Free Louisiana CDL Air Brakes Practice Test 2022

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The Louisiana 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 Louisiana CDL Book. 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 Louisiana CDL Practice Test to get ready to pass the Louisiana CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2022 LA commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
LA CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
If you do not have automatic tank drains, how often should you drain the oil and water from the bottom of compressed air storage tanks?
2.
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
3.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
4.
A low pressure warning signal could be __________.
5.
If your vehicle has an alcohol evaporator, it is there to:
6.
Why drain water from compressed air tanks?
7.
The brake system that applies and releases the brakes when the driver uses the brake pedal is the ________ brake system.
8.
When should the spring brakes activate?
9.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
10.
Which braking system applies and releases the parking brakes when you use the parking brake control?
11.
Air governor cut-out should be at around:
12.
When your brake's main air pressure is lost ________.
13.
The manual adjustment of automatic slack adjusters is:
14.
Total stopping distance with air brakes is Perception distance + Braking Distance + Brake Lag Distance +:
15.
The trailer air supply knob is usually:
16.
If your vehicle has an alcohol evaporator, every day during cold weather you should:
17.
Controlled braking is only possible _________.
18.
The brake pedal in an air brake system _______.
19.
At what level will the low air warning usually take effect?
20.
If one air system is very low on pressure _______.
21.
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:
22.
Some vehicles are equipped with a separate air tank used specifically to release the spring brakes in an emergency, called a:
23.
Vehicles with air brakes _________.
24.
Spring brakes are applied:
25.
What does ABS stand for?