TB-44: Rotary Saw

Question 1

The LAFD carries 4 types of 14” rotary saw blades

Answer 1

Abrasive, Combi, Diamond, Carbide

Question 2

Blades shall be a minimum of _____ to remain in front line service

Answer 2

12”

Question 3

Blades smaller than _____ may be used for training purposes.

Answer 3

12”

Question 4

Blades below _____ shall be sent into the shops for replacement.

Answer 4

9”

Question 5

Abrasive blades shall be removed from service if there are signs of __________ which could render the blade unsafe

Answer 5

petroleum product contamination or cracks

Question 6

The Combi-blade is a…..

Answer 6

diamond blade

Question 7

Combi-blades can be used to cut on…..

Answer 7

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

Question 8

All Combi-blades are …..

Answer 8

bi-directional.

Question 9

The Combi-blade is not designed to cut soft metals such as…

Answer 9

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

Question 10

(Combi & Diamond blades) Any glazing or buildup of material on the diamond segment can be cleaned by…

Answer 10

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

Question 11

The Combi-blade had a continuous cutting depth of

Answer 11

4 3/4”

Question 12

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

Answer 12

● 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.

Question 13

A Diamond blade is

Answer 13

oncrete diamond blades are designed as a directional cutting rotation. An arrow maybe stamped or printed on the blade indicating the proper rotation

Question 14

Concrete diamond blades are designed to cut

Answer 14

concrete and metal encased in concrete. Do not attempt to cut bare metal with this blade.

Question 15

CARBIDE TIP BLADE

Answer 15

used for cutting composition roofing material, wood, and Lexan. Use on light sheet metals such as door cladding or aluminum sheet

Question 16

At a minimum, the following safety equipment should be used while operating the saw:

Answer 16

1. Gloves
2. Eye Protection
3. Helmet
4. Brush jacket/Turn out coat

Question 17

Flooding can occur when the starter cord is continually pulled with the saw…..

Answer 17

remaining in the choked position after the saw pops or attempts to start.

Question 18

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

Answer 18

Inboard Position

Question 19

The Rotary saw uses a 50:1 two-stroke fuel mixture.

Answer 19

Start by filling the container with half the amount of gasoline to be used. Then add the entire amount of two-stroke oil.

Question 20

Current LAFD policy is to replace fuel in small engines every 30 days with fresh fuel. Also, a fuel stabilizer such as…..

Answer 20

Sta-bil® or Seafoam®

Question 21

he cutting blade continues to rotate up to ______ after the engine has stopped

Answer 21

1 minute

Question 22

The electrode (spark plug) gap is ____

Answer 22

.020” (0.5 mm)

Question 23

Sparks can be thrown up to….

Answer 23

30 feet