Do You Know How To Use Air Break?

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Do You Know How To Use Air Break?

In the quiz below we, look and want to ascertain that you know how to use the air breaks. Despite of the answers you are going to give and the results, it is certain that you are going to learn.


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Questions and Answers
  • 1. 
    When inspecting visible air brake hoes and tubes, the driver must check for:
    • A. 

      Audible air leak

    • B. 

      Damaged or worn air line

    • C. 

      Improper fitting used to connect or repair an air line

    • D. 

      All of the above

  • 2. 
    • A. 

      Trailer service and spring brakes will function correctly

    • B. 

      The trailer spring brakes will release and function correctly

    • C. 

      Trailer service and spring brakes will not function correctly

    • D. 

      Trailer service brakes will function correctly

  • 3. 
    • A. 

      690 and 828 kPa ( 100 and 120 psi )

    • B. 

      621 and 690 kPa ( 90 and 100 psi )

    • C. 

      690 and 932 kPa (100 and 135 psi )

    • D. 

      414 and 828 kPa ( 60 and 120 psi )

  • 4. 
    When inspecting the air tanks, the driver must look for?
    • A. 

      Loose air compressor governor

    • B. 

      Improperly spliced air line

    • C. 

      Insecurely mounted air tank

    • D. 

      None of the above

  • 5. 
    When inspecting the, the driver must look for?
    • A. 

      Loose belt

    • B. 

      Cut belt

    • C. 

      Frayed belt

    • D. 

      All ot the above

  • 6. 
    When , the driver must look for?
    • A. 

      Insecure mounting bracket or fasteners

    • B. 

      Improper governor setting

    • C. 

      Loose air tank brackets or fasteners

    • D. 

      All of the above

  • 7. 
    When , air pressure must be between?
    • A. 

      690 and 828 kPa (100 and 120 psi)

    • B. 

      621 and 690 kPa (90 and 100 psi)

    • C. 

      690 and 932 kPa (100 and 135 psi)

    • D. 

      414 and 828 kPa (60 and 120 psi)

  • 8. 
    When measuring the applied push rod stroke on brakes having push rods, air pressure must be between?
    • A. 

      690 and 828 kPa (100 and 120 psi)

    • B. 

      621 and 690 kPa (90 and 100 psi)

    • C. 

      690 and 932 kPa (100 and 135 psi)

    • D. 

      414 and 828 kPa (60 and 120 psi)

  • 9. 
    When testing air pressure build-up time, pressure must build from 587 to 690 kPa ( 85 to 100 psi ) within?
    • A. 

      1 Minute

    • B. 

      3 Minutes

    • C. 

      2 Minutes

    • D. 

      4 Minutes

  • 10. 
    When inspecting visible air brake hoses and tubes, the driver check for?
    • A. 

      Audile air leak

    • B. 

      Damaged or worn air line

    • C. 

      Improper fitting used to connect or repair an air line

    • D. 

      All of the above

  • 11. 
    When inspecting the foundation brake components, the driver must look for
    • A. 

      Brake lining that is not against the drum when brakes are applied

    • B. 

      Brake lining that is too thin or cracked

    • C. 

      Grease or oil on the brake lining

    • D. 

      All of the above

  • 12. 
    When inspecting the air tanks, the driver must look for?
    • A. 

      Loose air compressor governor

    • B. 

      Improperly spliced air line

    • C. 

      Insecurely mounted air tank

    • D. 

      None of the above

  • 13. 
    When inspecting ,  the driver must look for?
    • A. 

      Brake calipers or rotors that are not the same colour

    • B. 

      Broken or cracked brake drums or rotors

    • C. 

      Brake drums or shoes that are not the correct size

    • D. 

      Square ports and markings

  • 14. 
    When inspecting the , the driver must look for?
    • A. 

      Air leaks, cracks and manufactured holes

    • B. 

      Manufactured air leaks and cracks

    • C. 

      Contaminated brake lining

    • D. 

      Air leaks, cracks and non-manufactured holes

  • 15. 
    When measuring the applied push rod stroke on brake having exposed push rods, air pressure must be between?
    • A. 

