App Tech > Hydraulics > Flashcards

Hydraulics Flashcards

(97 cards)

Study These Flashcards
1
Q

how many cubic inches in one cubic foot

A

1728 inches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

how many gallons in one cubic foot

A

7.5 gallons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

how much does one cubic foot of fresh water weigh

A

62.5 pounds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

how many cubic inches in one gallon

A

231 cubic inches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

how much does one gallon of fresh water weigh

A

8.33 pounds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

how much pressure does a 1 foot column of water exert at its base

A

.434 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

how much pressure does a 2.304 foot column of water exert at its base

A

1 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

how many gallons does 50 foot length of 1.75 inch hose contain

A

6.24 gallons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

how many gallons does 50 foot length of 1.88 inch hose contain

A

7.2 gallons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

how many gallons does 50 foot length of 2.5 inch hose contain

A

12.74 gallons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

how many gallons does 50 foot length of 3 inch hose contain

A

18.35 gallons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

how many gallons does 100 foot length of 4 inch hose contain

A

65.25 gallons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

how many gallons does 100 foot length of 5 inch hose contain

A

101.94 gallons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

nozzle pressure for hand lines with smooth bore nozzles

A

50 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

nozzle pressure for hand lines with smooth bore nozzles for higher flow

A

65 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

nozzle pressure for master streams with smooth bore nozzles

A

80 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

nozzle pressure for master streams with smooth bore nozzles for higher flow

A

100 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

akron assault nozzles are designed for ___ nozzle pressure and flows ___ with the fog nozzle

A

50 psi and 175 gpm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

akron assault nozzles are designed for ___ nozzle pressure and flows ___ with the 15/16 inch slug

A

50 psi and 185 gpm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

type of pump that takes advantage of incoming water pressure

A

centrifugal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

type of pump that water enters the eye and then travels through one or more impellars

A

centrifugal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

formula for volume of a rectangular or square shaped container

A

L x W x D x 7.5 (gallons in a cubic foot of water)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

formula for volume of a cylinder, pipe, or hose

A

3.14 x r^2 x H (or L) x 7.5 (gallons in a cubic foot of water)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

formula for flow from a smooth bore nozzle in gpm

A

gpm = 29.7 x d^2 x (sq. root of NP (nozzle pressure))

