# Free Arizona CDL Air Brakes Practice Test 2023

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 2021 AZ commercial driver's license manual
Perfect for first-time, renewal applicants
AZ CDL Air Brakes Test format:
25 questions
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.
Under normal conditions, in order to engage the parking brakes the driver should:
3.
Total stopping distance for air brakes is longer than that for hydraulic brakes due to ______ distance.
4.
Your truck has a dual air system and one of the systems loses its pressure. What will happen?
5.
The brake system that applies and releases the brakes when the driver uses the brake pedal is the ________ brake system.
6.
To stop the vehicle, air brakes systems use _______.
7.
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
8.
In most newer vehicles, the parking brake control will be:
9.
If you must make an emergency stop, you should brake so you:
10.
If the spring brakes are on, when should you push the brake pedal?
11.
When brakes are applied, the brake shoes will press against the:
12.
13.
All of the following apply if the low air pressure warning signal does not work EXCEPT:
14.
If one air system is very low on pressure _______.
15.
Stab braking should only be used:
16.
17.
Why should air tanks be drained completely?
18.
On large buses low pressure warning devices usually signal at ______.
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 _______.