Free Louisiana CDL Air Brakes Practice Test 2023

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 2021 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
The most common type of foundation brakes are:
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks fall below ____ psi.
Excessive use of the service brakes results in overheating which can lead to:
A dual air brake system ________.
Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
The most important thing to do when a low air pressure warning comes on is:
What negatively affects the braking power of a spring brake?
In most newer vehicles, the parking brake control will be:
What happens when your brake drums get very hot?
The level at which the air compressor stops pumping air is:
After the initial pressure drop, air leakage for combination vehicles should be less than:
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
The most common problem found in roadside inspections is:
All of the following apply if the low air pressure warning signal does not work except:
If you need to make an emergency stop, you should brake so that you can ________.
The most common type of foundation brake is?
Why should you drain water from compressed air tanks?
Initial air leakage rate for combination vehicles should be:
Why do air brakes take longer to stop than hydraulic brakes?
The parking brake should be used:
In a dual air brake system, one system will typically control the rear brakes, and the other:
What is the function of a safety valve?
What happens when pressure is put on the air brakes?