Power tools

Question 1

Circular saws

Answer 1

trennschleifers

Question 2

Stihl TS-360

Answer 2

1. 3.68 cuin 2 stroke motor2. 50:1 fuel ratioa. One gallon + 2.5oz of oil = 51.2/1 ratiob. Good enough3. Fuel capacity 1.2 pts (19oz)4. Max RPM 5000 (blade speed)5. Cutting depth 3.9in (with new blade)6. Weighs 22.9lbs without blade7. V-belt tension = 3/16-3/8in

Question 3

Stihl TS-400

Answer 3

1. Replacing the 3602. 12 or 14in blade3. 3.9 cuin 2 stroke motor4. 50:1 fuel ratioa. One gallon + 2.5oz of oil = 51.2/1 ratiob. Good enough5. Fuel capacity 1.39 pts (22.2oz)6. Max RPM 5350 (blade speed)7. Cutting depth 4.9in (with new 14in blade)8. Weighs 22.9lbs without blade9. V-belt tension = 3/16-3/8in

Question 4

Stihl TS-460

Answer 4

1. Replacing the 3602. 12 or 14in blade 3. 4.42 cuin 2 stroke motor4. 50:1 fuel ratioa. One gallon + 2.5oz of oil = 51.2/1 ratiob. Good enough5. Fuel capacity 2.1 pts (33.4oz)6. Max RPM 5350 (blade speed)7. Cutting depth 4.9in (with new 14in blade)8. Wieghs 23.5lbs without blade9. Automatic belt tensioning

Question 5

Stihl TS-420

Answer 5

1. Replacing the 3602. 12 or 14in blade3. 4.07 cuin 2 stroke motor4. 50:1 fuel ratioa. One gallon + 2.5oz of oil = 51.2/1 ratiob. Good enough5. Fuel capacity 0.71 L (24oz)6. Max RPM 5350 (blade speed)7. Cutting depth 4.9in (with new 14in blade)8. Weighs 22.3lbs without blade9. Automatic belt tensioning

Question 6

Chainsaws

Answer 6

motosäges

Question 7

Stihl 29

Answer 7

1. 3.3 cuin 2 stroke engine2. 50/1 fuel ratio3. 1.2pts (19.2oz) fuel capacity4. Weighs 13lbs without bar or chain5. 20in bar, 72 links, 36 carbide tipped teeth, single rake chain6. Replace when 1/3rd of teeth are missing, i.e. 12

Question 8

Stihl MS 310

Answer 8

1. Replaces 292. 3.6 cuin 2 stroke engine3. 50/1 fuel ratio4. 1.2pt (19.2oz) fuel capacity5. Weighs 13lbs without bar or chain6. 20in bar, 72 links, 36 carbide tipped teeth, single rake chain7. Replace when 1/3rd of teeth are missing, i.e. 12

Question 9

Stihl MS 460

Answer 9

1. 4.67 cuin 2 stroke engine2. 50/1 fuel ratio3. 1.69pt (27.1oz) fuel capacity4. Weighs 15.4lbs without bar or chain5. 20in bar, 72 links, 36 carbide tipped teeth, single rake chain6. Replace when 1/3rd of teeth are missing, i.e. 12

Question 10

Stihl MS 660

Answer 10

1. 5.6 cuin 2 stroke engine2. 50/1 fuel ratio3. 1.74pt (27.8oz) fuel capacity4. Weighs 16.5lbs without bar or chain5. 36in bar, 96 links, 48 carbide tipped teeth, single rake chain6. Replace when 1/3rd of teeth are missing, i.e. 167. Found on Ladder 1

Question 11

Good! I finally know all the saws.

Answer 11

There may be other saws in service. Know your truck above all!!!

Question 12

What is the goal of using the power tools?

Answer 12

To become safe and proficient in the power tools that TFD routinely uses.

Question 13

Four stroke engines

Answer 13

i. Can be unleaded or diesel
ii. Takes four strokes to complete each cycle
iii. Primarily used on generators and gas powered fans

Question 14

What are the four strokes?

