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.
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
2.
Your truck or bus has a dual air brake system. If a low-pressure warning comes on for only one system, what should you do?
3.
The stop light switch:
4.
A low pressure warning signal could be __________.
5.
In case of a low air situation, the spring brakes should come on at:
6.
The supply pressure gauge shows how much pressure:
7.
The ____ shows how much pressure is in the air tanks.
8.
What negatively affects the braking power of a spring brake?
9.
When testing air leakage rates for single vehicles, initial loss rate should be less than:
10.
When performing the controlled braking method for an emergency stop, you are _________.
11.
When you need to depress the brakes harder and harder just to maintain the same speed this means ______.
12.
"Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the proper level of alcohol?"
13.
The parking brake knob is usually:
14.
Besides heat, another cause of brake fade is:
15.
If air pressure is not built up within the correct amount of time, then:
16.
Average stopping distance under normal conditions at 55 mph is:
17.
A device that limits the amount of air provided to the front brakes is a:
18.
In a dual air brake system, if the air pressure in one part of the system drops enough to set off the low air warning:
19.
The air tanks must be drained because:
20.
Brake linings should not be _______.
21.
How does the antilock brake system benefit the driver?
22.
Stop light switches are necessary because ________.
23.
What does the air compressor governor control?
24.
A warning to drivers behind you that the air brakes have been applied is the:
25.
On a long or steep downgrade, how should vehicle speed be primarily controlled?