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Training Bulletins > TRAINING BULLETIN #044 Rotary Saw > Flashcards

TRAINING BULLETIN #044 Rotary Saw Flashcards

1
Q

The rotary saw is a versatile high speed, hand held, gas powered cutting device designed to cut solid materials such as

A

Steel, wood, masonry or polycarbonate

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2
Q

Each rotary saw will have access to several different blade types, a scrench tool, and a ______ _______ which allows for members to have a variety of options while on scene of an emergency.

A

Blade board

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3
Q

Rotary saw models

A

Partner k-950
Husqvarna k-960
Husqvarna k-970

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4
Q

It is utilized in a variety of operations such as

A

Forcible entry, ventilation and usar operation

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5
Q

All companies shall have at least ____ of each blade type available

A

1

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6
Q

The LAFD carries _ types of 14” rotary saw blades

A

4( metal cutting abrasive, combi blade, concrete diamond blade, carbide tip)

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7
Q

All companies shall have at least ____ of each blade type available.

A

One

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8
Q

The cutting material on abrasive blades consists of ___ bonded by an ______ _____.

A

Grit
Organic binder

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9
Q

“Reinforced blades” are made up of a _______ or _______ base, preventing total breakage at maximum working speed if the blade should be cracked or damaged.

A

Fabric or fiber base

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10
Q

Abrasive blades should not be used on soft metals such as

A

Aluminum or brass

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11
Q

These blades are used on steel, steel alloys and other hard metals.

A

Metal cutting abrasive blades

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12
Q

Abrasive blades should not be used on soft metals such as

A

Aluminum or brass

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13
Q

Blades shall be a minimum of __” to remain in front line service.

A

12

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14
Q

Blades used during _________ operations may become smaller while performing extensive cutting operations.

A

Emergency

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15
Q

During emergency operations the blade can be used…

A

Until no longer effective or safe

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16
Q

Blades smaller than 12” may be used for

A

Training purposes

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17
Q

Blades below __” shall be sent into the shops for replacement.

A

9’’

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18
Q

Abrasive blades shall be removed from service if there are signs of _______product contamination or ______ which could render the blade unsafe.

A

Petroleum

Cracks

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19
Q

Blades that are no longer safe for use shall be marked with a F-175 Tag and the word

A

‘’Unsafe”

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20
Q

The _______is a diamond blade that consists of a steel flat metal disc with synthetic diamonds bonded to the outer edge.

A

Combination “Combi” blade

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21
Q

______ ____ do not have teeth to cut; rather they have exposed diamond crystals used to grind the material.

A

Diamond blades

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22
Q

Stamping or printing by the manufacture near the ______ with “_____/____”, “______ ______”, or “_______/______” indicates a combination use blade.

A

Arbor
Metal/steel
Metal cutting
Concrete/metal

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23
Q

can be used to cut on bare metal, concrete, reinforced concrete, masonry or Robertson Decking.

A

Combi blade

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24
Q

Combi-blades can be used to cut on bare metal, concrete, reinforced concrete, masonry or _________ ______.

A

Robertson decking

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25
Q

All Combi-blades are

A

Bi-directional

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26
Q

The Combi-blade is not designed to cut soft metals such as _______ or _________, however it can cut thin, soft metal found on ______ siding, _______ siding, _____ ______ doors, or ________ gates.

A

Brass or aluminum
Train siding
Aircraft siding
Metal clad doors
Aluminum gates

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27
Q

Any glazing or buildup of material on the diamond segment can be cleaned by cutting into a soft material such as

A

Brick, cinder block, or asphalt

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28
Q

After several thousand grinding rotations, the exposed matrix holding the diamonds begins to wear and fracture. Matrix erosion exposes

A

New sharp diamonds

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29
Q

This cycle of erosion and exposing continues until all of the diamond and bond section of the segment is

A

Gone

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30
Q

The Combi-blade had a continuous cutting depth of____”.

A

4 3/4’’

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31
Q

Combi-blades shall be forwarded to Supply and Maintenance for replacement when:
● Any one segment is _____, ______ or _____.
● ____ _____ along any of the segments occur.
● Matrix bond is equal to the thickness of the ____ _____; a step or lip no longer exists.

A

Fractured, broken or missing

Bald spots

Blade body

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32
Q

A Diamond blade is similar in construction to the Combi-blade. Concrete diamond blades are designed as a _____ cutting rotation

A

Directional

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33
Q

An ______maybe stamped or printed on the blade indicating the proper rotation.

A

Arrow

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34
Q

blades are designed to cut concrete and metal encased in concrete.

