Free Alabama CDL Air Brakes Practice Test 2022

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The Alabama 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 CDL practice test packs are based on the Alabama 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 our Alabama CDL practice test to get ready to pass your Alabama CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2022 AL commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
AL CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
A low pressure warning signal could be __________.
2.
Brake fade is caused by:
3.
When increased application pressure to maintain the same speed becomes necessary, you should ______.
4.
When you need to apply more pressure to help your brakes work normally effectively, this means that your brakes are fading. Which of the following can cause fading brakes?
5.
Another name for the brake pedal is the "foot valve", or:
6.
Which braking system applies and releases the parking brakes when you use the parking brake control?
7.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
8.
If the low air pressure warning light comes on, you should:
9.
The emergency spring brake release knob is:
10.
What tells the driver how much air pressure is in the air tanks?
11.
To test the parking brake, stop the vehicle, put the parking brake on, and:
12.
All of the following apply if the low air pressure warning signal does not work except:
13.
The brake pedal in an air brake system _______.
14.
Automatic air tanks _______.
15.
On newer vehicles what color is the parking brake knob?
16.
Why does a heavily loaded vehicle need a longer distance to stop?
17.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
18.
Brake linings should not be _______.
19.
Vehicles with air brakes _________.
20.
What is the purpose of a supply pressure gauge?
21.
The parking brake should be used:
22.
Manual air tank drains require:
23.
What is an alternative name for a brake pedal?
24.
Water and oil _______.
25.
The warning light and buzzer will come on when the air pressure in either system drops below what psi?