      690 and 828 kPa (100 and 120 psi)

    • B. 

      621 and 690 kPa (90 and 100 psi)

    • C. 

      690 and 932 kPa (100 and 135 psi)

    • D. 

      414 and 828 kPa (60 and 120 psi)

  • 16. 
    When inspecting the brake chambers on each side of a steering axle, the driver must ensure that slack adjusters are?
    • A. 

      The same effective length and brake chambers are the same size

    • B. 

      The same effective length and brake chambers are not the same size

    • C. 

      Not the same effective length and brake chambers are the same size

    • D. 

      Not the same size and brake chambers are not the same effective length

  • 17. 
    When inspecting the air compressor drive belt, the driver must look for?
    • A. 

      Loose belt

    • B. 

      Cut belt

    • C. 

      Frayed belt

    • D. 

      All of the above

  • 18. 
    When conducting an inspection of the air brake system, the vehicle should be parked securely on a?
    • A. 

      Hill with the wheels turned toward the curd

    • B. 

      Level surface and in any location

    • C. 

      Hill with the wheels turned away from the curb

    • D. 

      Level surface and in a safe location

  • 19. 
    When brake chamber push rod stoke exceeds the adjustment limit?
    • A. 

      The spring brakes will still work normally

    • B. 

      Vehicle stopping distances became shorter

    • C. 

      Vehicle braking capacity will increase

    • D. 

      Braking ability is reduced

  • 20. 
    When an air brake system is defective you must?
    • A. 

      Drive the vehicle slowly on the highway

    • B. 

      Drive the vehicle to the nearest service station

    • C. 

      Drive the vehicle back to the terminal

    • D. 

      Not drive or operate the vehicle on any road or highway

  • 21. 
    When an air brake system is defective you must?
    • A. 

      Drive the vehicle slowly on the highway

    • B. 

      Drive the vehicle to the nearest service station

    • C. 

      Drive the vehicle back to the terminal

    • D. 

      Not drive or operate the vehicle on any road or highway

  • 22. 
    When an air brake system is defective you must?
    • A. 

      Drive the vehicle slowly on the highway

    • B. 

      Drive the vehicle to the nearest service station

    • C. 

      Drive the vehicle back to the terminal

    • D. 

      Not drive or operate the vehicle on any road or highway

  • 23. 
    When an air brake system is defective you must?
    • A. 

      Drive the vehicle slowly on the highway

    • B. 

      Drive the vehicle to the nearest service station

    • C. 

      Drive the vehicle back to the terminal

    • D. 

      Not drive or operate the vehicle on any road or highway

  • 24. 
    When an air brake brake system is defective you must?
    • A. 

      Drive the vehicle slowly on the highway

    • B. 

      Drive the vehicle to the nearest service station

    • C. 

      Drive the vehicle back to the terminal

    • D. 

      Not drive or operate the vehicle on any road or highway

  • 25. 
    When air loss from an air brake system exceeds the prescribed limits?
    • A. 

      The vehicle must be driven slowly on the highway

    • B. 

      The vehicle may not be driven on any road or highway

    • C. 

      The vehicle must be driven to the nearest service centre

    • D. 

      The vehicle must be driven only on secondary roads

  • 26. 
    When air brakes are applied or released, the brakes will respond?
    • A. 

      After a split-second delay

    • B. 

      Directly and immediately

    • C. 

      Slower at slow speed

    • D. 

      Faster at high speed

  • 27. 
    When air brake system pressure drops below 414 kPa (60 psi), the spring brakes?
    • A. 

      Will automatically release

    • B. 

      Will automatically apply

    • C. 

      Must be manully applies

    • D. 

      Must be manually released

  • 28. 
    When a vehicle's service brakes fail to apply, emergency brakes can be applied by using the?
    • A. 

      Brake pedal

    • B. 

      Spring brake control valve

    • C. 

      Tractor protection valve

    • D. 

      Trailer hand valve

  • 29. 
    When a vehicle's brakes do not comply with the Ontario Highway Traffic Act and regulations?
    • A. 

      Only the driver may be charged

    • B. 

      Only the vehicle operator may be charged

    • C. 

      The driver will not be charged

    • D. 

      Both the vehicle operator and the driver may be charged

  • 30. 
    When a vehicle's brakes do not comply with the Ontario Highway Traffic Act and regulations?
    • A. 

      Only the driver may be charged

    • B. 

      Only the vehicle operator may be charged

    • C. 

      The driver will not be charged

    • D. 

      Both the vehicle operator and the driver may be charged

  • 31. 
    When a vehicle's brakes are out of adjustment?
    • A. 

      The spring brakes are not affected

    • B. 

      The spring brakes may not stop or hold a vehicle

    • C. 

      The spring brakes will hold the vehicle stationary

    • D. 

      Service brake performance is not affected

  • 32. 
    When a spring brake chamber has been disabled by a 'caging bolt' or other mechanism?
    • A. 

      It looks the same to a driver

    • B. 

      The spring brake will still apply

    • C. 

      The service brake will not apply

    • D. 

      The spring brake will not apply

  • 33. 
    When a low air pressure warning device activates, the driver must?
    • A. 

      Drive the vehicle until brakes come on automaticlly

    • B. 

      Come to a safe stop as soon as possible

    • C. 

      Replace the warning device

    • D. 

      Drain the moisture out the supply (wet) tank

  • 34. 
    When a driver finds a brake that is out of adjustment?
    • A. 

      The vehicle must not be driven or operated on any road or highway

    • B. 

      It must be corrected before entering an inspection station

    • C. 

      It must be corrected at the next annual inspection

    • D. 

      It must be corrected the next time the vehicle is serviced

  • 35. 
    Wedge brake components include?
    • A. 

      Brake drums and brake shoes

    • B. 

      Camshaft and brake calipers

    • C. 

      Rotors and brake drums

    • D. 

      Calipers and rotors

  • 36. 
    Vehicles with air brakes must have air pressure gauges that indicate the pressure in the?
    • A. 

      Brake chambers

    • B. 

      Air compressor

    • C. 

      Air compressor grovernor

    • D. 

      Primary and secondary air tanks

  • 37. 
    Using anti-lock braking systems (ABS) to prevent the wheels from locking?
    • A. 

      Causes the brakes to go out of adjustment more easily

    • B. 

      Helps maintain steering control during emergency braking

    • C. 

      Causes poor steering and directional stability in all driving situations

    • D. 

      Can cause loss of steering control

  • 38. 
    • A. 

      Towing vehicle supply line to the trailer service line

    • B. 

      Towing vehicle air brake system to the trailer air brake system

    • C. 

      Towing vehicle service line to the trailer supply line

    • D. 

      Lights on the trailer to the towing vehicle

  • 39. 
    Trailer spring brakes must apply automatically when the?
    • A. 

      Trailer supply valve is opened ( pushed in )

    • B. 

      Spring brake valve is opened ( pushed in )

    • C. 

      Trailer supply valve is closed ( pulled out )

    • D. 

      Trailer hand valve is released

  • 40. 
    To check the air pressure in a vehicle's air brake system, a driver?
    • A. 

      Reads the gauges on the instrument panel

    • B. 

      Makes a full brake application

    • C. 

      Operates the engine at fast idle

    • D. 

      Waits for governor cut-out

  • 41. 
    The type of air brake components on most large commerical vehicles are either?
    • A. 

      Drum or hydraulic brakes

    • B. 

      Air or disc brakes

    • C. 

      Wet or dry brakes

    • D. 

      Drum or disc brakes

  • 42. 
    To test the low air warning device, the ignition switch must be turned on and air pressure must be?
    • A. 

      Raised from the normal operating range until the deive activates

    • B. 

      Raised from zero until the device de-actvates

    • C. 

      Reduced from the normal operating range until the device activates

    • D. 

      Reduced from 414 kPa ( 60 psi )

  • 43. 
    Trailer couplers or 'gladhands' are usually?
    • A. 

      Painted the same colour as the vehicle

    • B. 

