TOOLS 24 - CHAIN SAW OPERATIONS Flashcards Preview

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Flashcards in TOOLS 24 - CHAIN SAW OPERATIONS Deck (41):
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CHAIN SAW OPERATIONS

POLICY

Except for _____________ operations, the chain saw is not to be used for the ventilation or overhauling of structural fires

PIER FIRE

Except for pier fire operations, the chain saw is not to be used for the ventilation or overhauling of structural fires.

1

CHAIN SAW OPERATIONS

GENERAL RULES

In the starting stance, keep your body to the ________ of the chain and never ________ the saw or _______ across the chain.

In the starting stance, keep your body to the LEFT of the chain and never STRADDLE the saw or LEAN across the chain.

2

CHAIN SAW OPERATIONS

GENERAL RULES

In the starting stance, what are the hand positions?

Left hand - hold the handlebar on top behind the hand guard

Right hand - pull starter grip straight up

3

CHAIN SAW OPERATIONS

GENERAL RULES

In the operating stance, which arm is kept in the "straight arm" position?

LEFT ARM

Left arm kept in "straight arm" position to withstand any kickback force

4

CHAIN SAW OPERATIONS

GENERAL RULES

In the operating stance, the body is alway kept to the ________ of the chain.

LEFT

In the operating stance, the body is always kept to the LEFT of the chain.

5

CHAIN SAW OPERATIONS

GENERAL RULES

TRUE/FALSE

A member using the saw is allowed to lightly overextend as long as they maintain balance and my cut objects above chest high.

FALSE

- Do not overextend or cut while off balance.

- Do not attempt cutting above chest height.

6

CHAIN SAW OPERATIONS

GENERAL RULES

At what speed should the saw be running before allowing the chain to touch the wood?

FULL SPEED

- Hold saw near log and throttle up to full speed just before allowing chain to touch wood.

7

CHAIN SAW OPERATIONS

GENERAL RULES

When operating on slopes, the chain saw operator must always stand on the ________ side of the tree/log when cutting.

UPHILL

When operating on slopes, the chain saw operator must always stand on the UPHILL side of the tree/log when cutting.

8

CHAIN SAW OPERATIONS

GENERAL RULES

Start cuts with "bumper spike" against the wood and keep it there. Let the chain saw do the cutting. While firmly holding the saw, use the bumper spike for leverage as you slowly rock the saw in upward motions.

TRUE

9

CHAIN SAW OPERATIONS

GENERAL RULES

When does the operator release the throttle trigger of the chainsaw?

The moment the chain breaks clean of the object.

10

CHAIN SAW OPERATIONS

GENERAL RULES

What is pull-in?

Pull-in is when the chain on the bottom of the bar is suddenly stopped (by being pinched), the reaction of the saw pulls the chain forward and may cause the operator to lose balance.

11

CHAIN SAW OPERATIONS

GENERAL RULES

When does pull-in occur?

- frequently occurs when the bumper spike is not held securely against the tree or limb.

- chain is not rotating at full speed when it comes in contact with wood.

12

CHAIN SAW OPERATIONS

GENERAL RULES

How do you avoid pull-in?

- always start cut with chain running at full speed and bumper spikes in contact with the wood

- uses wedges to open the kerf or cut

13

CHAIN SAW OPERATIONS

GENERAL RULES

What is pushback and when does it occur?

- cutting the underside of a log or limb with the top side of the chain, the tip will be pushed out towards the operator

- the top of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood.

14

CHAIN SAW OPERATIONS

GENERAL RULES

How does the operator compensate for pushback?

To compensate for this force, keep your left arm stiff and maintain constant pressure against log with the saw. Release the throttle trigger immediately after chain breaks clean.

15

CHAIN SAW OPERATIONS

GENERAL RULES

Tips to avoiding pushback?

- be alert to forces and situations that may pinch top of chain

- do not cut more than one log at a time

- do not twist the saw when withdrawing from an underbuck cut because the chain can pinch

16

CHAIN SAW OPERATIONS

GENERAL RULES

What does the "kerf" refer to?

The kerf is the space left behind the cutting blade as it cuts

17

CHAIN SAW OPERATIONS

SAW OPERATIONS

How big a radius is the circle of danger and who is allowed to operate within it?

10ft radius

The saw operator and control person will be the only personnel in this area during cutting.


**Officer is to monitor conditions and relay orders received from the officer in command. If possible, officer is positioned as to permit visual contact with the control person.**

18

CHAIN SAW OPERATIONS

SAW OPERATIONS

Where is the positioning of the control man during saw operations?

- The control member should be positioned as to permit easy visual contact with the operator maintaining a safe distance from the saw.

- The control member must maintain a sufficient distance, from the member using the saw, as to prevent any possible contact with the saw. The possibility of kickback or movement of the operator must be taken into consideration.

- If possible, this member is to maintain a visual contact with the officer.

19

CHAIN SAW OPERATIONS

SAW OPERATIONS

Members outside the circle of danger are to be deployed as required, what are some of their duties?

