16 + EP = 25 FL = 16 + 25 FL = 41 psi ```

Question 296

A hoseline operating on the 8th floor structural fire is connected to the building standpipe system. What is the total pressure loss due to elevation at the base of standpipe? A. 35 psi. B. 40 psi. C. 45 psi. D. 30 psi.

Answer 296

``` A. 35 psi. ----------------------------------------- EP = (5)(# stories - 1) EP = (5)(8-1) EP = (5)(7) EP = 35 psi ```

Question 297

A structure located at the top of a 75 foothill has a fire on the 4th floor. Determine the total loss of pressure due to elevation. A. 37.5 psi. B. 42.5 psi. C. 47.5 psi. D. 52.5 psi.

Answer 297

``` D. 52.5 psi. ----------------------------------------- EP=(0.5)(H) + EP=(5)(stories-1) EP=(0.5)(75) + EP=(5)(4-1) EP=(37.5) + EP=(15) EP= 37.5 + 15 EP = 52.5 psi ```

Question 298

An engine is pumping through two lines, each 200 feet of 1 3/4 inch (1 1/2 inch couplings) and equipped with 3/4 inch tips operating at 50 PSI nozzle pressure. Determine the total pressure loss due to friction and each hose-line. A. 33 psi. B. 43 psi. C. 53 psi. D. 63 psi.

Answer 298

``` B. 43 psi. ----------------------------------------- GPM=(29.7)(Tsize)sq(sq.rout of NP) GPM=(29.7)(0.75)sq(sq.rt 50) GPM=(29.7)(0.56)(7.07) GPM=117.5 Now plug that GPM into: FL=(C)(Q)sq(L) FL=(15.5)(1.175)sq(2) FL=(15.5)(1.38)(2) FL=42.78 round to 43 FL= 43 psi ```

Question 299

An automatic nozzle will maintain a constant flow pressure of _____ , no matter how much the pump discharge pressure is above this figure. A. 100 psi. B. 90 psi. C. 65 psi. D. 50 psi.

Answer 299

A. 100 psi.

Question 300

Name the equation to find GPM when only tip size is given:

Answer 300

GPM=(29.7)(TipSize)sq(sq.routeNP) Note: Memorize square routes of 50, 80, and 100 since this will be the only NP's likely.

Question 301

1) Name the square route of 50: 2) Name the square route of 80: 3) Name the square route of 100:

Answer 301

1) 7.07 2) 8.94 3) 10

Question 302

The rate of application for firefighting foam varies depending on any one of several variables; the type of foam concentrate use, whether or not the fuel is on fire, type of fuel involved, and whether the fuel is spilled or in a tank. _____ have an application rate of 0.10 to 0.20 GPM/ft squared depending on manufacturing's UL listing would be appropriate for the following scenario. A. Polar solvent fuel spill fires (non-diked) using portable extinguishing equipment. B. Hydrocarbon fuel spill fires (non-diked) using portable extinguishing equipment. C. Hydrocarbon fuel fires in fixed roof storage tanks using portable extinguishing equipment.

Answer 302

A. Polar solvent fuel spill fires (non-diked) using portable extinguishing equipment.

Question 303

The rate of application for firefighting foam varies depending on any one of several variables; the type of foam concentrate use, whether or not the fuel is on fire, type of fuel involved, and whether the fuel is spilled or in a tank. _____ has an application rate for protein and fluoroprotein foams: 0.16 GPM/ft squared for 15 minutes; AFFF and FFFP foams: 0.10 GPM/ft squared for 15 minutes. A. Polar solvent fuel spill fires (non-diked) using portable extinguishing equipment. B. Hydrocarbon fuel spill fires (non-diked) using portable extinguishing equipment. C. Hydrocarbon fuel fires in fixed roof storage tanks using portable extinguishing equipment.

Answer 303

B. Hydrocarbon fuel spill fires (non-diked) using portable extinguishing equipment.

Question 304

The rate of application for firefighting foam varies depending on any one of several variables; the type of foam concentrate use, whether or not the fuel is on fire, type of fuel involved, and whether the fuel is spilled or in a tank. In ______ the application rate is 0.16 GPM/ft squared for all foams. Combustible liquids require a 50-minutes application time; flammable liquids and crude petroleum requires a 65-minutes application time. A. Polar solvent fuel spill fires (non-diked) using portable extinguishing equipment. B. Hydrocarbon fuel spill fires (non-diked) using portable extinguishing equipment. C. Hydrocarbon fuel fires in fixed roof storage tanks using portable extinguishing equipment.

Answer 304

C. Hydrocarbon fuel fires in fixed roof storage tanks using portable extinguishing equipment.

Question 305

The rate of application for firefighting foam varies depending on any one of several variables... the exception is: A. Type of foam concentrate used. B. Whether or not the fuel is on fire. C. Type of fuel (hydrocarbon/polar solvent) involved. D. Whether the fuel is spilled or in a tank; if the fuel is in a tank, the type of tank will not have any bearing on the application rate.

Answer 305

D. Whether the fuel is spilled or in a tank; if the fuel is in a tank, the "type of tank will not have any bearing" on the application rate. (FALSE - "type of tank will have a bearing")

Question 306

The variable-flow demand-type balanced pressure proportioning system, also called a pumped/demand system, is a versatile system. The following are advantages of the variable-flow demand-type balanced pressure proportioning system... the exception is: A. There is no recirculation back to the foam concentrate tank. B. The foam concentrate flow and pressure match system demand. C. The fire pump discharges have ratio controllers, thus pressure drops across the discharge are higher than those on standard pumpers. D. Water and/or foam solution can be discharged simultaneously from any combination of outlets up to read it capacity. E. The system is maintained in a ready-to-pump condition and requires no flushing after use.

Answer 306

C. The fire pump discharges have ratio controllers, thus pressure drops across the discharge are higher than those on standard pumpers. (FALSE - limitation not advantage)

Question 307

A fire is discovered on the 4th floor of the structure. The first arriving engine company proceeds to the 3rd floor of the occupancy and connects four 50 foot sections of 1 3/4 inch (1 1/2 inch) couplings to the standpipe outlet. What is the total pressure loss due to friction and elevation pressure if 125 GPM is flowing? A. 64 psi. B. 54 psi. C. 74 psi. D. 84 psi.

Answer 307

