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.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
2.
The reduced stopping power caused by overuse of the service brakes and excessive heat is called:
3.
A mechanical device that drops a low air warning into a drivers view is called a:
4.
While applying the brakes, what tells the driver how much air pressure is being used?
5.
The low air pressure warning signal indicates:
6.
When the engine is off and the parking brake released, a single vehicle air loss rate should be less than ________ psi in one minute.
7.
When the air system is low ________.
8.
When increased application pressure to maintain the same speed becomes necessary, you should ______.
9.
The type of brakes that clamp the rotor between the brake shoes is:
10.
Generally, air governor cut-in should be at:
11.
In most newer vehicles, the parking brake control will be:
12.
The manual adjustment of automatic slack adjusters is:
13.
Average stopping distance under normal conditions at 55 mph is:
14.
The most common problem found in roadside inspections is:
15.
All of the following apply if the low air pressure warning signal does not work except:
16.
The brake pedal in an air brake system _______.
17.
The service brake system ________.
18.
Pushing the brake pedal down harder __________.
19.
At what level will the low air warning usually take effect?
20.
If one air system is very low on pressure _______.
21.
Automatic adjusters should ________.
22.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
23.
The parking brake should be used:
24.
What is the function of a safety valve?
25.
What happens when pressure is put on the air brakes?