Free South Carolina CDL Air Brakes Practice Test 2022

Do you need a South Carolina Air Brakes endorsement or an L endorsement for your commercial driving license? The South Carolina 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 CDL practice test packs are based on the SC CDL 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 our SC CDL Practice Test to get ready to pass the South Carolina CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2022 SC commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
SC CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
To test air service brakes you should:
2.
The air compressor stops pumping air at what psi?
3.
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
4.
All air brake equipped vehicles have:
5.
Excessive heat caused by using your brakes too often can also cause:
6.
Why drain water from compressed air tanks?
7.
If your vehicle has an alcohol evaporator, it is there to:
8.
When should the spring brakes activate?
9.
Generally, air governor cut-in should be at:
10.
When you release the brakes and reduce the air pressure what makes up for that air loss?
11.
Air governor cut-out should be at around:
12.
It is not safe to drive a vehicle that has brake drums with cracks that are longer than _____ of the width of the friction area.
13.
What happens when your brake drums get very hot?
14.
The level at which the air compressor stops pumping air is:
15.
Average stopping distance under normal conditions at 55 mph is:
16.
A device that limits the amount of air provided to the front brakes is a:
17.
If your vehicle has an alcohol evaporator, every day during cold weather you should:
18.
You should avoid using the parking brake when _______.
19.
How are brakes designed?
20.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
21.
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
22.
Automatic adjusters should ________.
23.
Air tanks should be drained:
24.
Spring brakes are applied:
25.
What brake system uses part of the service and parking brake systems to stop the vehicle in the event of a brake system failure?