- Updated for December 2024
- Based on 2024 VA commercial driver's license manual
Free Virginia CDL Air Brakes Test 2024
This is your chance to take a practice exam that will prepare you for the real Virgina DMV air brakes exam. Passing this DMV exam will open up new possibilities for your career as you will then be able to drive a much wider array of commercial vehicles, including those that have air brakes, such as certain models of trucks and passenger buses. These multiple-choice questions is based directly on those found within the Virginia Commercial Driver’s Manual, so make sure that you read each explanation closely and carefully. They have been designed to give you the maximum amount of condensed information so that you can answer future questions correctly on your real DMV air brakes exam. Come back to these site to practice as often as necessary, until you accomplish two important goals: achieving a high score and feeling comfortable with the subject matter. Once you do that, you’ll pass the real CDL air brakes exam with ease. Good luck now and on the future exam, and remember to drive safely!
- 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 VA DMV exam
questions
correct answers to pass
passing score
Helpful links
List of questions (classic view)
- When should you use the parking brake?
- At what measurement is the safety valve USUALLY set to open?
- Which of the following is NOT part of the air brake system?
- Slack adjusters are
- Which of the following can cause brakes to fade or fail?
- How would you check your truck's slack adjusters?
- Why must you pass a knowledge test on air brakes?
- Which vehicles must have low air pressure warning signals?
- What is the best way to test your vehicle's low air pressure warning signal?
- Under which conditions are front wheel brakes good?
- The purpose of a supply pressure gauge is
- How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
- An antilock braking system (ABS)
- After the initial drop, the maximum acceptable leakage rates per minute are
- If the air tanks are not drained,
- Which of the following is NOT part of the braking process when you're driving a tractor-trailer combination vehicle with an antilock braking system (ABS)?
- Which of the following will be true about your brake function if your antilock braking system (ABS) fails?
- Which of the following should you do before leaving your vehicle unattended?
- Spring brakes are
- What is the best way to test if your vehicle's spring brakes come on automatically?
- How do brakes work on a long, steep downgrade?
- Which of the following is NOT part of the drum brake?
- Which of the following are true about a dual air brake system?
- The tractor protection valve
- When should you drain your air tanks?
- 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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