AB Air Brake Test 3 2025

1. The air compressor should be inspected only when
2. Each brake lining should be at least _______ thick.
3. In an S-cam drum brake, which of the following is connected to the brake spider?
4. A brake shoe is not a part of
5. Brake chambers are found on
6. It does not matter if a small amount of oil is discovered during drainage of
7. Compressed air from the air compressor first goes to the
8. Compressed air exhaust is
9. Compressed air entering the brake chambers applies
10. Evacuating air from the brake chambers will apply
11. A brake lining that has become contaminated with oil or grease indicates a problem with the
12. An air line shows signs of wear from rubbing, but there are no leaks because the inner tube is still in good shape. What should you do?
13. An alcohol evaporator (injector) or air dryer can
14. Which tank is likely to collect the most moisture?
15. Your vehicle will fail the air tank drain valve test if
16. There is a split-second delay in activation of _________. There is no delay in activation of _________.
17. The braking system converts the kinetic energy of the moving vehicle into
18. When you drain the air tanks, which tank should you drain first?
19. What is the purpose of the governor?
20. The air compressor is powered by the
21. Air pressure monitoring gauges are located on the _________ of the vehicle.
22. The pushrod stroke occurs when compressed air enters
23. When you press the brake pedal, the valve underneath the brake pedal ________ to apply the service brakes.
24. Which of the following is part of a disc brake?
25. If the low air pressure warning signal comes on, what should you do?
26. In a tractor-trailer, an anti-compounding valve is connected to
27. In Canada, automatic slack adjusters have been installed on trucks and trailers manufactured since
28. When you use the free stroke (pry bar) method, the pushrod should not move more than
29. If your vehicle is equipped with automatic slack adjusters, why must you fully apply the service brakes regularly?
30. In Canada, antilock braking systems (ABS) have been mandatory on all trucks and buses over 4,560 kg that have been manufactured since
31. What is the "cut-in" level?
32. Normally, who can adjust automatic slack adjusters?
33. Which statement is true of spring brakes?
34. Which colour coding is usually employed for the service line?
35. Why are there two service tanks in a modern air brake system?
36. What is a "glad hand"?
37. What function does the alcohol evaporator perform?
38. To inspect an air brake system, you should wear
39. When must you chock the wheels of your stopped vehicle?
40. Finding a small bit of oil during an inspection is NOT serious if it's coming from
41. When inspecting the brake chambers, you should check for which of the following?
42. Cut-in pressure must never be lower than
43. What colour is the parking brake control button?
44. In an air brake system, spring brakes are intended for
45. The pushrod stroke occurs when compressed air enters the
46. Besides direct air pressure change, what other factors can interfere with the air pressure flow?
47. What is the main aim of the practical exam?
48. How frequently should a student execute a pre-trip air brake system check during the course?
49. Can instructors assist students during individual procedures?
50. When is it possible to request the Registry Agent to apply the endorsement or licence upgrade?