FREE New Jersey CDL Doubles Triples Practice Test (2024)

1. Retarders:

help prevent accidents by applying extra braking power to the non-drive wheels.
help slow a vehicle and reduce brake wear.
apply their braking power whenever you push on the accelerator.
All of the above.

2. You should NOT use the parking brakes if:

3. An ABS system:

helps increase a vehicle's stopping power.
decreases your stopping distance.
is a safety anti-skid braking system.
requires a change in the way you brake.

4. The best way to recognize that your trailer has started to skid is:

by opening the window and feeling the front of the mirror.
by recognizing tire failure.
by seeing it in your mirrors.
by feeling the brakes come on.

5. When trying to put out an electrical fire you should:

6. Which of the following is not proper tie-down equipment:

7. You can release dolly brakes:

by closing the emergency line valve.
by opening the air tank petcock.
by opening the service line valve.
by closing the air tank petcock.

8. Which of the following is a common cause of truck fires?

Short circuits due to loose connections.
loose fuel connections.
Under-inflated tires and duals that touch.
All of the above.

9. Foundation brakes are used:

10. Fully loaded rigs:

are less likely to roll over than empty rigs.
are just as likely to roll over as empty rigs.
are much more likely to roll over than empty rigs.
None of the above.

NEW JERSEY CDL DOUBLES TRIPLES PRACTICE TEST