Answer 14

Intake stroke
1. Piston moves down to draw in fuel air mixture from intake valve
Compression
1. Piston moves up as valves shut, compressing the fuel air mixture
2. At the apex, the spark plug fires
Power stroke
1. Explosion forces piston down generating power
Exhaust
1. Exhaust valve opens as piston rises, forcing out exhaust

Question 15

Two stroke engines

Answer 15

i. Requires gasoline mixed with oil as it lacks an oil pan
ii. Takes two strokes to complete each cycle
iii. Found on circular saws and chain saws
iv. Combines strokes into intake/exhaust & compression and intake/exhaust & power

Question 16

What are the two strokes?

Answer 16

v. Upstroke
1. Air/fuel compressed generating heat, at the apex, the spark plug fires
vi. Down stroke
1. Whenever the piston moves down, waste gases are pushed out and the resulting vacuum sucks in new fuel air mixture

Question 17

Our responsibility with regards to power saws

Answer 17

Our responsibility: Be able to identify the refueling, starting, operating, and safety procedures for the cabin and rotary saws utilized by TFD and know in detail the specifications for saws that are in the equipment cache of the PSA

Question 18

Uses for power saws

Answer 18

i. Ventilation
ii. Forcible Entry
iii. Extrication
iv. Building collapse

Question 19

Locations of powersaws

Answer 19

i. Ladder trucks
1. With the wind and downhill, they make maybe 4mpg of diesel
ii. Ladder tenders
iii. Heavy Rescue 04 @ Grant and I10
iv. Engines

Question 20

Blades for circular saws

Answer 20

Rescue
Steel Carbide tipped
Composite blade

Question 21

Blade safety

Answer 21

No sideload!
No stop blade rotation by sticking into something!
No cut above shoulder height!
No trim nails with saws!

Question 22

Rescue blade stats

Answer 22

a. Can cut concrete, brick, masonry block, wood, steel, iron, glass, plastic, wood
b. Steel core with industrial grade diamonds vacuum-brazed to the edge
c. Max operating speed = 5400rpm
d. Weighs 6lbs
e. Water cooleable
f. Primary blade on all engines, ladders and LTs.

Question 23

Rescue blade useage

Answer 23

g. Spin in direction of arrow, keeping RPMs high so it doesn’t bog down the cut, and keeping the blade straight to prevent side-loading
h. When cutting soft materials, the blade may glaze up. If that happens, cut briefly into something hard (concrete, brick, asphalt, etc) to deglaze them
i. For hurricane or safety glass, use high RPM for fastest cut

Question 24

Steel carbide tipped blade stats

Answer 24

a. Used for cutting wood and non-ferrous metals
b. Tips can break off
c. Replace when 1/3rd tips are missing
d. Run at full throttle prior to contacting surface

Question 25

Composite Blade stats

Answer 25

a. Fiberglass and epoxy impregnated with abrasive material b. Used for cutting steel, concrete and masonry c. 12in diameter blades when new, replace when 8in diameter d. Must read label correctly to ID blade type e. 3.9in cutting depth with a new blade

Question 26

Composite Blade useage

Answer 26

f. Should be turning at idle when contacting work surface g. Blotters should be used to avoid vibrations from saw to blade h. Keep away from petroleum if possible as this damages the blade

Question 27

Blade changing

Answer 27

1. Engine off 2. Proper tools for saw 3. ID the saw and blade in need of work 4. Engage spindle locks and lock it 5. Remove bolt, thrust washer, and blade 6. Replace blade, reinstall washer correctly and tighten 7. Check blade

Question 28

Starting circular

Answer 28

1. Switch to ‘on’ 2. Pull out choke button to close choke 3. Lock trigger hatch 4. Left hand on handle bar, right foot on rear handle 5. Clear front and behind 6. Grab cord, ensuring that starter pawls are engaged 7. Quick short pulls to burp it 8. Disengage trigger latch and open choke 9. Avoid flooding engine 10. To turn off, switch to off, and make sure you control blade until it has fully stopped.

