Free California CDL Air Brakes Practice Test 2023

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The California 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 California CDL practice test questions are based on the California Commercial Driver's 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 with our free CDL Practice Test pack to get ready to pass the California CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2021 CA commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
CA 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:
During normal driving, spring brakes are usually held back by:
Air tanks need to be drained ______.
The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about ____ below the posted speed and release your brake.
To test the vehicle's service brakes, move the vehicle:
If you must make an emergency stop, you should brake so you:
When should the spring brakes activate?
When performing the controlled braking method for an emergency stop, you are _________.
If you must make an emergency stop, you should brake so you:
"Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the proper level of alcohol?"
If the spring brakes are on, when should you push the brake pedal?
Total stopping distance with air brakes is Perception distance + Braking Distance + Brake Lag Distance +:
Which of these is NOT a proper time to apply the parking brakes?
To stop the vehicle, the brake shoes and linings are pushed against:
In case of air pressure loss, a mechanical means of preventing the vehicle from moving is called:
To test the parking brake, stop the vehicle, put the parking brake on, and:
If you need to make an emergency stop, you should brake so that you can ________.
The air compressor is connected to the engine through ______.
Some vehicles are equipped with a separate air tank used specifically to release the spring brakes in an emergency, called a:
You should use the parking brake _____________.
Vehicles with air brakes _________.
To avoid damaging the brakes, what should you never do while the spring brakes are applied?
What is the purpose of an air storage tank?
Required on all vehicles with air brakes, what tells the driver that air pressure is too low?
What is an alternative name for a brake pedal?