- Updated for January 2025
- Based on 2025 MD commercial driver's license manual
Free Maryland CDL Air Brakes Test 2025
To make the most of your Maryland CDL, you should be able to drive CMVs with air brakes, which will necessitate your passing the MVA air brake knowledge test. Our Maryland CDL air brake practice test will help prepare you to do it. Its 30 multiple-choice questions are based on the air brake sections of the Maryland Commercial Driver License Manual. Read the explanation of each correct answer carefully, and practice this test as often as needed to feel comfortable with it. Soon, you will be prepared to pass your MVA air brake exam and become a safer CMV driver!
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual MD MVA exam
questions
correct answers to pass
passing score
Helpful links
List of questions (classic view)
- Which of the following is NOT part of the braking process when driving a tractor-trailer combination vehicle with an anti-lock braking system (ABS)?
- Which of the following can cause brakes to fade or fail?
- Which of the following is NOT part of the drum brake?
- The purpose of a supply pressure gauge is
- Why must you pass a knowledge test on air brakes?
- Spring brakes are
- The tractor protection valve
- If the air tanks are not drained,
- How can you tell if your vehicle is equipped with an anti-lock braking system (ABS)?
- At what measurement is the safety valve USUALLY set to open?
- Which vehicles must have low air pressure warning signals?
- Which of the following is NOT part of the air brake system?
- An anti-lock braking system (ABS)
- When should you use the parking brake?
- Which of the following will be true about your brake function if your anti-lock braking system (ABS) fails?
- When should you drain your air tanks?
- How do brakes work on a long, steep downgrade?
- Slack adjusters are
- Under which conditions are front wheel brakes good?
- Which of the following are true about a dual air brake system?
- After the initial drop, the maximum acceptable leakage rates per minute are
- What is the best way to test your vehicle's low air pressure warning signal?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- Which of the following should you do before leaving your vehicle unattended?
- How do you check your truck's slack adjusters?
- The low air pressure warning signal will come on before the pressure in the air tanks falls below
- A low pressure warning signal is required on
- All vehicles equipped with air brakes have
- With air brake-equipped vehicles, the parking brakes should be used
- The use of air brakes on a downgrade is only a supplement to the
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