CDL Manual

Question 1

Minimum Tread Depth on tires?

Answer 1

4/32 in on front tires

2/32 in on all other tires

Question 2

Steering wheel play of no more than _____ degrees is allowed?

Answer 2

10 degrees

Question 3

Air Pressure should build from 50 to 90 psi within ___ minutes with Engine running.

Answer 3

3

Question 4

Normal Oil Pressures when at idle?

Operating?

Answer 4

5-20 psi at idle

35-75 psi operating.

Question 5

Normal operating battery voltage on gauge?

Answer 5

Between 12-14 Volts

Question 6

When driving in incliment weather, what should be done with regard to the Engine Retarder (Jake-Brake)?

Answer 6

Should be turned off.

Question 7

When driving always look ahead roughly?

Answer 7

12-15 seconds

Question 8

Define Perception Distance

Answer 8

Distance traveled from time your eyes see hazard, until your brain recognizes it.

Question 9

Define Reaction Distance

Answer 9

Distance traveled after recognizing issue, before hitting the brakes.

Question 10

Define Braking Distance

Answer 10

Distance traveled while brakes are applied.

Question 11

What makes up the total stopping distance?

Answer 11

Perception Distance+Reaction Distance+Braking Distance

Question 12

Reduce speed by about ____ on a wet road

Answer 12

1/3

Question 13

Hydroplaning can occur at speeds as low as __ mph?

Answer 13

30 mph

Question 14

With regard to following distance, what is the formula to determine how far away to be?

Answer 14

1 Second is required for each 10 feet of vehicle length at speeds under 40 mph.

If above 40 mph use same formula, and add an additional second.

Question 15

If there are two turning lanes, always use the farthest ___ turn lane.

Answer 15

Right

Question 16

With low beams you can see roughly ____ feet ahead, high beams about ____ to ______ feet.

Answer 16

250 ft Lowbeam

350-500 ft Highbeams

Question 17

You may have lost ABS control if?

Answer 17

The lamp stays on after bulb check OR goes on once under way.

Question 18

The most common accident occur where?

Answer 18

Intersections

Question 19

Stop roughly how far away from railroad crossings before proceding across?

Answer 19

15-50 ft

Question 20

If equipped with a manual air tank drain, be sure to drain the tanks __________.

Answer 20

Completely, due to water and oil possibly settling at the bottom of the tank.

Question 21

Low Air Warning signal must come on before the air pressure falls below _____ psi?

Answer 21

60 psi

Question 22

The emergency brake will activate once pressure drops between ___ to _____ psi?

Answer 22

20 to 45 psi

Question 23

ABS (Antilock Braking System) is designed to do what?

Answer 23

Keep the wheels from locking up.

Question 24

If equipped with manual slack adjusters, when checking, if the the adjustor moves more than __ inch, it needs to be adjusted.

Answer 24

1 inch

Question 25

When testing the air leakage rate, with fully charged air system, turn off the engine, release parking brake, and depress the brake. The loss rate should be less than ____ psi in One minute for single vehicles.

And, ____ psi in One minute for combination vehicles.

Answer 25

3 psi/minute (Single Vehicle)

4 psi/minute (Combination Vehicle)

Question 26

When checking rate of Air Pressure Buildup the oressure should build from 85 to 100 psi within ___ seconds.

Answer 26

45 seconds

Question 27

When using air brakes, it can take ____ second or more for air to flow through the lines to the brakes.

Answer 27

1/2 second

Question 28

When checkinf Engine Compartment Belts, be sure their is no more than ____ to ____ inch play at center of the belt?

Answer 28

1/2 to 3/4 in