CDL Doubles Triples Practice Test (2024)

1. Rough acceleration can cause:

mechanical damage.
damage electrical and brake lines.
tire damage.

2. Which of the following statements is true?

Carrying a properly charged and rated fire extinguisher will help prevent fires.
Poor cargo ventilation is a common cause of fire.
There is no way that short circuits due to damaged insulation can cause a vehicle fire.

3. The trolley valve should be used only:

4. A low air pressure warning signal:

is required on all vehicles without air brakes.
is required on vehicles with air brakes.
is optional on vehicles with air brakes.

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

6. An alcohol evaporator:

used to reduce the chance of the front wheels skidding.
protects the air brake system from too much pressure.
is used to reduce the risk of ice in air brake valves and other parts during cold weather.

7. The minimum amount of tread for rear tires is:

8. If the air compressor is belt-driven, you should check the air compressor drive belt before each trip. The belt should be:

9. No matter how small the cargo is, it should have at least:

10. If during vehicle inspection a tire is too hot to touch, you should:

let air out.
immediately decrease air pressure.
remain stopped until the tire cools off.

NM CDL DOUBLES TRIPLES PRACTICE TEST