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.
A low air pressure warning signal is ________.
2.
"A slack adjuster’s free play needs to be adjusted if it is more than about ______ when you pull hard on it."
3.
All air brake equipped vehicles have:
4.
When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?
5.
Excessive heat caused by using your brakes too often can also cause:
6.
The 3 individual systems of the air brakes are the service brakes, emergency brake, and:
7.
The main factor in causing brake fade is:
8.
With air brake vehicles, the parking brake should be used:
9.
Where is the modulating control valve located on some vehicles?
10.
When testing air leakage rates for single vehicles, initial loss rate should be less than:
11.
When you release the brakes and reduce the air pressure what makes up for that air loss?
12.
What should a driver do when the low air pressure warning signal comes on?
13.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
14.
If the low air warning comes on while you are driving, you should:
15.
The safety valve is set automatically when pressure is:
16.
When brakes are applied, the brake shoes will press against the:
17.
What must the air pressure be, at minimum, in both parts of a dual air brake system?
18.
The S-cam:
19.
In case of air pressure loss, a mechanical means of preventing the vehicle from moving is called:
20.
You should avoid using the parking brake when _______.
21.
Brake linings should not be _______.
22.
If air supply drops when driving, the tractor protection valve ________.
23.
The belt of a belt-driven air compressor should be ________.
24.
What brake system uses part of the service and parking brake systems to stop the vehicle in the event of a brake system failure?
25.
The governor stops the compressor from pumping air at: