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  • Updated for November 2024
  • Based on 2024 GA commercial driver's license manual

Free Georgia CDL Air Brakes Test 2024 | GA

The knowledge you have retained from studying air brakes will be tested today to allow you to become a safer driver. You will also be more prepared for the DDS exam by practicing often, until you achieve the score that you want. You should also pay close attention to the hitn and explanation with each question, so that you will be able to answer further questions about the same subjects that may be on the exam. Review your manual, practice early and often, and remember to drive safely!

Commercial Driver's License
  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
  • Triple-checked for accuracy

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.
Ensuring the accuracy and quality of our program is paramount. Learn more about our rigorous standards in our Commitment to Accuracy article.

What to expect on the actual GA DDS exam

25

questions

20

correct answers to pass

80%

passing score

List of questions (classic view)

  1. How would you check your truck's slack adjusters?
  2. Which of the following is NOT part of the air brake system?
  3. At what measurement is the safety valve USUALLY set to open?
  4. Which of the following are true about a dual air brake system?
  5. Slack adjusters are
  6. An antilock braking system (ABS)
  7. The purpose of a supply pressure gauge is
  8. Why must you pass a knowledge test on air brakes?
  9. Which vehicles must have low air pressure warning signals?
  10. How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
  11. Which of the following is NOT part of the drum brake?
  12. Spring brakes are
  13. Which conditions are front wheel brakes good under?
  14. When should you use the parking brake?
  15. Which of the following should you do before leaving your vehicle unattended?
  16. If the air tanks are not drained,
  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 is NOT part of the braking process when you're driving a tractor-trailer with an antilock braking system (ABS)?
  21. What is the best way to test if your vehicle's spring brakes come on automatically?
  22. What is the best way to test your vehicle's low air pressure warning signal?
  23. After the initial pressure drop, the maximum acceptable leakage rates per minute are
  24. Which of the following will be true about your brake function if your antilock braking system (ABS) fails?
  25. The tractor protection valve
  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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