      Cross-connected when colours are matched

    • C. 

      Yellow and black to avoid cross-connection

    • D. 

      Colour matched and designed to prevent cross-connection

  • 44. 
    To test air pressure build-up time, the engine must be running at?
    • A. 

      400 to 500 rpm

    • B. 

      600 to 900 rpm

    • C. 

      2000 to 2100 rpm

    • D. 

      1000 to 1500 rpm

  • 45. 
    To prevent vehicle movement during an inspection of the air brake system, a driver should use?
    • A. 

      The service brakes

    • B. 

      The spring brakes

    • C. 

      Wheel chocks or blocks

    • D. 

      The brake pedal

  • 46. 
    To test the low air warning device, the ignition switch must be turned on and air pressure must be?
    • A. 

      Raised from the normal operating range until the device activites

    • B. 

      Raised from zero until the device de-activites

    • C. 

      Reduced from the normal operating until the device activites

    • D. 

      Reduced from 414kPa(60 psi) until the device de-activies

  • 47. 
    To test the , the driver must check for air exhausting from the?
    • A. 

      Trailer supply line with the trailer air supply valve open ( pushed in)

    • B. 

      Trailer supply line with trailer air supply valve closed ( pulled out )

    • C. 

      Trailer service line with the trailer supply valve closed ( pulled out )

    • D. 

      Trailer service line with the trailer supply valve open ( pushed in )

  • 48. 
    The trailer hand valve is used to?
    • A. 

      Release the trailer spring brakes

    • B. 

      Apply the trailer spring brakes

    • C. 

      Release the towing vehicle spring brakes

    • D. 

      Apply the trailer service brakes

  • 49. 
    The part inside a spring brake chamber that can be hazardous is the?
    • A. 

      Rubber diaphragm

    • B. 

      Return spring

    • C. 

      Large coil spring

    • D. 

      Release push rod

  • 50. 
    The normal operating pressure range for air brake systems is?
    • A. 

      414 to 828 kPa (60 to 120 psi)

    • B. 

      0 to 1035 kPa (0 to 150 psi)

    • C. 

      828 to 932 kPa (120 to 135 psi)

    • D. 

      552 to 932 kPa (80 to 135 psi)

  • 51. 
    The low air warning device must activate before air pressure drops to?
    • A. 

      621 kPa (90 psi)

    • B. 

      518 kPa (75 psi)

    • C. 

      380 kPa (55 psi)

    • D. 

      311 kPa (45 psi)

  • 52. 
    The compressed air in an air brake system is stored in?
    • A. 

      The vehicle's air tanks

    • B. 

      The air compressor governor

    • C. 

      The brake chambers

    • D. 

      Belts and chains

  • 53. 
    The brake systems on  most large commerical vehicles use?
    • A. 

      Compressed air to apply the brakes

    • B. 

      Steam to apply the brakes

    • C. 

      Water to apply the brakes

    • D. 

      Brake fluid to apply the brakes

  • 54. 
    The brake pedal in an air brake system is used to?
    • A. 

      Apply vehicle spring brakes

    • B. 

      Raise and lower air brake system pressure

    • C. 

      Apply vehicle service brakes

    • D. 

      Apply trailer service brakes only

  • 55. 
    The air that exhausts from an air brake system can carry?
    • A. 

      Dirt and dust

    • B. 

      Moisture

    • C. 

      Oil

    • D. 

      All of the above

  • 56. 
    The air loss rate on a single vehicle (bus, tractor or truck) must not exceed?
    • A. 

      21 kPa (3 psi) per minute

    • B. 

      41 kPa (6 psi) per minute

    • C. 

      55 kPa (8 psi) per minute

    • D. 

      7 kPa (1 psi) per minute

  • 57. 
    The air loss rate on a towing vehicle with two or more trailers must not exceed?
    • A. 

      28 kPa ( 4 psi ) per minute

    • B. 

      41 kPa ( 6 psi ) per minute

    • C. 

      55 kPa ( 8 psi ) per minute

    • D. 