- monitoring incident for changing condition

- relief

- assist in refueling

- pedestrian and crowd control

20

CHAIN SAW OPERATIONS

SAW OPERATIONS

Where is the saw refueling area locating?

Outside the circle of danger

21

CHAIN SAW OPERATIONS

SAW OPERATIONS

What are the two reasons the officer must rotate members in saw cutting operations?

- reduce individual exposure to high noise levels

- prevent operator fatigue.

22

CHAIN SAW OPERATIONS

OPERATION PRECAUTIONS

TRUE/FALSE

Members must secure an object that has fallen against a structure before cutting it.

FALSE

- Do not attempt cutting an object which has fallen against a structure and is now supported by it.

- If a branch, tree section or other object is hanging, leaning or otherwise damaged members are to prevent access to the danger area by unauthorized persons. If practical, the object should be stabilized by lashing or shoring. The cutting down of it is not to be attempted

23

CHAIN SAW OPERATIONS

OPERATION PRECAUTIONS

Trees are ________ conductors of electricity.

GOOD

Trees are GOOD conductors of electricity.

24

CHAIN SAW OPERATIONS

OPERATION PRECAUTIONS

Where is the most dangerous kickback zone located on the saw?

Upper 90 degree quadrant

25

CHAIN SAW OPERATIONS

OPERATION PRECAUTIONS

A ________ chain saw is an extremely dangerous tool.

DULL

A DULL chainsaw is an extremely dangerous tool.

26

CHAIN SAW OPERATIONS

CUTTING VARIATIONS

What is a rip cut?

A rip cut is when you cut straight down on the overhanging end of a log (past the fulcrum point).

27

CHAIN SAW OPERATIONS

CUTTING VARIATIONS

How do you cut wood that is supported on both ends (2 fulcrum points)?

1 - If practical, support wood on both sides of cut near the planned location and make a rip cut

Or

2 - Cut 1/2 - 3/4" of the diameter downward, Finish cut by cutting upward the remaining portion.

28

CHAIN SAW OPERATIONS

CUTTING VARIATIONS

What is limbing?

Limbing is the removing of branches from a fallen tree.

29

CHAIN SAW OPERATIONS

CUTTING VARIATIONS

TRUE/FALSE

There is an extreme danger of kickback during the limbing operation. Do not work with the nose of the bar. Be extremely cautious and avoid contacting the log or other limbs with the nose of the guide bar. Do not stand on a log while limbing it - you may slip off or the log may roll.

TRUE

30

CHAIN SAW OPERATIONS

CUTTING VARIATIONS

Be extremely cautious when cutting limbs or logs under tension. The limbs or logs could spring back toward the operator and cause loss of control of the saw and severe or fatal injury to the operator.

TRUE

31

CHAIN SAW OPERATIONS

CUTTING VARIATIONS

What is bucking?

Bucking is cutting a log into sections.

32

CHAIN SAW OPERATIONS

CUTTING VARIATIONS

During bucking, stand on the log to get a better vantage point and cut area.

FALSE

When bucking, do not stand on the log. Make sure the log will not roll downhill. If on a slope, stand on the uphill side of the log.

33

CHAIN SAW OPERATIONS

SAFETY REQUIREMENTS

TRUE/FALSE

Chain saws are permitted to be used on a ladder.

FALSE

Saw shall not be operated from a ladder.

34

CHAIN SAW OPERATIONS

SAFETY REQUIREMENTS

While operating the chain saw, the operator and control person shall wear the following NFPA approved protective equipment:

- long sleeved work duty shirt or bunker coat

- Helmet

- eye protection

- ear protection

- gloves

- bunker boots

- chaps

35

CHAIN SAW OPERATIONS

SAFETY REQUIREMENTS

Chaps must be worn over __________, chaps shall never be worn over __________.

Chaps must be worn over long pants or bunker pants, chaps shall never be worn over shorts.

36

CHAIN SAW OPERATIONS

MAINTENANCE

When repairs to the saw are required, unit is to forward saw to __________ with a ________.

TECHNICAL SERVICES DIVISION WITH A RT-2

When repairs to the saw are required, unit is to forward saw to TECHNICAL SERVICES DIVISION with a RT-2.

37

CHAIN SAW OPERATIONS

MAINTENANCE

When is the chain saw required to be tested and who establishes the schedule.

Chainsaws are required to be tested weekly and the schedule is to be established by the company commander.

38

CHAIN SAW OPERATIONS

MAINTENANCE

When are bar oil levels checked?

Bar oil levels are checked prior to cutting operations and replenished as required during cutting.

39

CHAIN SAW OPERATIONS

MAINTENANCE

When is the air filter cleaned?

The air filter is cleaned and examined after each cutting operation.

40

CHAIN SAW OPERATIONS

MAINTENANCE

Chains requiring resharpening are to be forwarded to _______ with a ________.

TECHNICAL SERVICES DIVISION WITH A RT-2

Chains requiring resharpening are to be forwarded to TECHNICAL SERVICES DIVISION with a RT-2.

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