``` A. 64 psi. ----------------------------------------- FL=(C)(Q)sq(L) + EP=(5)(4-1) FL=(15.5)(1.25)sq(2) + EP=15 FL=(15.5)(1.56)(2) + 15 FL= 48.4 + 15 FL= 63.4 psi rounds to 64 psi. ```

Question 308

If 250 GPM is flowing from a nozzle, what is the total pressure loss due to friction for 300 feet of 2 1/2 inch hose? A. 27.5 psi. B. 32.5 psi. C. 37.5 psi. D. 42.5 psi.

Answer 308

``` C. 37.5 psi. ----------------------------------------- FL=(C)(Q)sq(L) FL=(2)(1.25)sq(3) FL=(2)(6.25)(3) FL= 37.5 psi ```

Question 309

A fire is burning in the subbasement of a structure. The first arriving engine company proceeds to the basement and connects 200 feet of 2 1/2 inch hose to the standpipe. Determine the total pressure loss due to friction and elevation pressure at standpipe system connection with 200 GPM flowing. A. 4 psi. B. 6 psi. C. 16 psi. D. 26 psi.

Answer 309

``` B. 6 psi. Note: Subbasement's are -20 feet ----------------------------------------- FL=(C)(Q)sq(L) + EP=(0.5)(H) FL=(2)(2)sq(2) + EP=(0.5)(-20) FL= 16 + (-10) FL = 6 psi ```

Question 310

Master streams require a greater volume of water and do hand lines. If a master stream requires a waterflow greater than the capacity of a single pumper, multiple pumpers maybe used to supply the device. When calculating friction loss for a layout using master stream devices, add _____ to the calculation. A. 10 psi. B. 15 psi. C. 20 psi. D. 25 psi.

Answer 310

D. 25 psi.

Question 311

With a reverse lay, hose is laid from the fire to the water source. A reverse lay is used when the following conditions are present... the exception is: A. When a pumper must first go to the fire location so that a size-up can be made before laying a supply line. B. When the first pump arrives at a fire and must work alone for an extended period of time. C. When the pumper does not carry enough hose to reach from the fire to the nearest water source. D. It is the most expedient way to lay hose if the apparatus that lays the hose must stay at the water source.

