CDL Manual

Question 1

Avoid ____ whenever you can.

Answer 1

Backing

Question 2

How do you know if your ABS system is possibly malfunctioning?

Answer 2

Light stay on after bulb check, or comes on once you are under way.

Question 3

Air Pressure should build from ___ to ____ psi withing 3 minutes.

Answer 3

50 to 90 psi

Question 4

Normal Oil Pressures when:
Idling?
Operating?

Answer 4

5-20 psi
35-75 psi

Question 5

Steering wheel shouldn’t have anymore than how many degrees of play?

Answer 5

10 degrees

Question 6

How many leaf springs must be broken or missing for the unit to go OOS?

Answer 6

One Fourth

Question 7

Minimum Tread Depth for
Front Tires?
All other Tires?

Answer 7

4/32 for Front
2/32 for Rear

Question 8

Slack Adjustor should have no more than how many inches of play?

Answer 8

1 in

Question 9

Brake drums (or discs) must not have cracks longer than what?

Answer 9

1/2 the width of the friction area

Question 10

Define ABS? Anti-Lock Braking Systems

Answer 10

Computerized system that keeps your wheels from locking up during hard brake applications.

Question 11

A warning signal you see or hear must come on before the air pressure falls below what?

Answer 11

60 PSI

Question 12

Spring Breaks (Emergency Brakes) will come on fully when air pressure drops to a range of what?

Answer 12

20 to 45 psi

Question 13

Never push the brake pedal down when the _______ are on.

Answer 13

Spring Brakes or Emergency Brake.

Question 14

Tolerable inches of play for checking belts?

Answer 14

1/2 to 3/4 inch play at center of belt.

Question 15

How many warning devices must you have I.E. Flares or triangles?

Answer 15

3 Triangles, 6 Fusees, or 3 Flares

Question 16

Air pressure should build from 50-90 within ___ mins.

Answer 16

3 Mins

Question 17

What is the “cut out” level and the “cut in” level for air pressures?

Answer 17

Cut out- 125psi
Cut in- 100psi

Question 18

What is the safety value for air compressor tanks set at?

Answer 18

150psi