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.
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
2.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
3.
How far should manual slack adjusters move before they need to be adjusted?
4.
On a long or steep downgrade, the foot brakes should be used:
5.
In a controlled braking emergency:
6.
To stop the vehicle, air brakes systems use:
7.
When the engine is off and the parking brake released, a single vehicle air loss rate should be less than ________ psi in one minute.
8.
Where is the modulating control valve located on some vehicles?
9.
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
10.
What is the purpose of an antilock braking system (ABS)?
11.
All of the following are factors in total stopping distance except:
12.
The parking brake should not be used when wet in freezing temperatures, or:
13.
The manual adjustment of automatic slack adjusters is:
14.
The trailer air supply knob is usually:
15.
In case of air pressure loss, a mechanical means of preventing the vehicle from moving is called:
16.
You should avoid using the parking brake when _______.
17.
If you need to make an emergency stop, you should brake so that you can ________.
18.
How should the air leakage rate be tested?
19.
The service brake system ________.
20.
Pushing the brake pedal down harder __________.
21.
How does the antilock brake system benefit the driver?
22.
Automatic adjusters should ________.
23.
What brake system uses part of the service and parking brake systems to stop the vehicle in the event of a brake system failure?
24.
What is a wig wag ?
25.
Vehicles with ABS have malfunction lamps that are what color?