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  • Updated for October 2024
  • Based on 2024 NJ commercial driver's license manual

Free New Jersey CDL Combination Practice Test 2024 | NJ

Driving combination vehicles can be an integral part your commercial driving career. Before you can reach that point though, you’ll need to pass an exam from your local branch of the New Jersey MVC showing that you’ve mastered the specialized knowledge necessary to drive these vehicles safely. The following 30 questions are from the official 2024 New Jersey CDL Manual, and cover just combination vehicles to help you prepare for this specific MVC test. Good luck both now on the practice exam and on your real exam when the time comes!

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 NJ MVC exam

20

questions

16

correct answers to pass

80%

passing score

List of questions (classic view)

  1. To drive, how high do you need to raise the landing gear?
  2. After coupling, how much space should there be between the lower and upper fifth wheel?
  3. To straighten out a jackknifing trailer, should you apply the trailer hand brake?
  4. When parking a vehicle that does not have spring brakes, you should use wheel chocks
  5. To prevent a rollover while driving a combination vehicle, you should
  6. What does the trailer air supply control do?
  7. What is the best way to test the trailer service brakes?
  8. What is the first step in coupling a tractor-semitrailer?
  9. If you use the trailer hand valve while you're driving,
  10. While uncoupling, what should you do AFTER you unlock the fifth wheel?
  11. Where would you find the shut-off valves?
  12. Which of the following control air in the service line?
  13. If you try to couple when the trailer is too high,
  14. When you check the lower fifth wheel, you do NOT need to make sure
  15. Which of the following types of vehicles are most likely to get stuck at a raised railroad crossing?
  16. Which of the following is most likely to roll over?
  17. Which of the following is NOT a purpose of the emergency air line?
  18. Which of the following is NOT a way to tell if your trailer is equipped with an antilock braking system (ABS)?
  19. Which of the following is NOT part of checking that air is flowing to all trailers?
  20. Which of the following is NOT part of inspecting the coupling?
  21. Which of the following is NOT part of testing the tractor protection valve?
  22. Which of the following statements about an antilock braking system (ABS) is FALSE?
  23. What is the definition of "off-tracking?"
  24. During a walk-around inspection of a combination vehicle, you should check to make sure that
  25. To back a trailer, what should you do?
  26. Loss of air pressure in the emergency line causes
  27. Which of these statements is true?
  28. If you cannot make a right turn without swinging into another lane, what should you do?
  29. If there is a major leak in the _________, the tractor protection valve will close and the trailer emergency brakes will come on.
  30. The rear wheels of which vehicle will off-track the most?
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