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 automatic wig wag will rise out of your view when the pressure in your system rises above what psi?
2.
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
3.
The stop light switch:
4.
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
5.
In case of a low air situation, the spring brakes should come on at:
6.
In a controlled braking emergency:
7.
The main factor in causing brake fade is:
8.
The application pressure gauge shows how much air pressure you:
9.
What should a driver do when the low air pressure warning signal comes on?
10.
Some vehicles are equipped with a control allowing you to apply the spring brakes gradually, called a:
11.
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
12.
The safety valve reduces pressure at ___ psi.
13.
When brakes are applied, the brake shoes will press against the:
14.
If the low air pressure warning light comes on, you should:
15.
Besides heat, another cause of brake fade is:
16.
The trailer air supply knob is usually:
17.
If your vehicle has an alcohol evaporator, every day during cold weather you should:
18.
Automatic air tanks _______.
19.
The air tanks must be drained because:
20.
The braking power of the spring brakes ______.
21.
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
22.
How often should alcohol containers be checked during cold weather?
23.
On large buses low pressure warning devices usually signal at ______.
24.
What is the purpose of a supply pressure gauge?
25.
Water and oil _______.