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  • Updated for December 2024
  • Based on 2024 NY commercial driver's license manual

Free New York CDL Air Brakes Test 2024

This is your opportunity to take a practice exam that will prepare you for the real New York DMV air brakes exam. Passing the DMV exam will open up new possibilities for your career as you will then be able to drive vehicles that have air brakes, from a wide range of trucks to passenger buses. The 30 multiple-choice questions on this practice exam are based directly on those found in the New York State DMV Commercial Driver’s Manual, so make sure that you read each explanation carefully, as they are designed to give you the information you need to answer future questions correctly on your real DMV air brakes exam. Practice as often as necessary, until you both achieve a high score and feel comfortable with the subject matter. Then in no time at all, you’ll pass the real CDL air brakes exam with ease. Good luck and drive safely!

  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements

What you need to know

9 min to complete
Available in EN and ES
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.

What to expect on the actual NY DMV exam

25

questions

20

correct answers to pass

80%

passing score

List of questions (classic view)

  1. When should you use the parking brake?
  2. At what measurement is the safety valve USUALLY set to open?
  3. After the initial drop, the maximum acceptable leakage rates per minute are
  4. What is the best way to test your vehicle's low air pressure warning signal?
  5. How would you check your truck's slack adjusters?
  6. 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)?
  7. If the air tanks are not drained,
  8. Why must you pass a knowledge test on air brakes?
  9. Which vehicles must have low air pressure warning signals?
  10. Slack adjusters are
  11. How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
  12. The tractor protection valve
  13. An antilock braking system (ABS)
  14. Which of the following is NOT part of the air brake system?
  15. Which of the following is NOT part of the drum brake?
  16. Which of the following will be true about your brake function if your antilock braking system (ABS) fails?
  17. How do brakes work on a long, steep downgrade?
  18. Which of the following can cause brakes to fade or fail?
  19. When should you drain your air tanks?
  20. Which of the following are true about a dual air brake system?
  21. Spring brakes are
  22. Which of the following should you do before leaving your vehicle unattended?
  23. The purpose of a supply pressure gauge is
  24. What is the best way to test if your vehicle's spring brakes come on automatically?
  25. Under which conditions are front wheel brakes good?
  26. The low air pressure warning signal will come on before the pressure in the air tanks falls below
  27. A low pressure warning signal is required on
  28. All vehicles equipped with air brakes have
  29. With air brake-equipped vehicles, the parking brakes should be used
  30. The use of air brakes on a downgrade is only a supplement to the
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