Free Arizona CDL Air Brakes Practice Test 2022

Do you need an Air Brakes endorsement or L endorsement for your commercial driving license? The Arizona CDL Air Brake Test has some differences from other endorsements because your license will receive a mark of restriction if you fail the test. So having good preparation before exam day is very necessary. To ensure that our questions are relevant, all of our Arizona CDL practice test questions are based on the Arizona CDL manual. Each question has a detailed explanation for you to thoroughly learn the format and the topic. Don't be afraid of having a restriction on your license. Let’s try with our free CDL practice test to get ready to pass the Arizona Air Brake Test now. 

Our CDL practice tests:
Based on 2022 AZ commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
AZ CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
During normal driving, spring brakes are usually held back by:
2.
All air brake equipped vehicles have:
3.
The air brake lag distance at 55 mph on dry pavement adds about ____ feet.
4.
Air tanks need to be drained ______.
5.
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
6.
On a long or steep downgrade, the foot brakes should be used:
7.
Normally during anti-lock braking, the driver:
8.
When should the spring brakes activate?
9.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
10.
If the low air warning comes on while you are driving, you should:
11.
If you are driving down a steep downgrade and have reached your safe speed of 40 mph, you would apply the service brake until your speed dropped to ____ mph.
12.
If the low air pressure warning light comes on, you should:
13.
The parking brake should not be used when wet in freezing temperatures, or:
14.
If your vehicle has an alcohol evaporator, every day during cold weather you should:
15.
If you need to make an emergency stop, you should brake so that you can ________.
16.
At what level will the low air warning usually take effect?
17.
The most common type of foundation brake is?
18.
Why should you check the brake adjustment often?
19.
Which of the following helps the stop light switch work?
20.
The air compressor is connected to the engine through ______.
21.
Brake drums or discs _______.
22.
How often should alcohol containers be checked during cold weather?
23.
What is the purpose of a supply pressure gauge?
24.
Manual air tank drains require:
25.
Water and oil _______.