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
theoretical gpm for handline with ___ tip
``` 1/2 inch @ 53 7/8 inch @ 161 15/16 inch @ 185 1 inch @ 210 1 and 1/8 inch @ 266 1 and 1/4 inch @ 328 ```
26
fire ground gpm's for handlines with smoothbore tip
``` 1/2 inch @ 50 7/8 inch @ 150 15/16 inch @ 185 1 inch @ 200 1 and 1/8 inch @ 250 1 and 1/4 inch @ 325 ```
27
theoretical gpm for master stream with ___ tip
``` 1 and 1/4 inch @ 415 1 and 3/8 inch @ 502 1 and 1/2 inch @ 598 1 and 3/4 inch @ 814 2 inch @ 1062 ```
28
fireground gpm for master stream with ___ tip
``` 1 and 1/4 inch @ 400 1 and 3/8 inch @ 500 1 and 1/2 inch @ 600 1 and 3/4 inch @ 800 2 inch @ 1000 ```
29
1 inch adjustable gallonage fog nozzle can flow ___
12-60 gpm
30
1 and 1/2 inch akron assault nozzle flows ___
175 gpm
31
2 and 1/2 inch akron fog nozzle can flow ___
125-250 gpm
32
akron quick attack mercury monitor flows ___
500 gpm
33
master stream fog nozzles can flow ___
150-2000 gpm
34
booster reels are generally what length and diameter
150 feet and 1 inch
35
booster reels generally can flow ___ with ___ nozzle pressure
12-60 gpm and 100 psi
36
forestry hose comes in ___ and ___ sections
50 foot and 100 foot
37
forestry hose with 1 inch adjustable gallonage fog nozzle can flow ___ @ ___ psi
12-60 gpm @ 100 psi
38
forestry hose with red fog nozzle flows ___ @ ___psi
22 gpm @ 100 psi
39
decon showers flow ___ @ ___ psi
270 gpm @ 75 psi
40
piercing nozzles flow ___ @ ___ psi
125 gpm @ 100 psi
41
2 and 1/2 inch distributor nozzle flows ___ @ ___ psi
250 gpm @ 100 psi
42
1 and 1/2 inch distributor nozzle flows ___ @ ___ psi
95 gpm @ 50 psi
43
2 and 1/2 inch cellar nozzle flows ___ @ ___ psi
350 gpm @ 100 psi
44
1 and 1/2 inch cellar nozzle flows ___ @ ___ psi
160 gpm @ 100 psi
45
fixed monitor with smooth bore break away nozzle has what ___ tip with ___ flow @ ___ psi
1 and 3/8 inch flows 500 gpm @ 110 psi 1 and 1/2 inch flows 600 gpm @ 110 psi 1 and 3/4 inch flows 800 gpm @ 110 psi 2 inch flows 1000 gpm @ 120 psi
46
fixed monitor with task force tip automatic nozzle flows ___ @ ___ psi
500 gpm @ 90 psi 750 gpm @ 110 psi 1000 gpm @ 120 psi 1250 gpm @ 140 psi
47
fixed monitor with akron adjustable flow nozzle flows ___ @ ___ psi
500 gpm @ 100 psi 750 gpm @ 110 psi 1000 gpm @ 130 psi 1250 gpm @ 140 psi
48
fairfax county uses the ___ as its portable monitor
akron quick attack mercury monitor
49
akron quick attack monitor with smoothbore has ___ tip with ___ nozzle pressure
1 and 3/8 inch and 80 psi
50
akron quick attack monitor with fog nozzle requires ___ nozzle pressure
100 psi
51
akron quick attack monitor should use what size hose to supply
3 inch
52
maximum inlet pressure for akron quick attack monitor
150 psi
53
appliance loss for akron quick attack monitor
10 psi
54
combination monitor with smooth bore nozzle can flow ___ @ ___ nozzle pressure
500-1000 gpm @ 80 psi
55
combination monitor with fog nozzle can flow ___ @ ___ nozzle pressure
350-1250 @ 100 psi
56
1st principle of friction loss
double the length of hose, doubles the friction loss
57
2nd principle of friction loss
if flow rate is doubled then friction loss will be 4 times greater
58
3rd principle of friction loss
friction loss varies inversely to the fifth power as the diameter of the hose friction loss decreases with increase in diameter of hose
59
4th principle of friction loss
higher velocity to move same amount of water through smaller diameter hose increasing pump pressure will overcome friction loss to have correct nozzle pressure
60
friction loss coefficients
``` 1 inch = 150 1 and 3/4 inch = 10 2 inch = 8 2 and 1/2 inch = 2 3 inch = .8 3 and 1/2 inch = .34 4 inch = .2 5 inch = .08 ```
61
formula for friction loss
FL = C x Q^2 x L
62
at what gpm do you need to add 10 psi for appliance loss
350 gpm
63
what appliances do you add 25 psi
ladder pipes master streams except monitor standpipes
64
how many psi for elevation pressure do you add per 10 feet of height up
4.34
65
what is the minimum safe pdp during normal operations
250 psi
66
national foam js10 air aspirating nozzle is rated for ___ @ ___ psi
100 gpm @ 100 psi
67
fairfax county portable foam eductors flow ___ gpm with pressure of ___ psi at the eductor
95 to 125 gpm @ 200 psi
68
foam eductor must be placed ___ feet from the pump panel and within ___ feet of the nozzle
50 feet and 200 feet
69
when flowing foam, nozzle should be no more than ___ feet above the eductor
5 feet
70
what type of foam system is the akron truck mount
bypass proportioning system
71
what type of foam system is the waters around the pump proportioner
around the pump system
72
what psi to pump inline educator at
200 psi
73
what type of foam system is the husky foam system
electronic direct injection foam system
74
what psi for electronic direct inject foam system
150 psi
75
minimum gallons of foam on Fairfax County pumper
40 gallons
76
which Fairfax County pumpers are equipped with cafs
412, 416, 420, 441
77
what is the breakdown of cafs for fire attack
2/3 water and 1/3 air with a foam application rate of .3%
78
what is breakdown of cafs for overhaul
2/3 air and 1/3 water with a foam application rate of .5%
79
for cafs, amount of water needed to create and effective stream is decreased by ___ %
25%
80
Fairfax County cafs pumpers can flow foam from which 5 discharges
leader line blitz line both cross lays bumper lines
81
how long can cafs air compressor be operated without overheating
2 hours
82
pierce recommends that cafs only be used for lines up to ___ feet in length
250 feet
83
minimum starting pressure for 4 inch supply lines in relay operations
50 psi
84
minimum starting pressure for 3 inch supply lines in relay operations
100 psi
85
minimum starting pressure for combination of 3 and 4 in supply line in relay operations
100 psi
86
formula for pump discharge in relay ops
PDP = RP+TPL
87
formula to calculate proper pressure for maximum flow
static hydrant pressure + 150 psi
88
friction loss for multiple supply lines
two 3 inch lines = .2 one 4 inch line and one 3 inch line = .09 two 4 inch lines = .05
89
calculating available water from hydrant
percentage drop = (SP-RP) 100 / SP
90
initial pressure for standpipe
150 psi
91
what goes into calculating pdp for standpipes
``` nozzle pressure friction loss in attack line 25 psi for appliance loss in standpipe friction loss in supply to fdc height of attack line above pumper ```
92
starting pdp for sprinkler systems
150 psi
93
starting pdp for combination standpipe and sprinkler systems
150 psi
94
elevated master streams need these 4 factors to determine correct pdp for aerial device
nozzle pressure 25 psi for appliance loss in aerial device elevation pressure ( nozzle height) friction loss in hose between pumper and aerial device
95
starting pressure for all aerial devices
150 psi
96
smooth bore nozzle reaction formula
NR = 1.57 x d^2 x NP
97
fog stream nozzle reaction formula
.0505 x Q x sq root NP
App Tech
flashcards
Decks in class (11)
# Cards
Brainscape helps you reach your goals faster, through stronger study habits.
© 2026 Bold Learning Solutions. Terms and Conditions