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.
An automatic wig wag will rise out of your view when the pressure in your system rises above what psi?
2.
A low air pressure warning signal is ________.
3.
The 3 individual systems of the air brakes are the service brakes, emergency brake, and:
4.
To stop the vehicle, air brakes systems use:
5.
Where is the modulating control valve located on some vehicles?
6.
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
7.
When parking a vehicle with a modulating control valve ________.
8.
Why is manually adjusting automatic slack adjusters dangerous?
9.
Pressing and releasing the brake pedal unnecessarily:
10.
In a dual air brake system, the first system, supplying the rear brakes, is commonly known as the "primary" system, and the other as the:
11.
After the initial pressure drop, air leakage for combination vehicles should be less than:
12.
Under normal braking conditions, the vehicle:
13.
The brake pedal in an air brake system _______.
14.
If one air system is very low on pressure _______.
15.
How are brakes designed?
16.
Stab braking should only be used:
17.
Automatic adjusters should ________.
18.
Why should air tanks be drained completely?
19.
You should use the parking brake _____________.
20.
Spring brakes are applied:
21.
What is proper braking technique for drivers travelling down a hill or any other downgrade?
22.
The spring brakes of a tractor will come on when the air pressure falls within _______.
23.
Typically, at what psi does the air compressor governor stop the compressor from pumping air?
24.
Vehicles with air brakes have pressure gauges connected to the _______.
25.
To test the parking brake you should _______.