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 safety valve discharges automatically at the pressure of:
2.
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
3.
A low air pressure warning signal is ________.
4.
The stop light switch:
5.
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
6.
Emergency stab braking is:
7.
Spring brakes will generally come on at:
8.
The low air pressure warning signal indicates:
9.
When you need to apply more pressure to help your brakes work normally effectively, this means that your brakes are fading. Which of the following can cause fading brakes?
10.
Normally during anti-lock braking, the driver:
11.
If the air compressor should develop a leak, what keeps the air in the tanks?
12.
If you must make an emergency stop, you should brake so you:
13.
If the low air pressure warning light comes on, you should:
14.
If air pressure is not built up within the correct amount of time, then:
15.
A device that limits the amount of air provided to the front brakes is a:
16.
After the initial pressure drop, air leakage for combination vehicles should be less than:
17.
Under normal braking conditions, the vehicle:
18.
If you need to make an emergency stop, you should brake so that you can ________.
19.
On newer vehicles what color is the parking brake knob?
20.
Why should you check the brake adjustment often?
21.
The braking power of the spring brakes ______.
22.
Automatic adjusters should ________.
23.
What is used to put alcohol into the system and reduce ice risk?
24.
The warning light and buzzer will come on when the air pressure in either system drops below what psi?
25.
What is the function of a safety valve?