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.
When inspecting air brakes:
2.
A low air pressure warning signal is ________.
3.
The reduced stopping power caused by overuse of the service brakes and excessive heat is called:
4.
A mechanical device that drops a low air warning into a drivers view is called a:
5.
When performing the controlled braking method for an emergency stop, you are _________.
6.
Generally, air governor cut-in should be at:
7.
In most newer vehicles, the parking brake control will be:
8.
When using a vehicle with air brakes, the parking needs to be used _______.
9.
When checking the air pressure buildup, pressure should build:
10.
In case of emergency stops, drivers should:
11.
Brake drums should not have cracks longer than what length?
12.
In a dual air brake system, if the air pressure in one part of the system drops enough to set off the low air warning:
13.
How are brakes designed?
14.
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
15.
The air tanks must be drained because:
16.
Why should you drain water from compressed air tanks?
17.
Why do air brakes take longer to stop than hydraulic brakes?
18.
On large buses low pressure warning devices usually signal at ______.
19.
The belt of a belt-driven air compressor should be ________.
20.
How often should alcohol containers be checked during cold weather?
21.
Air tanks should be drained:
22.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
23.
The spring brakes of a tractor will come on when the air pressure falls within _______.
24.
What is the function of a safety valve?
25.
If your brakes are wet, what should you do to dry them quicker?