Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

RGC A/O > TB 44: Rotary Saw > Flashcards

TB 44: 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

A

steel, wood, masonry or polycarbonate

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

utilized in a variety of operations such as

A

forcible entry, ventilation and USAR operation

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

Each rotary saw will have access to several different

A

blade types, a scrench tool, and a blade board

allows for members to have a variety of options while on scene of an emergency

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

The LAFD carries 4 types of 14” rotary saw blades. What are they?

A

Abrasive Blade

Combi-Blade

Diamond Blade

Carbide Tooth Blade

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

Each blade type has a specific use. Each rotary saw should be accompanied by a blade board that has an assortment of blades that best fits the needs of the district. All companies shall have at least

A

one of each blade type available

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

METAL CUTTING ABRASIVE BLADES

A
  • consists of grit bonded by an organic binder
  • Reinforced blades” are made up of a fabric or fiber base, preventing total breakage at maximum working speed
  • used on steel, steel alloys and other hard metals

-not be used on soft metals such as aluminum or brass

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

Blades shall be a minimum of

A

12” to remain in front line service.

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

Blades used during emergency operations may become

A

smaller while performing extensive cutting operations

-used until it is no longer effective or safe

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

Blades smaller than 12” may be used for

A

training purposes

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

Blades below 9” shall be sent into

A

shops for replacement

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

Abrasive blades shall be removed from service if there are signs of

A

petroleum product contamination or cracks

-could render the blade unsafe

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

Blades that are no longer safe for use shall be marked with

A

F-175 Tag

word “UNSAFE” shall be marked on the blade

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

COMBINATION “COMBI” BLADE

A
  • diamond blade that consists of a steel flat metal disc with synthetic diamonds bonded to the outer edge
  • do not have teeth to cut; rather they have exposed diamond crystals used to grind the material
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Stamping or printing by the manufacture near the arbor with “Metal/Steel”, “Metal Cutting”, or “Concrete/Metal” indicates

A

combination use blade

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

Combi-blades can be used to cut

A

bare metal, concrete, reinforced concrete, masonry or Robertson Decking

-All Combi-blades are bi-directional

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

Combi-blade is not designed to cut

A

soft metals such as brass or aluminum

-however it can cut thin, soft metal found on train siding, aircraft siding, metal clad doors, or aluminum gates

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

Any glazing or buildup of material on the diamond segment can be cleaned by

A

cutting into a soft material such as brick, cinder block or asphalt

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

After several thousand grinding rotations, the exposed matrix holding the diamonds begins to

A

wear and fracture

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

Matrix erosion exposes new sharp diamonds. This cycle of erosion and exposing continues until

A

all of the diamond and bond section of the segment is gone

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

Combi-blade had a continuous cutting depth of

A

4¾”

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

Combi-blades shall be forwarded to Supply and Maintenance for replacement when:

A
  • Any one segment is fractured, broken or missing.
  • Bald spots along any of the segments occur.
  • Matrix bond is equal to the thickness of the blade body; a step or lip no longer exists
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

CONCRETE DIAMOND BLADES

A

similar in construction to the Combi-blade

  • designed as a directional cutting rotation
  • arrow stamped or printed on the blade indicating the proper rotation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Concrete diamond blades are designed to

A

Cut concrete and metal encased in concrete

*Do not attempt to cut bare metal with this blade!

