Free Michigan CDL Air Brakes Practice Test 2023

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

Our CDL practice tests:
Based on 2021 MI commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MI CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus?
When inspecting air brakes:
The air brake lag distance at 55 mph on dry pavement adds about ____ feet.
At 55 mph on dry pavement, the air brake lag distance is how many feet?
Excessive heat caused by using your brakes too often can also cause:
The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below ___ psi.
The main factor in causing brake fade is:
In ideal conditions a truck or bus with air brakes going at 55 mph would require the stopping distance of how many feet?
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?
When does the air compressor governor allow air to start pumping?
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
Why is manually adjusting automatic slack adjusters dangerous?
When checking the air pressure buildup, pressure should build:
In case of emergency stops, drivers should:
Under normal braking conditions, the vehicle:
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
With air brake vehicles, the parking brakes should be used:
Why should you check the brake adjustment often?
In a dual air brake system, if the air pressure in one part of the system drops enough to set off the low air warning:
The braking power of the spring brakes ______.
If air supply drops when driving, the tractor protection valve ________.
Stab braking should only be used:
How does the antilock brake system benefit the driver?
What is proper braking technique for drivers travelling down a hill or any other downgrade?