FREE Virginia CDL Doubles & Triples Practice Test (2024)

1. Most heavy-duty vehicles use:

2. Truck tractors with air brakes built after March 1, 1997, are required to be equipped with:

3. You are driving a vehicle with air brakes when the low air pressure warning light and buzzer come on. You should:

slow down and test your brakes.
pull off the road and stop immediately.
activate your hazard lights and drive to the nearest place where you can stop.

4. Dollies with ABS are required to have a malfunction lamp:

5. Hanging meat in a refrigerated truck:

will not affect safe driving ability.
can be a very unstable load.
should never be transported.

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

7. If you're feeling tired while driving you should:

eat something.
drink coffee.
stop driving and get some rest.

8. Having ABS on only the trailer:

makes the trailer more likely to swing out.
still gives you more control over your vehicle during braking.
is very dangerous.

9. Which of the following statements about retarders is NOT correct?

Retarders help you avoid skids.
Retarders help slow a vehicle, reducing the need for using brakes.
You should turn the retarder off whenever the road is wet, icy, or snow covered.

10. When you discover a fire, if the trailer doors are hot you should not open them because:

with air many fires do less damage.
opening the doors lets air in and may make the fire flare up.
the temperature of the trailer should not be changed in any way.

CDL DOUBLES TRIPLES PRACTICE TEST VIRGINIA