FREE Arizona Combination Practice Test (2024)

1. What is the proper following distance for a 40 foot truck traveling at 35 mph?

2. After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:

shutting the engine off so you can hear the brakes.
applying and releasing the trailer brakes and listening for the sound of trailer brakes.
All of the above.

3. On front tires, tread should be at least:

4. How many red reflective triangles should you carry?

5. Older trailers do not have spring brakes. If the air supply leaks away:

the ABS won't work properly.
the trailer will stop normally.
there will be no emergency brakes.

6. When you turn suddenly while pulling doubles, which trailer is most likely to turn over?

The rear trailer is twice as likely to turn over as the tractor.
The front trailer is twice as likely to turn over as the tractor.
All trailers are equally likely to turn over.

7. When driving a combination vehicle, which of the following 2 things will help you prevent a rollover?

Keeping the cargo near the ground and driving slowly around turns.
Keeping cargo near the center of the vehicle and driving slowly on turns.
Keeping cargo near the center of the vehicle and driving slowly on the highway.

8. When transporting cargo, cargo securement must be checked within the first _____ miles of a trip and every _____ miles after.

9. The parking brake:

should be used whenever you park.
should be used when driving in bad weather.
should be used when you need to apply the brakes firmly.

10. If your cargo only fills one-third of the length of your trailer, make sure your cargo is:

to one side and as close to the ground as possible.
piled up high with heavy cargo on top.
centered and spread out as much as possible.

CDL COMBINATION PRACTICE TEST ARIZONA