      7 kPa (1 psi ) per minute

  • 58. 
    The air brake system on a trailer includes?
    • A. 

      Air tanks and air compressors

    • B. 

      Air tanks and automatic evaporator valves

    • C. 

      Wet and dry air tanks

    • D. 

      Air tanks and automatic spring brake application

  • 59. 
    The air loss rate on a towing vehicle with two or more trailers must not exceed?
    • A. 

      28 kPa (4 psi) per minute

    • B. 

      41 kPa (6 psi) per minute

    • C. 

      55 kPa (8 psi) per minute

    • D. 

      7 kPa (1 psi) per minute

  • 60. 
    Safety valves prevent?
    • A. 

      Overheating of the air tanks

    • B. 

      Draining of the air tanks

    • C. 

      Overpressure of the air brake system

    • D. 

      Loss of air tanks

  • 61. 
    The air loss rate on a single vehicle (Bus, Tractor or Truck) must not exceed?
    • A. 

      21 kPa (3 psi ) per minute

    • B. 

      41 kPa (6 psi ) per minute

    • C. 

      55 kPa (8 psi ) per minute

    • D. 

      7 kPa ( 1 psi ) per minute

  • 62. 
    Spring brake chambers?
    • A. 

      Are larger than service brake chambers

    • B. 

      Are smaller than service brake chambers

    • C. 

      Always have square ports

    • D. 

      Are less likely to be out of adjustment than service brake chambers

  • 63. 
    Repair and re-adjustment of all types of air brakes may be performed by?
    • A. 

      Licensed drivers

    • B. 

      Certified drivers

    • C. 

      Certified technician

    • D. 

      Drivers with a valid air brake endorsement

  • 64. 
    Each , type and size has a specific?
    • A. 

      Colour

    • B. 

      Adjustment limit

    • C. 

      Mounting position

    • D. 

      All of the above

  • 65. 
    Are?
    • A. 

      Used to reduce the force of the service brakes on the front steering axle

    • B. 

      Only found on new vehicles to disable steering brakes

    • C. 

      Used to limit the number of times that brakes can be applied

    • D. 

      Used to reduce the brake force on trailer axle brakes

  • 66. 
    High brakes temperature can result from?
    • A. 

      Repeated brake use driving down along or steep hill

    • B. 

      Repeated braked use in stop and go traffic

    • C. 

      Severe braking

    • D. 

      All of the above

  • 67. 
    Brakes convert the energy of a moving vehicle into?
    • A. 

      Water

    • B. 

      Compressed air

    • C. 

      Heat

    • D. 

      Noise

  • 68. 
    Repair and re-adjustment of all types air brakes may be performed by?
    • A. 

      Licensed drivers

    • B. 

      Certified drivers

    • C. 

      Certified technicians

    • D. 

      Drivers wwith a valid air brake endorsement

  • 69. 
    Driving a vehicle with an air brake system that is outside the normal operating pressure range is?
    • A. 

      Safe only for a short period of time

    • B. 

      Not safe at any time

    • C. 

      Safe only at high speed

    • D. 

      Unsafe only when going down hill

  • 70. 
    Hydraulic systems use brake?
    • A. 

      A. Steam

    • B. 

      B. Compressed air

    • C. 

      C. Water

    • D. 

      D. Brake fluid

  • 71. 
    Drivers must be careful  when conducting  an inspection of the air brake system to avoid?
    • A. 

      Unexpected vehicle movement

    • B. 

      Compressed air exhausting from components

    • C. 

      Moving vehicle parts

    • D. 

      All of the above

  • 72. 
    Drivers must be careful when conducting an inspection of the air brake system to avoid?
    • A. 

      Unexpected vehicle movement

    • B. 

      Compressed air exhausting from components

    • C. 

      Moving vehicle parts

    • D. 

      All of the above

  • 73. 
    Brake fade can result from?
    • A. 

      High brake temperatures

    • B. 

      High air compressor temperature

    • C. 

      High air brake system pressure

    • D. 

      Driving at high altitudes

  • 74. 
    • A. 

      Prevent wheel lock and may reduce steering control

    • B. 

