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 air compressor stops pumping air at what psi?
2.
To test air service brakes you should:
3.
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
4.
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
5.
When inspecting air brakes:
6.
An air compressor can be cooled by _______.
7.
Spring brakes will generally come on at:
8.
With air brake vehicles, the parking brake should be used:
9.
To make sure that the spring brakes come on automatically, do all of the following except:
10.
Another name for the brake pedal is the "foot valve", or:
11.
Air governor cut-out should be at around:
12.
It is not safe to drive a vehicle that has brake drums with cracks that are longer than _____ of the width of the friction area.
13.
The air compressor governor controls:
14.
The emergency spring brake release knob is:
15.
In case of emergency stops, drivers should:
16.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
17.
Why do air brakes take longer to stop than hydraulic brakes?
18.
Initial air leakage rate for combination vehicles should be:
19.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
20.
The safety valve in the air compressor tank is set to open at _____.
21.
Air tanks should be drained:
22.
What brake system uses part of the service and parking brake systems to stop the vehicle in the event of a brake system failure?
23.
To prevent too much pressure from building up in the system, what is installed?
24.
What is the purpose of an air storage tank?
25.
Required on all vehicles with air brakes, what tells the driver that air pressure is too low?