Answer 311

C. When the pumper does not carry enough hose to reach from the fire to the nearest water source. (FALSE)

Question 312

Fire hydrants may be color-coded to indicate the flow that can be expected from them. A hydrant that is "Light-blue" in color. A. Class AA - 1,500 GPM or greater. B. Class A - 1,000 - 1,499 GPM. C. Class B - 500 - 999 GPM. D. Class C - Less than 500 GPM.

Answer 312

``` A. Class AA - 1,500 GPM or greater. (Light blue) ________________________________ B. Class A - 1,000 - 1,499 GPM. (Green) C. Class B - 500 - 999 GPM. (Orange) D. Class C - Less than 500 GPM. (Red) ```

Question 313

Fire hydrants may be color-coded to indicate the flow that can be expected from them. A hydrant that is "Green" in color. A. Class AA - 1,500 GPM or greater. B. Class A - 1,000 - 1,499 GPM. C. Class B - 500 - 999 GPM. D. Class C - Less than 500 GPM.

Answer 313

``` B. Class A - 1,000 - 1,499 GPM. (Green) ________________________________ A. Class AA - 1,500 GPM or greater. (Light blue) B. Class A - 1,000 - 1,499 GPM. (Green) C. Class B - 500 - 999 GPM. (Orange) D. Class C - Less than 500 GPM. (Red) ```

Question 314

Fire hydrants may be color-coded to indicate the flow that can be expected from them. A hydrant that is "Orange" in color. A. Class AA - 1,500 GPM or greater. B. Class A - 1,000 - 1,499 GPM. C. Class B - 500 - 999 GPM. D. Class C - Less than 500 GPM.

Answer 314

``` C. Class B - 500 - 999 GPM. (Orange) ________________________________ A. Class AA - 1,500 GPM or greater. (Light blue) B. Class A - 1,000 - 1,499 GPM. (Green) C. Class B - 500 - 999 GPM. (Orange) D. Class C - Less than 500 GPM. (Red) ```

Question 315

Fire hydrants may be color-coded to indicate the flow that can be expected from them. A hydrant that is "Red" in color. A. Class AA - 1,500 GPM or greater. B. Class A - 1,000 - 1,499 GPM. C. Class B - 500 - 999 GPM. D. Class C - Less than 500 GPM.

Answer 315

``` D. Class C - Less than 500 GPM. (Red) ________________________________ A. Class AA - 1,500 GPM or greater. (Light blue) B. Class A - 1,000 - 1,499 GPM. (Green) C. Class B - 500 - 999 GPM. (Orange) D. Class C - Less than 500 GPM. (Red) ```

Question 316

All fire pumps meeting NFPA requirements are rated to pump their capacity at _____ of lift. If the lift is less, the capacity is higher; if the lift is greater, the capacity decreases. A. 30 feet. B. 24 feet. C. 20 feet. D. 10 feet.

Answer 316

D. 10 feet. Note: Maximum lift considered reasonable for most fire pumpers is about 20 feet.

Question 317

Fixed-flow, selective flow, or automatic fog nozzles can be used with foam solution to produce a low-expansion, short lasting foam. These nozzles cannot be used with: A. AFFF. B. FFFP. C. AR-AFFF on hydrocarbon fires. D. Class A foams.

Answer 317

B. FFFP. (Film Forming Fluoroprotein Foam) Note: These nozzles should not be used with protein and fluoroprotein foams bc insufficient of aspiration; they should not be used on polar solvent fires.

Question 318

With respect to foam application, the use of _____ is limited to Class A, compressed-air foam system (CAFS) applications. A. Smoothbore nozzles. B. Fog nozzles. C. Air-aspirating foam nozzles. D. Master stream foam nozzles.

Answer 318

A. Smoothbore nozzles.

Question 319

With respect to foam application, expansion ratios using _____ are between 2:1 and 4:1. Their best application is when used with regular AFFF and Class A foam. May be used with AR-AFFF on hydrocarbon fires, but they should not be used on polar solvent fires. A. Smoothbore nozzles. B. Fog nozzles. C. Air-aspirating foam nozzles. D. Master stream foam nozzles.

Answer 319

B. Fog nozzles.

Question 320

With respect to foam application, _____ are the only type of nozzle that can be used with protein and flouroprotein concentrates. These nozzles may also be used with Class A foams in wildland applications. Provide maximum expansion of the agent, but limited reach. A. Smoothbore nozzles. B. Fog nozzles. C. Air-aspirating foam nozzles. D. Master stream foam nozzles.