      Cause wheel lock but may not shorten vehicle stopping distance

    • C. 

      Prevent wheel lock but may not shorten vehicle stopping distance

    • D. 

      Cause wheel lock to shorten vehicle stopping distance

  • 75. 
    An air dryer removes moisture, which is excelled when the?
    • A. 

      Low air warning device activates

    • B. 

      Driver applies the service brakes

    • C. 

      Compressor reaches cut-out pressure

    • D. 

      Spring brakes are applied

  • 76. 
    An air compressor governor should cut-in approximately 138 to 173 kPa (20 to 25 psi)?
    • A. 

      Below cut-out pressure setting

    • B. 

      Above cut-in pressure setting

    • C. 

      Above cut-out pressure setting

    • D. 

      Below cut-in pressure setting

  • 77. 
    Anti-lock braking systems (ABS) use warning indicator lights to indicate?
    • A. 

      The system temperature

    • B. 

      Malfunctions of the system

    • C. 

      Wheel skidding

    • D. 

      None of the above

  • 78. 
    Air compressors are powered directly by the engine or by using?
    • A. 

      Belts and pulleys

    • B. 

      Brackets and supports

    • C. 

      Chains and sprockets

    • D. 

      Belts and Chains

  • 79. 
    Alcohol evaporators may be used to?
    • A. 

      Add water to the air brake system to prevent freezing

    • B. 

      Heat the air brake system to help prevent freezing

    • C. 

      Helps prevent moisture in the air brake system from freezing

    • D. 

      Remove water vapor from the air brake system

  • 80. 
    Air tanks must be drained regularly because?
    • A. 

      This is where moisture and oil collect

    • B. 

      Tanks will develop too much pressure

    • C. 

      Tanks will overheat

    • D. 

      This is where primary and secondary air collect

  • 81. 
    Air compressors?
    • A. 

      Are filled with brake fluid

    • B. 

      Generate heat to stop a vehicle

    • C. 

      Force air into a smaller space

    • D. 

      All of the above

  • 82. 
    Air brake systems must comply with the Ontario Highway Traffic Act and regulations?
    • A. 

      Only when vehicle is being tested

    • B. 

      Only during an annual safety inspection

    • C. 

      Only when they are inspected by enforcement personnel

    • D. 

      At all times when being driven or operated on any road or highway

  • 83. 
    Air compressor cut-in pressure must never be less than?
    • A. 

      414 kPa ( 60 psi )

    • B. 

      828 kPa ( 120 psi )

    • C. 

      552 kPa ( 80 psi )

    • D. 

      932 k Pa ( 135 psi )

  • 84. 
    A vehicle's brakes must do more work when?
    • A. 

      The vehicle carries less weight

    • B. 

      The vehicle goes slower

    • C. 

      The vehicle carries more weight

    • D. 

      All of the above

  • 85. 
    A vehicle's brakes must do more work when?
    • A. 

      The vehicle goes slower

    • B. 

      The vehicle goes faster

    • C. 

      The vehicle carries less weight

    • D. 

      None of the above

  • 86. 
    A tractor protection valve is defective if the trailer supply valve is closed ( pulled out ) and air exhausts from the?
    • A. 

      Trailer service line with the brake pedal pressed

    • B. 

      Trailer supply line with the brake pedal pressed

    • C. 

      Trailer service line with the brake pedal released

    • D. 

      Trailer supply line with the brake pedal released

  • 87. 
    A tractor protection valve is defective if the trailer supply valve is closed ( pulled out ) and air exhausts from the?
    • A. 

      Trailer service line with the brake pedal pressed

    • B. 

      Trailer supply line with the brake pedal pressed

    • C. 

      Trailer service line with the brake pedal released

    • D. 

      Trailer supply line with the brake pedal released

  • 88. 
    A tractor protection valve is defective if the trailer supply valve is closed ( pulled out ) and air exhausts from the?
    • A. 

      Trailer service line with the brake pedal pressed

    • B. 

      Trailer supply line with the brake pedal pressed

    • C. 