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

Glazing or build-up of material on the diamond segments, can be cleaned by

A

Cutting in a soft material such as brick, cinder block or asphalt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
As with the Combi-blades, Diamond blades shall be forwarded to Supply and Maintenance for replacement when
1. Any one segment is fractured, broken or missing. 2. Bald spots along any of the segments occur. 3. Matrix bond is equal to the thickness of the blade body. No step or lip exists.
26
CARBIDE TIP BLADE
tempered metal blade, carbide tipped - cutting composition roofing material, wood, and Lexan - Use on light sheet metals such as door cladding or aluminum sheet with care - After use, check damage and sharpness. 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
27
safety equipment should be used while operating the saw
Gloves Eye Protection Helmet Brush Jacket/Turn out coat
28
Engage the half throttle. This is accomplished by engaging the throttle and
depressing the throttle lock button on the left side of the throttle assembly
29
Pulling out the choke on the K-970 will
Activate the half throttle position
30
The half throttle will remain engaged until the throttle trigger is
Engaged even if the choke is pushed back in
31
What will assist in starting the saw?
Pressing in the compression valve Automatically returns to its initial position when the saw starts
32
On the K-970, how many times do you press the air purge diaphragm?
6 times
33
What happens when you push the air purge diaphragm?
Fuel is pumped through to the carb Fewer pulls will be required for starting
34
What are the two starting methods?
Ground Start or Drop Start
35
Ground Start Procedures:
- Grip front handle with left hand - Right foot on lower section of rear handle - Slowly pull cord with right hand, until resistance is felt - Pull firmly and rapidly - Pull cord to chest with right hand -DO NOT pull the started cord all the way or let go of handle when cord is fully extended
36
Drop Start Procedure:
- Grip from handle with left hand - Stand upright, saw waist level - Keep blade away from body at all times - Right hand on starting handle, fully extend left arm down while pulling firmly and rapidly on starting handle towards chest
37
Does the cutting blade rotate when the engine is started?
Yes
38
Flooding Procedures:
- Choke pushed in - Half Throttle engaged (allows maximum amount of air to flow through carburetor, combustion chamber and out exhaust) - Pull cord 4-5 times (air to fuel mix lower, saw will start)
39
How does flooding occur?
Starter cord continually pulled while remaining in choked position after the saw pops or attempts to start Fuel mixture in combustion chamber becomes too fuel rich until chamber is cleared of fuel
40
To prevent from binding:
- Adjust blade guard for cutting depth - Enter cuts at fu RPMs - Cut in straight line (Do not twist) - Let the saw work without forcing or pressing the blade - Release throttle and immediately remove blade if occurs (avoid belt damage)
41
Which position is best when used during ventilation or extended concrete cutting operations:
Inboard position Protects user from debris
42
What are some cutting procedures options?
``` Vertical Cut Low Horizontal Cut Low Vertical Cut Mid Horizontal Cut Mid Vertical Cut High Horizontal Cut High ```
43
Carrying Aloft (12’ Utility Strap):
- Larks foot around top of handle - Clip on itself with carabiner around throttle handle - Sling strap across chest to opposite shoulder - Position close to SCBA bottle
44
Carrying Aloft (Equipment Carrying Strap):
- Clip on itself around throttle handle and other end to backpack frame of SCBA - Place over shoulder, then opposite side of SCBA bottle - Position saw at SCBA bottle level by adjusting carrying strap
45
Inboard: With the blade centered it reduces blade bind and provides better balance of the saw during ops such as:
Vertical ventilation on a roof or cutting concrete
46
Inboard: The saw can be dragged through the material by using the _____, and the lower portion of the carrying handle as a ____?
Depth Gauge, Pivot and Skid
47
What is the position of choice for forcible entry because it permits making flush cuts close to the walls and floors?
Outboard
48
What are daily maintenance?
``` Fuel Starting Position Blade Guard Belt Tension Visual Inspection Blades and Blade Board Carrying Strap ```
49
Weekly Check:
``` Perform Daily Check Start & run till warm Run to high RPM Check for: Abnormal Sounds Abnormal Vibration Inspect starter cord ```
50
Monthly Check:
``` Check: Cutting head assembly Drive Belt Clutch assembly Air Filter Spark Plug Muffler Replace fuel if needed ```
51
After Use:
``` Refuel Blade/Blade Guard Air Filter Visual Inspection Clean entire saw Start & Run Saw ```
52
What type of fuel does the saw take?
50:1 Two stroke fuel mixture
53
Making two-stroke fuel:
Fill container half amount of gas Add entire two stroke oil Mix (Shake) Add remaining amount of gas *Do not make more than one months supply of fuel at a time
54
Current LAFD policy is to replace fuel in small engines every ___ days with fresh fuel
30 days
55
What are two forms of stabilizer to keep gas fresh
Sta-bil or | Seafoam
56
Gas to 2 cycle oil ratio:
1 Gal - 2.6 oz 2.5 Gal - 6.5 oz 5 Gal - 13 oz
57
Which form should the weekly checks be documented on?
F-973W
58
During a weekly check, depress the throttle fully for ____ seconds to bring up the RPMs and allow the saw to return to idle before repeating the process how many times?
1-2 Seconds/ 2-3 Times
59
With the engine stopped, slowly pullout the starter cord and inspect for:
General condition and fraying
60
The starting cord should fully retract into the cover. If it fails to fully retract or shows signs of damage, contact:
Small Engine Repair shop at S&M
61
When monthly checks are performed, where should you document it at?
F-973M Perform Monthly checks, one saw at a time When completed, perform a daily check prior to putting the saw back into service
62
To check the Cutting Head Assembly:
- Remove blade and check guard for debris - Losses drive belt, check arbor or clutch assembly that rotates freely without roughness - Arbor or clutch can not be checked with tension on belt
63
When cleaning the air filter, to remove trapped debris, tap the filter gently on the…
Palm of your hands
64
What should not be used when cleaning a paper filter?
Compressed air or solvents
65
Who do you contact when filter is unserviceable?
S&M for replacement
66
During which operation should special attention be given to the condition of the filter?
During extended dusty ops such as concrete cutting
67
If the spark plug is dirty, what do you clean it with? What is the electrode gap on the spark plug?
Wire Brush .020” (0.5mm)
68
How will the saw react if the spark plug has a issue or needs to be replaced??
Low on power Difficult to start Runs poorly at idle speed
69
When does the rotary taken to the small engine repair shop to be inspected by S&M personnel?
Annually | During Annual Pump Test or Aerial Ladder Test
70
What do you use to clean the exterior of the saw?
Water with mild detergent
71
When cleaning the engine parts, where should you pay attention to the most?
Cylinder and head fins if soiled with such material as molten tar, clean with degreaser
72
What do you want avoid cleaning with petroleum-based products?
Belt Pull-Cord Blade Could damage integrity
73
How long does the blade continue to rotate after the engine has stopped?
Up to a minute *let blade slow down or stop. In the material
74
Which area do you not use the blade for cutting?
Kickback zone | Reactive force will push the saw up and back towards the user
75
What should be used If electrical hazards are suspected or exists?
Gauntlet gloves shall be used
76
How far can sparks be thrown up to?
30 Feet
77
Where should you NOT use the rotary saw?
In flammable atmospheres Electrical vault fires Tanker spills or leaking of natural gas
78
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 to protect personnel or patients.

RGC A/O (45 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions