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.
Air brakes consist of ________.
3.
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
4.
How far should manual slack adjusters move before they need to be adjusted?
5.
In a controlled braking emergency:
6.
Which braking system applies and releases the parking brakes when you use the parking brake control?
7.
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
8.
When parking a vehicle with a modulating control valve ________.
9.
If the low air warning comes on while you are driving, you should:
10.
What must the air pressure be, at minimum, in both parts of a dual air brake system?
11.
If the low air pressure warning light comes on, you should:
12.
Besides heat, another cause of brake fade is:
13.
What tells the driver how much air pressure is in the air tanks?
14.
The trailer air supply knob is usually:
15.
You should avoid using the parking brake when _______.
16.
Automatic air tanks _______.
17.
Brake drums should not have cracks longer than what length?
18.
Stop light switches are necessary because ________.
19.
If the air compressor has its own oil supply you should do what before driving?
20.
How often should alcohol containers be checked during cold weather?
21.
Air tanks should be drained:
22.
What is a wig wag ?
23.
Manual air tank drains require:
24.
Vehicles with ABS have malfunction lamps that are what color?
25.
On a long or steep downgrade, how should vehicle speed be primarily controlled?