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
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
3
Q
Rotary saw models
A
Partner k-950
Husqvarna k-960
Husqvarna k-970
4
Q
It is utilized in a variety of operations such as
A
Forcible entry, ventilation and usar operation
5
Q
All companies shall have at least ____ of each blade type available
A
1
6
Q
The LAFD carries _ types of 14” rotary saw blades
A
4( metal cutting abrasive, combi blade, concrete diamond blade, carbide tip)
7
Q
All companies shall have at least ____ of each blade type available.
A
One
8
Q
The cutting material on abrasive blades consists of ___ bonded by an ______ _____.
A
Grit
Organic binder
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
10
Q
Abrasive blades should not be used on soft metals such as
A
Aluminum or brass
11
Q
These blades are used on steel, steel alloys and other hard metals.
A
Metal cutting abrasive blades
12
Q
Abrasive blades should not be used on soft metals such as
A
Aluminum or brass
13
Q
Blades shall be a minimum of __” to remain in front line service.
A
12
14
Q
Blades used during _________ operations may become smaller while performing extensive cutting operations.
A
Emergency
15
Q
During emergency operations the blade can be used…
A
Until no longer effective or safe
16
Q
Blades smaller than 12” may be used for
A
Training purposes
17
Q
Blades below __” shall be sent into the shops for replacement.
A
9’’
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
19
Q
Blades that are no longer safe for use shall be marked with a F-175 Tag and the word
A
‘’Unsafe”
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
21
Q
______ ____ do not have teeth to cut; rather they have exposed diamond crystals used to grind the material.
A
Diamond blades
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
23
Q
can be used to cut on bare metal, concrete, reinforced concrete, masonry or Robertson Decking.
A
Combi blade
24
Q
Combi-blades can be used to cut on bare metal, concrete, reinforced concrete, masonry or _________ ______.
A
Robertson decking
25
All Combi-blades are
Bi-directional
26
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.
Brass or aluminum
Train siding
Aircraft siding
Metal clad doors
Aluminum gates
27
Any glazing or buildup of material on the diamond segment can be cleaned by cutting into a soft material such as
Brick, cinder block, or asphalt
28
After several thousand grinding rotations, the exposed matrix holding the diamonds begins to wear and fracture. Matrix erosion exposes
New sharp diamonds
29
This cycle of erosion and exposing continues until all of the diamond and bond section of the segment is
Gone
30
The Combi-blade had a continuous cutting depth of____”.
4 3/4’’
31
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.
Fractured, broken or missing
Bald spots
Blade body
32
A Diamond blade is similar in construction to the Combi-blade. Concrete diamond blades are designed as a _____ cutting rotation
Directional
33
An ______maybe stamped or printed on the blade indicating the proper rotation.
Arrow
34
blades are designed to cut concrete and metal encased in concrete.
Concrete diamond blades
35
With then concrete diamond blade do not attempt to cut…
Bare metal
36
Glazing or build-up of material on the diamond segments, can be cleaned by cutting in a soft material such as
Brick, cinder block, or asphalt
37
used for cutting composition roofing material, wood, and Lexan.
Carbide tip blade
38
Carbide tip blade
Use on light sheet metals such as door cladding or _________ sheet with care.
Aluminum sheet
39
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.
Tip damage and sharpness
40
STARTING PROCEDURE
1. Make sure that the stop switch is in the _____ position (pushed to the _____).
Run
Left
41
Starting procedure
Ensure the _______ is pulled out or in the closed position.
Choke
42
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
Left
43
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 _______ ______ ______.
Half throttle position
Pushed back in
44
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.
Decompression
45
On the K-970, press the air purge diaphragm
6 times
46
On the k-970 When you push the air purge diaphragm, fuel is pumped through to the __________. Fewer pulls will be required for starting.
Carburetor
47
What are the two staring methods
Ground start or drop start
48
Starting positions
Push in the choke control as soon as the engine
Pops or attempts to start
49
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 _________.
Pulled out
Flooded
50
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.
Left hand
Right foot
51
Pull the starter handle with your right hand to your _____ until the engine starts.