A

Concrete diamond blades

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35
Q

With then concrete diamond blade do not attempt to cut…

A

Bare metal

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36
Q

Glazing or build-up of material on the diamond segments, can be cleaned by cutting in a soft material such as

A

Brick, cinder block, or asphalt

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37
Q

used for cutting composition roofing material, wood, and Lexan.

A

Carbide tip blade

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38
Q

Carbide tip blade

Use on light sheet metals such as door cladding or _________ sheet with care.

A

Aluminum sheet

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39
Q

Carbide tip blade

After use, check for ____ ______- and ________. If a missing tip or a visible radius appears, fill out a F-175 tag and send the blade to Supply and Maintenance for replacement.

A

Tip damage and sharpness

40
Q

STARTING PROCEDURE

  1. Make sure that the stop switch is in the _____ position (pushed to the _____).
A

Run
Left

41
Q

Starting procedure

Ensure the _______ is pulled out or in the closed position.

A

Choke

42
Q

Starting procedures

Engage the half throttle. This is accomplished by engaging the throttle and depressing the throttle lock button on the _____ side of the throttle assembly

A

Left

43
Q

Pulling out the choke on the K-970 will activate the _____ ________ position. The half throttle will remain engaged until the throttle trigger is engaged even if the choke is _______ ______ ______.

A

Half throttle position
Pushed back in

44
Q

Starting procedures

Press in the _____________ valve to reduce the pressure in the cylinder, this is to assist in starting the saw. The valve automatically returns to its initial position when the saw starts.

A

Decompression

45
Q

On the K-970, press the air purge diaphragm

A

6 times

46
Q

On the k-970 When you push the air purge diaphragm, fuel is pumped through to the __________. Fewer pulls will be required for starting.

A

Carburetor

47
Q

What are the two staring methods

A

Ground start or drop start

48
Q

Starting positions

Push in the choke control as soon as the engine

A

Pops or attempts to start

49
Q

Starting procedure
With the choke _______ ______, the engine will not continue to run. If the engine does not pop or attempt to start the saw may be _________.

A

Pulled out
Flooded

50
Q

Ground starting
Grip the front handle with your _______ hand. Put your _______ foot on the lower section of the rear handle pressing the saw against the ground.

A

Left hand
Right foot

51
Q

Pull the starter handle with your right hand to your _____ until the engine starts.

A

Chest

52
Q

Used when ground starting is not practical

A

Drop starting

53
Q

Drop starting

Grip the front handle with your _______ hand and stand upright with the saw at ______ level.

A

Left hand
Waist level

54
Q

can occur when the starter cord is continually pulled with the saw remaining in the choked position after the saw pops or attempts to start.

A

Flooding

55
Q

Flooding procedure

When the choke control is pulled or closed, the fuel mixture in the combustion chamber becomes too fuel ______ and the saw will not start until the combustion chamber is cleared of the fuel.

A

Rich

56
Q

The following is a way to clear the combustion chamber:

  1. Ensure the Choke is _____ ____and the _____ ______ is engaged. This allows the maximum amount of air to flow through the carburetor, combustion chamber and out the exhaust.
A

Pushed in

Half throttle

57
Q

The following is a way to clear the combustion chamber:

  1. Pull starting cord and cycle the saw quickly about ___ times. As the air to fuel mixture in the combustion chamber lowers it will start.
A

4-5 times

58
Q

To prevent the blade from binding during cutting operations, use the following procedures:

  1. Adjust blade guard to control _____ _____.
  2. Enter all cuts at ____ _____.
  3. Always cut in a ______ ______ (Do not twist saw to either side).
A

1.Cutting depth

  1. Full rpm
  2. Straight line
59
Q

To prevent the blade from binding during cutting operations, use the following procedures:

  1. Let the saw work without _____ or _____ the blade.
  2. Release throttle and immediately remove blade from cutting surface if ______ occurs to avoid belt damage.
A

4.Forcing or pressing

  1. Binding
60
Q

To set the depth of your cuts, you should use the blade guard as a depth gauge and the lower portion of the carrying handle as a

A

Pivot and skid

61
Q

It is optimal to have the saw set to the inboard position during this operation

A

Ventilation

62
Q

When in Inboard position, as the blade spins the _________ __________ will protect the user from debris

A

Blade guard

63
Q

The key to proper cutting positions is keeping the weight of the saw close to the body of the operator. This will enable the operator to use less muscle and more _______ structure to save energy.