Question 29

How chainsaws work

Answer 29

1. Chainsaws have a centrifugal clutch that operates the rotation of the chain. When the saw is at idle, a spring keeps the clutch shoe from rotating the sprocket drum. 2. As the crankshaft turns faster and faster, the clutch shoe overcomes the spring by centrifugal force, grabbing the sprocket drum and rotating the chain.

Question 30

Chainsaw can cut through.....

Answer 30

1. wood sheeting, asphalt shingles and sheets, fiberboard and foam board under layment, thin nonferrous metals. 2. Will not cut masonry tiles, concrete, heavy metal sheeting, metal bars/pipes/supports, rock or clay roofing materials

Question 31

Operating a saw

Answer 31

3. Clear area of bystanders and start saw 4. Brace feet wide apart on parallel line to cut 5. Bring up to full throttle 6. Cut at a 45 degree angle 7. Keep roller tip through material 8. Cut along desired line, maintaining depth and angle 9. Beware that kickback might happen when the tip makes contact with materials being cut!

Question 32

Safety for using saws (loooooooots of stats)

Answer 32

i. Wear PPE ii. Keep both hands on the saw iii. Be safe while fueling iv. Watch out for sparking v. Examine cutting wheel/teeth before each use vi. Never operate without guard in place vii. Never cut above shoulder height viii. Never side load ix. Operate outdoors or wear SCBA x. Handle abrasive wheels carefully xi. Make sure the blade is rated to that RPM xii. Make sure blade/chain has stopped spinning when finished xiii. Cuts should be made at full throttle unless using a composite blade xiv. Do not carry circular saw with engine running xv. Beware of kickback xvi. Positon your body out of the path of the saw blade xvii. Check blade/chain tension

Question 33

Generators fuel types

Answer 33

a. Portable are four cylinder gas powered engines | b. Rig mounted are diesel

Question 34

Homelite 2500

Answer 34

Five HP Briggs and Stratton engine 2300 watts 120 volts 19.2 amps

Question 35

Honda Multiquip

Answer 35

i. 4HP Honda engine ii. 2300 watt capacity iii. 120 volts iv. 19.2 amps

Question 36

Generators are used for.....

Answer 36

i. Smoke ejectors ii. Lights –halogen iii. Water vacuums

Question 37

Generator equipment

Answer 37

i. Electric cord reels (50 ft.) ii. Junction boxes iii. Pigtails 18’-24’, household adaptors, 3 prong 1/4th turn twist locks (adaptors) iv. Lights, smoke ejectors, water vacuums, etc. 1. Lights range from 300, 500, 750 or 1000 watt

Question 38

Watts and amps stats

Answer 38

i. If it has watt rating on it, use that. Plug in the higher demand item first, and then subtract to see the available watts. ii. If amp, use formula to figure out available slots 1. Amp = generator output in watts/120 volts iii. Never start under load

Question 39

Starting generators

Answer 39

i. Check fuel and oil ii. Open fuel petcock iii. Turn on engine iv. Close choke when cold starting v. Engage starter pawls and pull vi. Once it burps or tries to start, open choke vii. Do not use in occupancies due to exhaust

Question 40

Fans

Answer 40

a. Located on all engines, Ladders, and LTs b. Used to reduce heat and smoke in a structure c. Pull, push, pressurize, and venture air d. Ventilate confined spaces or disperse vapors

Question 41

Electric Smoke ejectors

Answer 41

i. 750-1000 watts ii. 16in blade will move 5200 cuft/min iii. 20in blade will move 9500 cuft/min iv. Advantages – lighters, no emmissions, simple to operate, will work in oxygen deficient environement v. Found on ladders/LT might need generator

Question 42

Description plate on top of fan says "P 164 SE"

Answer 42

2. Portable 3. 16in blade length 4. 4 blades 5. Square 6. Explosion proof

Question 43

Gas powered smoke ejectors

Answer 43

i. Four stroke gas powered Honda engine ii. 4-5.5 HP iii. Unleaded gas iv. 2-7 blades (laminated hardrock maple or metal) v. Rated at 10,000-20,000 CFM vi. Fan speed adjustable with throttle vii. Should not be used inside structure viii. If needed, use exhaust extender for outside structure.