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 reduced stopping power caused by overuse of the service brakes and excessive heat is called:
2.
A low pressure warning signal could be __________.
3.
When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?
4.
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
5.
Your truck has a dual air system and one of the systems loses its pressure. What will happen?
6.
With air brake vehicles, the parking brake should be used:
7.
When increased application pressure to maintain the same speed becomes necessary, you should ______.
8.
When testing air leakage rates for single vehicles, initial loss rate should be less than:
9.
Generally, air governor cut-in should be at:
10.
When you need to depress the brakes harder and harder just to maintain the same speed this means ______.
11.
Air governor cut-out should be at around:
12.
Some vehicles are equipped with a control allowing you to apply the spring brakes gradually, called a:
13.
Air braking takes more time than hydraulic braking because:
14.
Besides heat, another cause of brake fade is:
15.
The emergency spring brake release knob is:
16.
If your vehicle has an alcohol evaporator, every day during cold weather you should:
17.
Automatic air tanks _______.
18.
The most common type of foundation brake is?
19.
The air tanks must be drained because:
20.
Why should you drain water from compressed air tanks?
21.
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
22.
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
23.
Air tanks should be drained:
24.
What brake system uses part of the service and parking brake systems to stop the vehicle in the event of a brake system failure?
25.
What is the purpose of a supply pressure gauge?