A

Bone structure

64
Q

OPTIONS FOR CARRYING ALOFT

12’ utility strap

Utilize ____ _____ around the top of the handle and then clip on itself with a carabiner around the ______ handle

A

Larks foot

Throttle handle

65
Q

Sling strap across the chest to opposite shoulder and position saw as close to

A

Scba bottle as a possible

66
Q

Clip on itself around throttle handle and the other end to a backpack frame of the SCBA. What type of strap is this

A

Equipment carrying strap

67
Q

Inboard

With the blade centered it reduces blade ____ and provides better _______ of the saw during operations such as vertical ventilation on a roof or cutting concrete.

A

Bind
Balance

68
Q

This is the position of choice for forcible entry because it permits making flush cuts close to walls and floors.

A

Outboard

69
Q

Maintenance

Daily

A

Fuel
Starting position
Blade guard
Belt tension
Visual inspection
Blades and blade board
Carrying strap

70
Q

Maintenance

Weekly

A

Perform daily check
Start and run till warm
Run to high rpm
Abnormal sounds
Abnormal vibration
Inspect starter cord

71
Q

Maintenance

Monthly

A

Cutting head assembly
Drive belt
Clutch assembly
Air filter
Spark plug
Muffler
Replace fuel if needed

72
Q

Maintenance

After use

A

Refuel
Blade
Blade guard
Air filter
Visual inspection
Clean entire saw
Start and run saw

73
Q

A daily check is performed daily, normally performed immediately following

A

Relief

74
Q

When making two stroke fuel do not make more than?

A

One months supply

75
Q

Current LAFD policy is to replace fuel in small engines every ___ days with fresh fuel

A

30 days

76
Q

fuel stabilizer such as ______® or _____® should be used to keep gasoline fresh.

A

Sta-bil
Seafoam

77
Q

How many ounces of 2 cycle oil is needed for:

1 gallon of gas?

2 1/2 gallon of gas

5 gallons og gas

A

1 gallon=2.6
2 1/2= 6.5
5 = 13

78
Q

Weekly checks

While the saw is running, the member will depress the throttle fully for __-__ seconds to bring up the RPM’s and allow the saw to return to idle before repeating the process __-__times

A

1-2 seconds

2-3 times

79
Q

The rotary saw should not be allowed to run at full RPM without a load for more than a ____ seconds or engine damage may occur.

A

Few seconds

80
Q

Cutting head assembly

The ______or ______ assembly cannot be checked with tension on the belt.

A

Arbor or clutch assembly

81
Q

Air filter

___________ _____ or ______________ should not be used to clean a paper filter

A

Compressed air or solvents

82
Q

Spark plug gap

A

.020’’ (0.5mm)

83
Q

If the spark plug is dirty clean it with a

A

Wire brush

84
Q

If the saw is low on power, difficult to start or runs poorly at idle speed, the _______ _______could be the issue and replacement may be necessary.

A

Spark plug

85
Q

the rotary saw shall be taken to the Small Engine Repair shop to be inspected by Supply and Maintenance personnel When?

A

Annually during aerial ladder test or pump test

86
Q

Water with mild detergent may be used to clean the _______ of the saw. The saw should never be submerged in water.

A

Exterior

87
Q

When cleaning the engine parts, particular attention should be paid to cylinder and head fins if soiled with such material as molten tar, clean with

A

Degreaser

88
Q

Avoid exposing ______ _____products to parts like the belt, the pull-cord and the blade as it could damage their integrity.

A

Petroleum based

89
Q

The cutting blade continues to rotate up to________after the engine has stopped

A

A minute (known as blade coasting)

90
Q

Safety

Never use the _____________ ________ of the blade for cutting

A

Kickback zone

91
Q

Safety

_________ is when the cut closes and pinches the blade

A

Pinching

92
Q

Use caution when moving or repositioning the saw from a vertical to horizontal plane, or vice versa, while the cutting blade is rotating. This is

A

Gyroscopic effect

93
Q

Safety

If an electrical hazard is suspected or exists what shall be used

A

Gauntlet gloves

94
Q

Safety

Sparks can be thrown up to how many feet? Do not use rotary saws in flammable atmospheres surcharge as____________ _________ fires, ___________spills, _________ _______ _______

A

30 ft
Electrical vault fires
Tanker spills
Leaking natural gas

95
Q

Sparks

To protect personnel or patients from showering sparks, move personnel, change the angle of your saw, or use non-sparking tools. If those options are not practical, at a minimum, utilize an

A

Aluminized blanket

96
Q

How much should you tighten fuel caps

A

Hand tight

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