CDL Air Brake Test - Air Brake Practice Test

In order to operate a bus or truck that has air brakes, you will be required to learn the information contained in the DMV’s CDL Air Brakes section of the study manual. In order to be qualified and licensed to pull a trailer with air brakes, you must also learn the information the Combined Vehicles section of the manual. Air brakes use compressed air to make the vehicle’s braking system work. This type of braking is very effective for safely and effectively stopping large vehicles. Due to their importance, air brakes are checked regularly to ensure that they are in good working order. The CDL Air Brake Test differs from the endorsement tests in that the Air Brakes Test serves as a restriction rather than an endorsement.

You absolutely must be able to pass the Air Brakes Test. Otherwise, your CDL will bear a restrictive mark indicating that you are not authorized to drive a vehicle of any kind with air brakes.

Choose Your Free Air Brake Practice Test Below:

CDL Air Brakes Practice Test 01

Before you apply, take this CDL air brakes practice test to find out if you’re ready for the actual test. Studying is the only way to succeed.

CDL Air Brakes Practice Test 02

You cannot drive a vehicle equipped with this type of brakes unless you have passed a written air brakes test. Try our free practice test.

CDL Air Brakes Practice Test 03

The first thing you will have to do is pay a fee to apply for the air brakes endorsement before you can take the written Air Brake CDL Test.

CDL Air Brakes Practice Test 04

Try our free CDL practice test air brakes now we have 110 questions in our online database. Good luck with your Air Brakes test!

Eligibility for CDL Air Brake Test

CDL Air Brake Test - Air Brake Practice TestYou will, of course, need to have some driving skills before you seat for a CDL air brake test. Then you will need to have an understanding of the braking supply system. In this case, you need to understand that air is pumped into the braking supply system from the atmosphere. You should know how it passes through filters and dries before it is stored in the main reservoir.

To be eligible for CDL air brake test, you should understand how air is maintained and the constant pressure to drive under. The constant pressure is normally around 125 psi. Maintenance will be needed the pressure mounts at 150 psi.

You should have an understanding of the parking brake. This is a safety feature of an air brake system. This is a spring-actuated brake that prevents the vehicle from moving. It is normally engaged by default. The air that mounts in the braking system pulls the spring open and disengages the brake.

To be eligible for the air brake endorsement on your CDL, you must have the basic knowledge of other parts of a truck that power the brakes other than just the compressed air. It is important to understand that pedals and the gearbox system use compressed air to amplify and assist the input of the driver.

The cost of a CDL air brake endorsement
normally, there is a fee charged by the state Department of Public Safety and Correctional Services for the HAZMAT background record check. The TSA processing fee and the state and federal background checks have been reduced to $88.75. It is also important to understand that there is a fee charged for correcting a CDL or adding an endorsement. However, no charges will apply if you were required to obtain a commercial learner’s permit.


This Air Brake Practice Test Covers:

Air Brake System Parts
Dual Air Brake Systems
Inspecting Air Brakes
Using Air Brakes




CDL Air Brake Test
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