Free Mississippi CDL Air Brakes Practice Test 2023

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 2021 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
The air compressor stops pumping air at what psi?
An automatic wig wag will rise out of your view when the pressure in your system rises above what psi?
To test air service brakes you should:
What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus?
Your truck or bus has a dual air brake system. If a low-pressure warning comes on for only one system, what should you do?
How far should manual slack adjusters move before they need to be adjusted?
To test the vehicle's service brakes, move the vehicle:
Total stopping distance for air brakes is longer than that for hydraulic brakes due to ______ distance.
To make sure that the spring brakes come on automatically, do all of the following except:
To stop the vehicle, air brakes systems use:
What should a driver do when the low air pressure warning signal comes on?
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
The safety valve is set automatically when pressure is:
Which of these is NOT a proper time to apply the parking brakes?
What tells the driver how much air pressure is in the air tanks?
Pressing and releasing the brake pedal unnecessarily:
The trailer air supply knob is usually:
To stop the vehicle, the brake shoes and linings are pushed against:
To test the parking brake, stop the vehicle, put the parking brake on, and:
If one air system is very low on pressure _______.
The belt of a belt-driven air compressor should be ________.
During a normal drive, the spring brakes are held back by _____.
What is an alternative name for a brake pedal?
Vehicles with air brakes have pressure gauges connected to the _______.