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.
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
2.
When inspecting air brakes:
3.
An air compressor can be cooled by _______.
4.
A mechanical device that drops a low air warning into a drivers view is called a:
5.
To make sure that the spring brakes come on automatically, do all of the following except:
6.
When the air system is low ________.
7.
Air governor cut-out should be at around:
8.
Some vehicles are equipped with a control allowing you to apply the spring brakes gradually, called a:
9.
What must the air pressure be, at minimum, in both parts of a dual air brake system?
10.
When checking the air pressure buildup, pressure should build:
11.
The emergency spring brake release knob is:
12.
How should the air leakage rate be tested?
13.
Automatic air tanks _______.
14.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
15.
Why should you drain water from compressed air tanks?
16.
The braking power of the spring brakes ______.
17.
Why do air brakes take longer to stop than hydraulic brakes?
18.
Initial air leakage rate for combination vehicles should be:
19.
The safety valve in the air compressor tank is set to open at _____.
20.
If the air compressor has its own oil supply you should do what before driving?
21.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
22.
What is the purpose of an air storage tank?
23.
Required on all vehicles with air brakes, what tells the driver that air pressure is too low?
24.
What is the function of a safety valve?
25.
If your brakes are wet, what should you do to dry them quicker?