      Trailer service line with the brake pedal released

    • D. 

      Trailer supply line with the brake pedal released

  • 89. 
    A tractor protection valve is defective if the trailer supply valve is closed ( pulled out ) and air exhausts from the?
    • A. 

      Trailer service line with the brake pedal pressed

    • B. 

      Trailer supply line with the brake pedal pressed

    • C. 

      Trailer service line with the brake pedal released

    • D. 

      Trailer supply line with the brake pedal released

  • 90. 
    Air compressor cut-in pressure must never be less than?
    • A. 

      414 kPa (60 psi)

    • B. 

      828 kPa (120 psi)

    • C. 

      552 kPa (80 psi)

    • D. 

      932 kPa (135 psi)

  • 91. 
    Air compressor cut-in pressure must never be less than?
    • A. 

      414 kPa (60 psi)

    • B. 

      828 kPa (120 psi)

    • C. 

      552 kPa (80 psi)

    • D. 

      932 kPa (135 psi)

  • 92. 
    A vehicle's brakes must do more work when?
    • A. 

      The vehicle goes slower

    • B. 

      The vehicle goes faster

    • C. 

      The vehicle carries less weight

    • D. 

      None of the above

  • 93. 
    Air brake chamber push rod stroke is the result of?
    • A. 

      Moisture entering the air tanks

    • B. 

      Compressed air entering the air tanks

    • C. 

      Compressed air entering the brake chamber

    • D. 

      Brakes that are out of adjustment

  • 94. 
    A brake having an exposed push rod is out of adjustment when?
    • A. 

      The push rod stroke exceeds the adjustment limt of the brake chamber

    • B. 

      The angle between the slack adjuster and push rod is less than 90 degrees

    • C. 

      The angle between the slack adjuster and push rod is more than 90 degrees

    • D. 

      Air pressure drops more that 55 kPa ( 8 psi ) when are applied

  • 95. 
    A trailer supply valve is usually?
    • A. 

      Located in the same position in all commerical vehicles

    • B. 

      Pulled to release spring brakes and pushed to apply service brakes

    • C. 

      A toggle-type valve that supplies air to the trailer and is located in the same psoition on all vehicles

    • D. 

      A push/pull type valve located near the driver that supplies air to the trailer

  • 96. 
    A trailer with spring brake priorty allows the trailer spring brakes to release before?
    • A. 

      Towing vehicle service brakes will operate

    • B. 

      Trailer service brakes will operate

    • C. 

      Trailer spring brakes will release

    • D. 

      Trailer service brakes will release

  • 97. 
    Air brake systems must comply with the Ontario Highway Traffic Act and regulations?
    • A. 

      Only when the vehicle is being tested

    • B. 

      Only during an annual safety inspection

    • C. 

      Only when they are inspected by enforcement personnel

    • D. 

      At all times when being driven or operated on any road or highway

  • 98. 
    A tractor protection valve?
    • A. 

      Causes towing vehicle spring brakes to apply in an emergency

    • B. 

      Prevents loss of air out the towing vehicle

    • C. 

      Causes the trailer service brakes to apply in an emergency

    • D. 

      Prevents air loss form the trailer supply line

  • 99. 
    A reliable method for inspecting brake adjustment on a brake having  an exposed push rod is?
    • A. 

      Measuring the applied push rod stroke

    • B. 

      Checking air pressure drop on brake application

    • C. 

      Cheacking for a 90-degree angle when brakes are applied

    • D. 

      Rolling the vehicle forward and applying the brakes

  • 100. 
    A reliable method for inspecting brake adjustment on a brake having an exposed push rod is?
    • A. 

      Measuring the applied push rod stroke

    • B. 

      Checking air pressure drop on brake application

    • C. 

      Checking for a 90-degree angle when brakes are applied

    • D. 

      Rolling the vehicle forward and applying the brakes

  • 101. 
    A brake having an exposed push rod is out of adjustment when?
    • A. 

      The push rod stoke exceeds the adjustment limit of the brake chamber

    • B. 

      The angle between the slack adjuster and push rod is less than 90 degrees

    • C. 