Answer 320

C. Air-aspirating foam nozzles.

Question 321

With respect to foam application, _____ are used at large-scale flammable and combustible liquid fires that are beyond the capabilities of hand lines. Large-scale industrial foam apparatus and ARFF vehicles may be equipped with them. A. Smoothbore nozzles. B. Fog nozzles. C. Air-aspirating foam nozzles. D. Master stream foam nozzles.

Answer 321

D. Master stream foam nozzles.

Question 322

A handline equipped with a 1 inch tip smoothbore nozzle flows ____ . ``` A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM. E. 500 GPM. F. 600 GPM. G. 800 GPM. H. 1000 GPM. ```

Answer 322

``` A. 200 GPM. (1' - 50 psi) ________________________________ A. 200 GPM. (1' - 50 psi) B. 250 GPM. (1 1/8 - 50 psi) C. 325 GPM. (1 1/4 - 50 psi) D. 400 GPM. (1 1/4 - 80 psi) E. 500 GPM. (1 3/8 - 80 psi) F. 600 GPM. (1 1/2 - 80 psi) G. 800 GPM. (1 3/4 - 80 psi) H. 1000 GPM. (2' - 80 psi) ```

Question 323

A handline equipped with a 1 1/8 inch tip smoothbore nozzle flows ____ . ``` A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM. E. 500 GPM. F. 600 GPM. G. 800 GPM. H. 1000 GPM. ```

Answer 323

``` B. 250 GPM. (1 1/8 - 50 psi) ________________________________ A. 200 GPM. (1' - 50 psi) B. 250 GPM. (1 1/8 - 50 psi) C. 325 GPM. (1 1/4 - 50 psi) D. 400 GPM. (1 1/4 - 80 psi) E. 500 GPM. (1 3/8 - 80 psi) F. 600 GPM. (1 1/2 - 80 psi) G. 800 GPM. (1 3/4 - 80 psi) H. 1000 GPM. (2' - 80 psi) ```

Question 324

A handline equipped with a 1 1/4 inch tip smoothbore nozzle flows ____ . ``` A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM. E. 500 GPM. F. 600 GPM. G. 800 GPM. H. 1000 GPM. ```

Answer 324

``` C. 325 GPM. (1 1/4 - 50 psi) ________________________________ A. 200 GPM. (1' - 50 psi) B. 250 GPM. (1 1/8 - 50 psi) C. 325 GPM. (1 1/4 - 50 psi) D. 400 GPM. (1 1/4 - 80 psi) E. 500 GPM. (1 3/8 - 80 psi) F. 600 GPM. (1 1/2 - 80 psi) G. 800 GPM. (1 3/4 - 80 psi) H. 1000 GPM. (2' - 80 psi) ```

Question 325

A master stream equipped with a 1 1/4 inch tip smoothbore nozzle flows ____ . ``` A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM. E. 500 GPM. F. 600 GPM. G. 800 GPM. H. 1000 GPM. ```

Answer 325

``` D. 400 GPM. (1 1/4 - 80 psi) ________________________________ A. 200 GPM. (1' - 50 psi) B. 250 GPM. (1 1/8 - 50 psi) C. 325 GPM. (1 1/4 - 50 psi) D. 400 GPM. (1 1/4 - 80 psi) E. 500 GPM. (1 3/8 - 80 psi) F. 600 GPM. (1 1/2 - 80 psi) G. 800 GPM. (1 3/4 - 80 psi) H. 1000 GPM. (2' - 80 psi) ```

Question 326

A master stream equipped with a 1 3/8 inch tip smoothbore nozzle flows ____ . ``` A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM. E. 500 GPM. F. 600 GPM. G. 800 GPM. H. 1000 GPM. ```

Answer 326

``` E. 500 GPM. (1 3/8 - 80 psi) ________________________________ A. 200 GPM. (1' - 50 psi) B. 250 GPM. (1 1/8 - 50 psi) C. 325 GPM. (1 1/4 - 50 psi) D. 400 GPM. (1 1/4 - 80 psi) E. 500 GPM. (1 3/8 - 80 psi) F. 600 GPM. (1 1/2 - 80 psi) G. 800 GPM. (1 3/4 - 80 psi) H. 1000 GPM. (2' - 80 psi) ```

Question 327

A master stream equipped with a 1 1/2 inch tip smoothbore nozzle flows ____ . ``` A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM. E. 500 GPM. F. 600 GPM. G. 800 GPM. H. 1000 GPM. ```

Answer 327

