Free Maryland CDL Air Brakes Practice Test 2022

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

Our CDL practice tests:
Based on 2022 MD commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MD CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
To test air service brakes you should:
2.
Air brakes consist of ________.
3.
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
4.
The reduced stopping power caused by overuse of the service brakes and excessive heat is called:
5.
All air brake equipped vehicles have:
6.
The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about ____ below the posted speed and release your brake.
7.
Brake fade is caused by:
8.
In ideal conditions a truck or bus with air brakes going at 55 mph would require the stopping distance of how many feet?
9.
When should the spring brakes activate?
10.
What should a driver do when the low air pressure warning signal comes on?
11.
When you need to depress the brakes harder and harder just to maintain the same speed this means ______.
12.
If the air compressor should develop a leak, what keeps the air in the tanks?
13.
Spring brakes will come on automatically, but the parking brake can also be applied:
14.
The safety valve reduces pressure at ___ psi.
15.
When checking the air pressure buildup, pressure should build:
16.
After the initial pressure drop, air leakage for single vehicles should be less than:
17.
Automatic air tanks _______.
18.
Which of the following helps the stop light switch work?
19.
If air supply drops when driving, the tractor protection valve ________.
20.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
21.
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
22.
Air tanks should be drained:
23.
The governor stops the compressor from pumping air at:
24.
What happens when pressure is put on the air brakes?
25.
If your brakes are wet, what should you do to dry them quicker?