Air Brake Review Test
This practice test is designed to help you prepare for the Air Brake written test. Once you have completed the test, you may view your test results to see which questions were answered incorrectly.

A score of 80% is required to pass the test.

In other words: You must get at least 72 correct answers, or no more than 18 incorrect answers on this test to pass.

You may retake the test as often as you like. GOOD LUCK!!!
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1 point
1. When a trailer's service brakes fail to apply, the trailer spring brakes can be applied using the: *
1 point
2. "S" cam brake components include: *
1 point
3. Disc brake components include: *
1 point
4. Wedge brake components include: *
1 point
5. Brakes convert the energy of a moving vehicle into: *
1 point
6. Hydraulic brake systems use: *
1 point
7. The brake system on most large commercial vehicles use: *
1 point
8. When air brakes are applied or released, the brakes will respond: *
1 point
9. A vehicle's brakes must do more work when: *
1 point
10. High brake temperatures can result from: *
1 point
11. When a vehicle's brakes do not comply with the Ontario Highway Traffic act and regulations: *
1 point
12. Drivers must be careful when conducting an inspection of the air brake system to avoid: *
1 point
13. When inspecting the brake chambers, the driver must look for: *
1 point
14. When inspecting the air compressor drive belt, the driver must look for: *
1 point
15. If a vehicle moves while the spring brakes are applied, the vehicle has: *
1 point
16. While draining a vehicle's air tanks, the driver must watch the: *
1 point
17. An air tank drain valve that fails to function: *
1 point
18. A reliable method for inspecting brake adjustment is: *
1 point
19. When measuring the applied pushrod stroke, air pressure must be between: *
1 point
20. A brake is out of adjustment when: *
1 point
21. The type of air brake components on most large commercial vehicles are either: *
1 point
22. The air that exhausts from an air brake system can carry: *
1 point
23. Air compressors: *
1 point
24. Air compressors are powered directly by the engine or using: *
1 point
25. Air compressors are mounted directly onto the engine by using: *
1 point
26. A governor controls an air compressor's: *
1 point
27. The normal operating pressure range for air brake systems is: *
1 point
28. Driving a vehicle with the air brake system that is outside the normal operation pressure range is: *
1 point
29. When a brake chamber pushrod stroke exceeds the adjustment limit: *
1 point
 30. Air brake systems must comply with the Ontario Highway Traffic Act and regulations: *
1 point
31. When conducting an inspection of the air brake system, the vehicle should be parked securely on a... *
1 point
32. When inspecting the brake chambers on each side of a steering axle, the driver must ensure that slack adjusters are: *
1 point
33. When inspecting the air tanks, the driver must look for: * *
1 point
34. To test air pressure build-up time, the engine must be running at... *
1 point
35. The low air warning device must activate before air pressure drops to: *
1 point
36. An air compressor governor should cut-in approximately 138 to 173 kPa (20 to 25 psi): *
1 point
37. When a driver finds a brake that is out of adjustment: *
1 point
38. Repair and re-adjustment of all types of air brakes may be performed by: *
1 point
39. Drivers who are certified to re-adjust air brakes may do so on: *
1 point
The compressed air in the air brake system is stored in: *
1 point
41. Air tanks must be drained regularly because: *
1 point
42. To check the air pressure in a vehicle's air brake system, a driver... *
1 point
43. Vehicles with air brakes must have air pressure gauges that indicate the pressure in the: *
1 point
44. Safety valves prevent: *
1 point
45. When a low air pressure warning device activates, the driver must: *
1 point
46. An air dryer removes moisture, which is expelled when the: *
1 point
47. Alcohol evaporators may be used to: *
1 point
 48. Using anti-lock braking systems (ABS) to prevent the wheels from locking: *
1 point
49. To prevent vehicle movement during an inspection of the air brake system, a driver should use: *
1 point
50. When inspecting brake drums and rotors, the driver must look for: *
1 point
51. When inspecting visible air brake hoses and tubes, the driver must check for: *
1 point
52. To test the tractor protection valve, the driver must check for air exhausting from the: *
1 point
53. When testing air pressure build-up time, pressure must build from 587 to 690 kPa (85 to 100 psi) within: *
1 point
54. When an air brake system is defective, you must: *
1 point
55. The brake pedal in an air brake system is used to: *
1 point
56. Manually operated front-wheel limiting valves are: *
1 point
57. Air brake chamber pushrod stroke is the result of: *
1 point
58. Each air chamber style, type and size has a specific: *
1 point
 59. Spring brake chambers: *
1 point
60. The part inside a spring brake chamber that can be hazardous is the: *
1 point
61. When a spring brake chamber has been disabled by a "caging bolt" or other mechanism: *
1 point
62. A spring brake control valve is normally: *
1 point
63. Anti-lock braking systems (ABS) *
1 point
64. Anti-lock braking systems (ABS) use warning indicator lights to indicate: *
1 point
65. When inspecting the foundation brake components, the driver must look for: *
1 point
66. The air loss rate on a single vehicle (bus, tractor or truck) must not exceed: *
1 point
 67. A properly functioning air brake system: *
1 point
68. Air compressor cut-in pressure must never be less than: *
1 point
69. When inspecting the air compressor, the driver must look for: *
1 point
70. When air brake system pressure drops below 414 kPa (60 psi) the spring brakes: *
1 point
71. When a vehicle's service brakes fail to apply, emergency brakes can be applied by using the: *
1 point
72. When a vehicle's brakes are out of adjustment: *
1 point
73. The air brake system on a trailer includes: *
1 point
 74. When trailer couplers or "gladhands" are cross-connected: *
1 point
75. The trailer hand valve is used to: *
1 point
76. A vehicle's brakes must do more work when: *
1 point
77. When the air loss from an air brake system exceeds the prescribed limits *
1 point
78. The air loss rate on a towing vehicle with two or more trailers must not exceed: *
1 point
79. To test the low air warning device, the ignition switch must be turned on and air pressure must be: *
1 point
80. The ability of the brakes to stop a vehicle: *
1 point
81. A trailer supply valve is: *
1 point
82. A tractor protection valve: *
1 point
83. A trailer with "spring brake" priority allows the trailer spring brakes to release before *
1 point
84. When the air pressure in the trailer supply line drops below 414 kPa (60 psi): *
1 point
85. To test the spring brakes, the driver should apply them and attempt to move the vehicle by: *
1 point
86. A compressor cut-out pressure must be between: *
1 point
87. Brake fade can result from: *
1 point
88. A tractor protection valve is defective if the trailer supply valve is closed (pulled out) and air exhausts from the: *
1 point
89. Trailer spring brakes must apply automatically when the: *
1 point
90. Trailer couplers or "gladhands" are used to connect the: *
1 point
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