``` F. 600 GPM. (1 1/2 - 80 psi) ________________________________ A. 200 GPM. (1' - 50 psi) B. 250 GPM. (1 1/8 - 50 psi) C. 325 GPM. (1 1/4 - 50 psi) D. 400 GPM. (1 1/4 - 80 psi) E. 500 GPM. (1 3/8 - 80 psi) F. 600 GPM. (1 1/2 - 80 psi) G. 800 GPM. (1 3/4 - 80 psi) H. 1000 GPM. (2' - 80 psi) ```

Question 328

A master stream equipped with a 1 3/4 inch tip smoothbore nozzle flows ____ . ``` A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM. E. 500 GPM. F. 600 GPM. G. 800 GPM. H. 1000 GPM. ```

Answer 328

``` G. 800 GPM. (1 3/4 - 80 psi) ________________________________ A. 200 GPM. (1' - 50 psi) B. 250 GPM. (1 1/8 - 50 psi) C. 325 GPM. (1 1/4 - 50 psi) D. 400 GPM. (1 1/4 - 80 psi) E. 500 GPM. (1 3/8 - 80 psi) F. 600 GPM. (1 1/2 - 80 psi) G. 800 GPM. (1 3/4 - 80 psi) H. 1000 GPM. (2' - 80 psi) ```

Question 329

A master stream equipped with a 2 inch tip smoothbore nozzle flows ____ . ``` A. 200 GPM. B. 250 GPM. C. 325 GPM. D. 400 GPM. E. 500 GPM. F. 600 GPM. G. 800 GPM. H. 1000 GPM. ```

Answer 329

``` H. 1000 GPM. (2' - 80 psi) ________________________________ A. 200 GPM. (1' - 50 psi) B. 250 GPM. (1 1/8 - 50 psi) C. 325 GPM. (1 1/4 - 50 psi) D. 400 GPM. (1 1/4 - 80 psi) E. 500 GPM. (1 3/8 - 80 psi) F. 600 GPM. (1 1/2 - 80 psi) G. 800 GPM. (1 3/4 - 80 psi) H. 1000 GPM. (2' - 80 psi) ```

Question 330

A master stream smoothbore tip _____ inches at 80 psi flows 1000 GPM. ``` A. 1 B. 1 1/8 C. 1 1/4 D. 1 3/8 E. 1 1/2 F. 1 3/4 G. 2 ```

Answer 330

``` G. 2 (1000 GPM @ 80 psi) ________________________________ A. 1 (200 GPM @ 50 psi) B. 1 1/8 (250 GPM @ 50 psi) C. 1 1/4 (325 GPM @ 50 psi & 400 GPM @ 80 psi) D. 1 3/8 (500 GPM @ 80 psi) E. 1 1/2 (600 GPM @ 80 psi) F. 1 3/4 (800 GPM @ 80 psi) G. 2 (1000 GPM @ 80 psi) ```

Question 331

A master stream smoothbore tip _____ inches at 80 psi flows 800 GPM. ``` A. 1 B. 1 1/8 C. 1 1/4 D. 1 3/8 E. 1 1/2 F. 1 3/4 G. 2 ```

Answer 331

``` F. 1 3/4 (800 GPM @ 80 psi) ________________________________ A. 1 (200 GPM @ 50 psi) B. 1 1/8 (250 GPM @ 50 psi) C. 1 1/4 (325 GPM @ 50 psi & 400 GPM @ 80 psi) D. 1 3/8 (500 GPM @ 80 psi) E. 1 1/2 (600 GPM @ 80 psi) F. 1 3/4 (800 GPM @ 80 psi) G. 2 (1000 GPM @ 80 psi) ```

Question 332

A master stream smoothbore tip _____ inches at 80 psi flows 600 GPM. ``` A. 1 B. 1 1/8 C. 1 1/4 D. 1 3/8 E. 1 1/2 F. 1 3/4 G. 2 ```

