Your Progress

  • 0 Correct
  • 0 Incorrect
  • 0 Skipped
10 mistakes allowed to pass
Challenge Bank™
View Handbook
5 /5
2 votes
Click a star to add your vote
  • Back to all tests
  • Score Page
  • View Handbook
  • 0 Correct
  • 0 Incorrect
  • 0 Skipped

BC Air Brake Test 5

  • Perfect for first-time and renewal commercial applicants, and those adding endorsements
  • Based on 2024 BC commercial driver's licence manual
  • Updated for July 2024
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
Unlock all questions with Premium
BC commercial driver's licence
5 out of 5,
2 votes
What you need to know

If you’re looking for a job in the trucking industry, completing the mandatory commercial driver’s licence knowledge exam is the first step towards achieving your dream. We have developed this 50-question Air Brake practice test to help you prepare for the province’s examination (also known as the British Columbia trucking exam). Regardless of your current level of knowledge, this test will help you brush up on some important rules. You will likely perform better on the written test if you have been studying for it, so this is why it is so important to maintain your studying regiment. Know the rules, and the road will be a much safer place. Scroll down to begin the test.

What to expect on the official exam



correct answers to pass


passing score

List of questions (classic view)
  1. How can you determine applied pushrod stroke?
  2. Which is least likely to cause brake drums to overheat?
  3. When must full braking capability be available?
  4. Assuming good traction and constant vehicle weight, if you double your vehicle's speed, your vehicle's braking distance will be
  5. Which of the following is an advantage of wedge brakes over S-cam drum brakes?
  6. Assuming good traction and constant vehicle speed, if you double your vehicle's weight, your vehicle's braking distance will be
  7. When inspecting air brakes, you should wear
  8. For inspecting the air brakes, when should you chock the wheels?
  9. How can automatic slack adjusters be adjusted?
  10. How should you test the spring brakes?
  11. Brake chambers of size 36 are marked with
  12. __________________are conected to the brake spider in "S" cam brake system.
  13. Automatic slack adjusters must be inspected
  14. Which of the following is most likely to have air brakes?
  15. It is preferable to test the brakes of towing vehicle with
  16. An antilock braking system (ABS)
  17. What to do when low air warning device activates on the road?
  18. The spring brakes are for
  19. Who can adjust the air brakes?
  20. How can you make sure that each air tank is securely attached to the vehicle?
  21. What does caging a brake chamber do?
  22. On a tractor-trailer, the red dashboard knob controls the spring brakes on __________, and the yellow dashboard knob controls the spring brakes on _________.
  23. Brakes are designed to withstand temperatures of up to
  24. DD3 safety actuators are mostly found in
  25. Trailer hand valve located on the tractor dashboard used to apply
  26. Which of the following is not a part of a braking system?
  27. How many airlines go to DD3 safety actuator brake chamber?
  28. Easiest way to test trailer`s spring brakes is
  29. Which of the following is most likely to lead to brake fade?
  30. When inspecting the air brake chambers, what should you look for?
  31. Brake fade can lead to
  32. Under the Ontario Highway Traffic Act, how often must air brakes be inspected?
  33. To test the trailer's service brakes independently of the tractor's service brakes, what should you do?
  34. When inspecting the brake drums, you should look for
  35. Under British Columbia law, how often must air brakes be inspected?
  36. If you uncouple and park an old, single-circuit trailer, you should do which of the following?
  37. When are you required to complete a pre-hill inspection?
  38. As air pressure builds during your pre-trip inspection of the air brakes, the low air pressure warning device should deactivate at
  39. While you're charging the trailer braking system, you find that the trailer brakes do not release. What are some possible causes?
  40. If you're using the pry method during your pre-trip inspection, pushrod travel must not exceed
  41. When brake drums overheat,
  42. When should you adjust an automatic slack adjuster?
  43. Where would an air dryer be installed in an air brake system?
  44. For large commercial vehicles, which of the following are advantages of air brakes as compared with hydraulic brakes?
  45. Why are drivers required to complete a trip inspection report?
  46. Why is it important for you to check the slack adjusters?
  47. Compounding the air brakes can
  48. In a tractor-trailer, the air pressure present in the service (control) line equals
  49. What is the maximum available pushrod stroke of a typical Type 30 brake chamber?
  50. When draining the air tanks, you observe excessive oil coming out of the supply tank. Which of the following is most likely to be faulty?
  51. You can usually make a normal stop by applying no more than
  52. The coil spring in most spring parking brake chambers can exert a force of
  53. Spring parking brakes typically require air pressures of at least _______ to completely release.
  54. In the air service circuit, there is a double (two-way) check valve connected to the primary and secondary service tanks. What does this valve do?
  55. In which of the following situations should a spring parking brake chamber be caged?
  56. In a tractor-trailer, an anti-compounding valve is connected to
  57. In Canada, automatic slack adjusters have been installed on trucks and trailers manufactured since
  58. When you use the free stroke (pry bar) method, the pushrod should not move more than
  59. In Canada, antilock braking systems (ABS) have been mandatory on all trucks and buses over 4,560 kg that have been manufactured since