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.
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
2.
What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus?
3.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
4.
During normal driving, spring brakes are usually held back by:
5.
Your brakes are fading when:
6.
The low air pressure warning signal indicates:
7.
With air brake vehicles, the parking brake should be used:
8.
To make sure that the spring brakes come on automatically, do all of the following except:
9.
What should a driver do when the low air pressure warning signal comes on?
10.
When you need to depress the brakes harder and harder just to maintain the same speed this means ______.
11.
What is a \"Wig Wag\"
12.
If the low air pressure warning light comes on, you should:
13.
Besides heat, another cause of brake fade is:
14.
If you need to make an emergency stop, you should brake so that you can ________.
15.
On newer vehicles what color is the parking brake knob?
16.
The service brake system ________.
17.
In dual air systems, how long should it take air pressure to build 85 to 100 psi?
18.
The most common type of foundation brake is?
19.
At minimum, a dual air system should build up to what psi in the primary and secondary systems?
20.
The air tanks must be drained because:
21.
Why should you drain water from compressed air tanks?
22.
To avoid damaging the brakes, what should you never do while the spring brakes are applied?
23.
Water and oil _______.
24.
Vehicles with air brakes have pressure gauges connected to the _______.
25.
What happens when pressure is put on the air brakes?