CDL Air Brakes Test (2024) - FREE North Dakota CDL Practice Test

1. Which of the following is NOT a warning sign of fatigue?

Heavy eyelids
Driving at the speed of the traffic
Trouble remembering the last few miles driven
Frequent blinking

2. In air-operated disc brakes, the pressure of the ______ on the ______ turns a "power screw".

slack adjuster; cam roller
brake chamber; slack adjuster
slack adjuster; tie rod
brake camshaft; tie rod

3. What factors can cause brakes to fade?

Dirt roads and in unpaved yards.
Gravel and tar.
Excessive heat and brakes out of adjustment.
Slippery surfaces and shaded areas.

4. You can be sure that your vehicle is equipped with ABS:

if your company requires the use of antilock brakes in its policies.
if the vehicle was manufactured after 1998.
if the vehicle was manufactured after 2000.
if the vehicle was manufactured after 2010.

5. Antifreeze:

helps the engine only when the temperature is below freezing.
doesn't help the engine in any way.
helps the engine only under hot conditions.
helps the engine under hot conditions as well as cold conditions.

6. When should you be particularly careful about high winds?

7. You should drain the air tanks completely. If water and oil collect in the air tanks:

your brakes could fail.
your brakes could become hard to press.
your brakes could heat up.
None of the above.

8. While driving, you should use your mirrors to:

check the condition of the tires and cargo.
know where other vehicles are around you.
check where the rear of your vehicle is while you make turns.
All of the above.

9. If your vehicle does not have automatic air tank drains, how often should you drain air tanks to remove moisture and oil?

10. To use the controlled braking method in an emergency, you should:

apply the brakes as hard as you can without locking the wheels.
apply the brakes when the wheels lock up.
pump the brake pedal 3 times.
apply your brakes all the way, and release the brakes when the wheels lock up.

NORTH DAKOTA CDL AIR BRAKES PRACTICE TEST