Free California CDL Air Brakes Practice Test 2022

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 2022 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
1.
Air tanks need to be drained ______.
2.
A dual air brake system ________.
3.
At 55 mph on dry pavement, the air brake lag distance is how many feet?
4.
To test the vehicle's service brakes, move the vehicle:
5.
On a long or steep downgrade, the foot brakes should be used:
6.
When you release the brakes and reduce the air pressure what makes up for that air loss?
7.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
8.
Another name for the brake pedal is the "foot valve", or:
9.
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
10.
Air governor cut-out should be at around:
11.
Why is manually adjusting automatic slack adjusters dangerous?
12.
The emergency spring brake release knob is:
13.
In case of air pressure loss, a mechanical means of preventing the vehicle from moving is called:
14.
On newer vehicles what color is the parking brake knob?
15.
How should the air leakage rate be tested?
16.
The most common type of foundation brake is?
17.
Some vehicles are equipped with a separate air tank used specifically to release the spring brakes in an emergency, called a:
18.
Initial air leakage rate for combination vehicles should be:
19.
Why should air tanks be drained completely?
20.
During a normal drive, the spring brakes are held back by _____.
21.
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
22.
What is used to put alcohol into the system and reduce ice risk?
23.
What does ABS stand for?
24.
What is the purpose of an air storage tank?
25.
Required on all vehicles with air brakes, what tells the driver that air pressure is too low?