CDL Air Brakes Test (2024) - FREE West Virginia CDL Practice Test

1. Which of the following is NOT part of the air brake system?

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

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

3. If your tires are hot, you should NOT:

stop to let the tires cool down.
drive until you correct the cause of the overheating.
once the tires have cooled down, make another stop to check the tires.
let air out of the tires so the pressure goes back to normal.

4. Air pressure should build up in a single air system, within about:

5. A low air pressure warning signal:

is required on vehicles with air brakes.
is optional on vehicles with air brakes.
is required on all vehicles without air brakes.
None of the above.

6. The safety valve installed in the first tank the air compressor pumps air is set to open:

if there is too much pressure.
every 15 minutes.
if there is too little pressure.
at 30 psi.

7. Which of the following statements is true?

There is no way that short circuits due to damaged insulation can cause a vehicle fire.
Carrying a properly charged and rated fire extinguisher will help prevent fires.
Poor cargo ventilation is a common cause of fire.
Under-inflated tires will NOT cause a vehicle fire.

8. Why must air tanks be drained?

The water can freeze in cold weather and cause brake failure.
There might not be enough antifreeze in the system.
Your transmission fluid may drain out.
The alcohol evaporator might stop working.

9. Which of the following is not a braking system on a truck?

10. You should always try to back toward the driver's side because:

backing toward the left side is more dangerous.
you can watch the rear of your vehicle out the side window.
you can more easily correct any steering errors.
None of the above.

WEST VIRGINIA CDL AIR BRAKES PRACTICE TEST