Chest
52
Used when ground starting is not practical
Drop starting
53
Drop starting
Grip the front handle with your _______ hand and stand upright with the saw at ______ level.
Left hand
Waist level
54
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.
Flooding
55
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.
Rich
56
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.
Pushed in
Half throttle
57
The following is a way to clear the combustion chamber:
2. Pull starting cord and cycle the saw quickly about ___ times. As the air to fuel mixture in the combustion chamber lowers it will start.
4-5 times
58
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).
1.Cutting depth
2. Full rpm
3. Straight line
59
To prevent the blade from binding during cutting operations, use the following procedures:
4. Let the saw work without _____ or _____ the blade.
5. Release throttle and immediately remove blade from cutting surface if ______ occurs to avoid belt damage.
4.Forcing or pressing
5. Binding
60
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
Pivot and skid
61
It is optimal to have the saw set to the inboard position during this operation
Ventilation
62
When in Inboard position, as the blade spins the _________ __________ will protect the user from debris
Blade guard
63
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.
Bone structure
64
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
Larks foot
Throttle handle
65
Sling strap across the chest to opposite shoulder and position saw as close to
Scba bottle as a possible
66
Clip on itself around throttle handle and the other end to a backpack frame of the SCBA. What type of strap is this
Equipment carrying strap
67
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.
Bind
Balance
68
This is the position of choice for forcible entry because it permits making flush cuts close to walls and floors.
Outboard
69
Maintenance
Daily
Fuel
Starting position
Blade guard
Belt tension
Visual inspection
Blades and blade board
Carrying strap
70
Maintenance
Weekly
Perform daily check
Start and run till warm
Run to high rpm
Abnormal sounds
Abnormal vibration
Inspect starter cord
71
Maintenance
Monthly
Cutting head assembly
Drive belt
Clutch assembly
Air filter
Spark plug
Muffler
Replace fuel if needed
72
Maintenance
After use
Refuel
Blade
Blade guard
Air filter
Visual inspection
Clean entire saw
Start and run saw
73
A daily check is performed daily, normally performed immediately following
Relief
74
When making two stroke fuel do not make more than?
One months supply
75
Current LAFD policy is to replace fuel in small engines every ___ days with fresh fuel
30 days
76
fuel stabilizer such as ______® or _____® should be used to keep gasoline fresh.
Sta-bil
Seafoam
77
How many ounces of 2 cycle oil is needed for:
1 gallon of gas?
2 1/2 gallon of gas
5 gallons og gas
1 gallon=2.6
2 1/2= 6.5
5 = 13
78
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
1-2 seconds
2-3 times
79
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.
Few seconds
80
Cutting head assembly
The ______or ______ assembly cannot be checked with tension on the belt.
Arbor or clutch assembly
81
Air filter
___________ _____ or ______________ should not be used to clean a paper filter
Compressed air or solvents
82
Spark plug gap
.020’’ (0.5mm)
83
If the spark plug is dirty clean it with a
Wire brush
84
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.
Spark plug
85
the rotary saw shall be taken to the Small Engine Repair shop to be inspected by Supply and Maintenance personnel When?
Annually during aerial ladder test or pump test
86
Water with mild detergent may be used to clean the _______ of the saw. The saw should never be submerged in water.
Exterior
87
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
Degreaser
88
Avoid exposing ______ _____products to parts like the belt, the pull-cord and the blade as it could damage their integrity.
Petroleum based
89
The cutting blade continues to rotate up to________after the engine has stopped
A minute (known as blade coasting)
90
Safety
Never use the _____________ ________ of the blade for cutting
Kickback zone
91
Safety
_________ is when the cut closes and pinches the blade
Pinching
92
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
Gyroscopic effect
93
Safety
If an electrical hazard is suspected or exists what shall be used
Gauntlet gloves
94
Safety
Sparks can be thrown up to how many feet? Do not use rotary saws in flammable atmospheres surcharge as____________ _________ fires, ___________spills, _________ _______ _______
30 ft
Electrical vault fires
Tanker spills
Leaking natural gas
95
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
Aluminized blanket
96
How much should you tighten fuel caps
Hand tight
