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.
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?
2.
When inspecting air brakes:
3.
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
4.
The most important thing to do when a low air pressure warning comes on is:
5.
A mechanical device that drops a low air warning into a drivers view is called a:
6.
If you must make an emergency stop, you should brake so you:
7.
To make sure that the spring brakes come on automatically, do all of the following except:
8.
The type of brakes that clamp the rotor between the brake shoes is:
9.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
10.
In most newer vehicles, the parking brake control will be:
11.
All of the following are factors in total stopping distance except:
12.
If your truck has a dual air brake system, and one of the systems is low on pressure:
13.
Air braking takes more time than hydraulic braking because:
14.
Under normal braking conditions, the vehicle:
15.
To test the parking brake, stop the vehicle, put the parking brake on, and:
16.
The brake pedal in an air brake system _______.
17.
The service brake system ________.
18.
If one air system is very low on pressure _______.
19.
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:
20.
Why do air brakes take longer to stop than hydraulic brakes?
21.
How does the antilock brake system benefit the driver?
22.
During a normal drive, the spring brakes are held back by _____.
23.
Manual air tank drains require:
24.
What is the purpose of an air storage tank?
25.
To test the parking brake you should _______.