Answer 332

``` E. 1 1/2 (600 GPM @ 80 psi) ________________________________ A. 1 (200 GPM @ 50 psi) B. 1 1/8 (250 GPM @ 50 psi) C. 1 1/4 (325 GPM @ 50 psi & 400 GPM @ 80 psi) D. 1 3/8 (500 GPM @ 80 psi) E. 1 1/2 (600 GPM @ 80 psi) F. 1 3/4 (800 GPM @ 80 psi) G. 2 (1000 GPM @ 80 psi) ```

Question 333

A master stream smoothbore tip _____ inches at 80 psi flows 500 GPM. ``` A. 1 B. 1 1/8 C. 1 1/4 D. 1 3/8 E. 1 1/2 F. 1 3/4 G. 2 ```

Answer 333

``` D. 1 3/8 (500 GPM @ 80 psi) ________________________________ A. 1 (200 GPM @ 50 psi) B. 1 1/8 (250 GPM @ 50 psi) C. 1 1/4 (325 GPM @ 50 psi & 400 GPM @ 80 psi) D. 1 3/8 (500 GPM @ 80 psi) E. 1 1/2 (600 GPM @ 80 psi) F. 1 3/4 (800 GPM @ 80 psi) G. 2 (1000 GPM @ 80 psi) ```

Question 334

A master stream smoothbore tip _____ inches at 80 psi flows 400 GPM. ``` A. 1 B. 1 1/8 C. 1 1/4 D. 1 3/8 E. 1 1/2 F. 1 3/4 G. 2 ```

Answer 334

``` C. 1 1/4 (325 GPM @ 50 psi & 400 GPM @ 80 psi) ________________________________ A. 1 (200 GPM @ 50 psi) B. 1 1/8 (250 GPM @ 50 psi) C. 1 1/4 (325 GPM @ 50 psi & 400 GPM @ 80 psi) D. 1 3/8 (500 GPM @ 80 psi) E. 1 1/2 (600 GPM @ 80 psi) F. 1 3/4 (800 GPM @ 80 psi) G. 2 (1000 GPM @ 80 psi) ```

Question 335

A handline equipped with a smoothbore tip _____ inches at 50 psi flows 325 GPM. ``` A. 1 B. 1 1/8 C. 1 1/4 D. 1 3/8 E. 1 1/2 F. 1 3/4 G. 2 ```

Answer 335

``` C. 1 1/4 (325 GPM @ 50 psi & 400 GPM @ 80 psi) ________________________________ A. 1 (200 GPM @ 50 psi) B. 1 1/8 (250 GPM @ 50 psi) C. 1 1/4 (325 GPM @ 50 psi & 400 GPM @ 80 psi) D. 1 3/8 (500 GPM @ 80 psi) E. 1 1/2 (600 GPM @ 80 psi) F. 1 3/4 (800 GPM @ 80 psi) G. 2 (1000 GPM @ 80 psi) ```

Question 336

A handline equipped with a smoothbore tip _____ inches at 50 psi flows 250 GPM. ``` A. 1 B. 1 1/8 C. 1 1/4 D. 1 3/8 E. 1 1/2 F. 1 3/4 G. 2 ```

Answer 336

``` B. 1 1/8 (250 GPM @ 50 psi) ________________________________ A. 1 (200 GPM @ 50 psi) B. 1 1/8 (250 GPM @ 50 psi) C. 1 1/4 (325 GPM @ 50 psi & 400 GPM @ 80 psi) D. 1 3/8 (500 GPM @ 80 psi) E. 1 1/2 (600 GPM @ 80 psi) F. 1 3/4 (800 GPM @ 80 psi) G. 2 (1000 GPM @ 80 psi) ```

Question 337

A handline equipped with a smoothbore tip _____ inches at 50 psi flows 200 GPM. ``` A. 1 B. 1 1/8 C. 1 1/4 D. 1 3/8 E. 1 1/2 F. 1 3/4 G. 2 ```

Answer 337

``` A. 1 (200 GPM @ 50 psi) ________________________________ A. 1 (200 GPM @ 50 psi) B. 1 1/8 (250 GPM @ 50 psi) C. 1 1/4 (325 GPM @ 50 psi & 400 GPM @ 80 psi) D. 1 3/8 (500 GPM @ 80 psi) E. 1 1/2 (600 GPM @ 80 psi) F. 1 3/4 (800 GPM @ 80 psi) G. 2 (1000 GPM @ 80 psi) ```