Your Progress

  • 0 Incorrect (6 allowed to pass)
  • 0 Correct
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
  • 0 Incorrect (6 allowed to pass)
  • 0 Correct
Restart
 
 
 
 
 
Ask DMV Genie AI
new
Back to Program Home
  • Updated for December 2024
  • Based on 2024 ND commercial driver's license manual

Free North Dakota CDL Air Brakes Test 2024

Today, you will have an opportunity to take a practice quiz on an important area of commercial vehicle driving: air brakes. Passing the DMV exam about this subject will allow you to get a CDL without an air brake restriction and will open up more career opportunities. The 30 multiple-choice questions on this practice exam are based on practice problems provided in the North Dakota Commercial Drivers License Guide, so pay close attention not only to the questions, but read each explanation provided, as it will help you understand the subject material you will need to pass the real DMV exam. Practice as often as necessary until you feel comfortable, good luck both now and on that future exam, 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 ND DOT exam

25

questions

20

correct answers to pass

80%

passing score

List of questions (classic view)

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

Your go-to, trusted source

Experience the Driving-Tests difference
Since our foundation in 2010, Driving-Tests.org has led the way in online driver's education, with over a decade of experience. Our dedicated experts, bringing together more than 50 years of collective expertise, have established us as the largest non-governmental organization in the U.S. solely focused on driver education. We go beyond the official manuals, offering unique interactive experiences and support like audio guides and an AI Assistant, to cater to different learning styles and needs.
Helping hundreds of thousands to ace their tests, our resources have earned a 4.7-star rating from over 14,500 reviews. Our goal is to make your path to becoming a confident driver as straightforward and effective as possible.