TB 44 Rotary Saw

Question 1

Rotary saw make and models

Answer 1

Partner k 950 / Husqvarna k 960 and k 970

Question 2

The cutting material on abrasive blades consists of ___.

Answer 2

grit bonded by an organic binder.

Question 3

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

Answer 3

fabric or fiber base

Question 4

Abrasive blades are used on

Answer 4

Steel, steel alloy and other hard metals

Question 5

Abrasive blades should not be used on soft metals such as

Answer 5

Aluminum or brass

Question 6

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

Answer 6

12”

Question 7

Blades smaller than 12” may be used for ___

Answer 7

training purposes.

Question 8

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

Answer 8

9”

Question 9

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

Answer 9

petroleum product contamination / cracks

Question 10

The Combi-blade is a diamond blade that consists of a steel flat metal disc with ___ to the outer edge.

Answer 10

synthetic diamonds bonded

Question 11

Combi-blades can be used to cut on bare metal, concrete, ___, ____ or Robertson Decking

Answer 11

reinforced concrete / masonry

Question 12

All Combi-blades are____.

Answer 12

bi-directional.

Question 13

The Combi-blade is not designed to cut soft metals such as ___, however it can cut thin, soft metal found on train siding, aircraft siding, metal clad doors, or aluminum gates.

Answer 13

brass or aluminum

Question 14

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

Answer 14

brick, cinder block or asphalt.

Question 15

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

Answer 15

new sharp diamonds.

Question 16

This cycle of erosion and exposing continues until all of the diamond and bond section of the segment is gone. The Combi-blade had a continuous cutting depth of ____.

Answer 16

4¾”

Question 17

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

Answer 17

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 18

A Diamond blade is similar in construction to the ___.

Answer 18

Combi-blade

Question 19

Concrete diamond blades are designed as a ____. An arrow maybe stamped or printed on the blade indicating the proper rotation.

Answer 19

directional cutting rotation

Question 20

Concrete diamond blades are designed to cut ___ and ____.

Answer 20

concrete / metal encased in concrete.

Question 21

Diamond Blade : Do not attempt to cut ___ with this blade.

Answer 21

bare metal

Question 22

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

Answer 22

brick, cinder block or asphalt.

Question 23

A tempered metal blade, carbide tipped, used for cutting _____.

Answer 23

composition roofing material, wood, and Lexan.

Question 24

Carbide Tip Blade: Use on light sheet metals such as _____

Answer 24

door cladding or aluminum sheet with care.

Question 25

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

Answer 25

6 times

Question 26

Flooding Procedures:

1. Ensure the Choke is ___ and the half throttle is engaged. This allows the maximum amount of air to flow through the carburetor, combustion chamber and out the exhaust.
2. Pull starting cord and cycle the saw quickly about ___ As the air to fuel mixture in the combustion chamber lowers it will start.

Answer 26

pushed in / 4-5 times.

Question 27

With the blade centered it reduces blade bind and provides better balance of the saw during operations such as ___.

Answer 27

vertical ventilation on a roof or cutting concrete

Question 28

Fuel Mixture, how many ounces of 2 cycle oil?

1 gallon :

Answer 28

2.6 ounces

Question 29

Fuel Mixture, how many ounces of 2 cycle oil?

2 1/2 gallon :

Answer 29

6.5 ounces

Question 30

Fuel Mixture, how many ounces of 2 cycle oil?

5 gallons :

Answer 30

13 ounces

Question 31

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

Answer 31

30 days

Question 32

Also, a fuel stabilizer such as ___ should be used to keep gasoline fresh.

Answer 32

Sta-bil® or Seafoam®

Question 33

If the spark plug is dirty, clean it with a wire brush and at the same time check that the electrode gap is ____ .If the saw is low on power, difficult to start or runs poorly at idle speed, the spark plug could be the issue and replacement may be necessary.

Answer 33

.020” (0.5 mm).

Question 34

Annually, the rotary saw shall be taken to the ____ to be inspected by Supply and Maintenance personnel during Annual Pump Test or Aerial Ladder Test.

Answer 34

Small Engine Repair shop

Question 35

Sparks can be thrown up to___.

Answer 35

30 feet.

Question 36

The LAFD carries 4 types of ___ rotary saw blades

Answer 36

14”

Question 37

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

Answer 37

vertical ventilation