Free Mississippi CDL Air Brakes Practice Test 2022

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The Mississippi 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 Mississippi 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 Mississippi CDL Practice Test to get ready to pass the Mississippi CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2022 MS commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MS 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.
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
3.
Air brakes consist of ________.
4.
If you do not have automatic tank drains, how often should you drain the oil and water from the bottom of compressed air storage tanks?
5.
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
6.
Why drain water from compressed air tanks?
7.
In a controlled braking emergency:
8.
The main factor in causing brake fade is:
9.
When should the spring brakes activate?
10.
When the safety valve releases air this indicates ___________.
11.
When you release the brakes and reduce the air pressure what makes up for that air loss?
12.
If the low air warning comes on while you are driving, you should:
13.
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.
14.
What happens when your brake drums get very hot?
15.
After the initial pressure drop, air leakage for single vehicles should be less than:
16.
The parking brake should not be used when wet in freezing temperatures, or:
17.
You should avoid using the parking brake when _______.
18.
Why does a heavily loaded vehicle need a longer distance to stop?
19.
In tractors and straight trucks spring brakes will come on fully when the air pressure drops to what range?
20.
The safety valve in the air compressor tank is set to open at _____.
21.
Brake drums or discs _______.
22.
What does ABS stand for?
23.
Manual air tank drains require:
24.
What is the purpose of an air storage tank?
25.
To test the parking brake you should _______.