FREE AZ CDL Doubles Triples Practice Test (2024)

1. When preparing to make a right turn, you should NOT turn wide to the left as you start the turn. Why?

It makes the turn harder.
A following driver may try to pass you on the right.
Turning wide to the left can cause your vehicle to tilt.

2. If your ABS malfunctions:

the service brake will not work.
you should immediately come to a complete stop.
you still have normal brake functions.

3. The earliest way to recognize that your trailer has started to skid is:

by releasing the brakes.
by checking the jackknife sensor.
by checking your mirrors.

4. To prevent rollover, you should:

drive slowly around corners.
drive in the left lane.
drive on the shoulder of the road when possible.

5. Texting while driving a CMV is:

acceptable if the message less than 140 characters.
acceptable if the message work-related.
prohibited.

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

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

7. When should you be particularly careful about high winds?

8. In a dual air brake system, if one air system is very low on pressure:

you should pump the brakes to restore pressure.
either the front or rear brakes will not be operating fully.
you should drive and brake as you always have.

9. How can you tell if a converter dollie has ABS?

There is an ABS plaque on the right side of the dolly.
There is a red lamp on the left side of the dolly.
There is a yellow lamp on the left side of the dolly.

10. When you push in the red trailer air supply knob, this will:

supply air to the emergency supply lines.
open the emergency line shut-off valve at the rear of the last trailer.
disconnect the air lines from the trailer.

ARIZONA DOUBLES TRIPLES PRACTICE CDL TEST