      The angle between the slack adjuster and push rod is more than 90 degrees

    • D. 

      Air pressure drops more than 55 kPa (8 psi when brakes are applied

  • 102. 
    A reliable method for inspecting brake adjustment on a brake having an exposed push rod is?
    • A. 

      Measuring the applied push rod stroke

    • B. 

      Checking air pressure drop on brake application

    • C. 

      Checking for a 90 degree angle when brakes are applied

    • D. 

      Rolling the vehicle forward and applying the brakes

  • 103. 
    A reliable method for inspecting brake adjustment on a brake having an exposed push rod is?
    • A. 

      Measuring the applied push rod stroke

    • B. 

      Checking air pressure drop on brake application

    • C. 

      Checking for a 90-degree angle when brakes are applied

    • D. 

      Rolling the vehicle forward and applying the brakes

  • 104. 
    A spring brake control valve is normally?
    • A. 

      Located in the same position in all commerical vehicles

    • B. 

      Pulled to release and pushed to apply the service brake

    • C. 

      A toggle-type valve located in the same position in all vehicles

    • D. 

      A push/pull type valve located near the driver

  • 105. 
    A reliable method for inspecting brake adjustment on a brake having an exposed push rod is?
    • A. 

      Measuring the applied push rod stroke

    • B. 

      Checking air pressure drop on brake application

    • C. 

      Checking for a 90-degree angle when brakes are applied

    • D. 

      Rolling the vehicle forward and applying the brakes

  • 106. 
    A governor controls air compressor?
    • A. 

      Temperature

    • B. 

      Speed and pressure

    • C. 

      Cut-in and Cut-out pressures

    • D. 

      Temperature and speed

  • 107. 
    A properly functioning air brake system?
    • A. 

      Will lose air at a noticeable rate

    • B. 

      Has many noticeable air leaks

    • C. 

      Will lose air at a noticeable rate when the engine is not running

    • D. 

      Should not have any noticable air leaks

  • 108. 
    When a trailer's service brakes fail to apply, the trailer spring brakes an be applied by using the?
    • A. 

      Tractor protection valve

    • B. 

      Trailer hand valve

    • C. 

      Tralier supply valve

    • D. 

      Brake pedal

  • 109. 
    The ability of the brakes to stop a vehicle
    • A. 

      Is the same for all vehicle weights

    • B. 

      May be lost when a vehicle is overloaded

    • C. 

      Improves as speed increases

    • D. 

      All of the above

  • 110. 
    The low air warning device must activate before air pressure drops to?
    • A. 

      621 kPa ( 90 psi )

    • B. 

      518 kPa ( 75 psi )

    • C. 

      380 kPa ( 55 psi )

    • D. 

      311 kPa ( 45 psi )

  • 111. 
    The low air warning device must activate before air pressure drops to?
    • A. 

      621 kPa ( 90 psi )

    • B. 

      518 kPa ( 75 psi )

    • C. 

      380 kPa ( 55 psi )

    • D. 

      311 kPa ( 45 psi )

  • 112. 
    The air loss rate on a single vehicle ( bus, tractor or truck ) must not exceed?
    • A. 

      21 kPa ( 3 psi ) per minute

    • B. 

      41 kPa ( 6 psi ) per minute

    • C. 

      55 kPa ( 8 psi ) per minute

    • D. 

      7 kPa ( 1 psi ) per minute

  • 113. 
    If a vehicle moves while the spring brakes are applied, the vehicle has?
    • A. 

      Defective spring brakes

    • B. 

      Properly adjusted service brakes

    • C. 

      A defective brake pedal

    • D. 

      Properly adjusted spring brakes

  • 114. 
    The brake pedal in an air brake system is used to?
    • A. 

      Apply vehicle spring brakes

    • B. 

      Raise and lower air brake system pressure

    • C. 

      Apply vehicle service brakes

    • D. 

      Apply trailer service brakes only

  • 115. 
    'S' cam brake components include?
    • A. 

      Rotors and Brake drums

    • B. 

      Camshafts and brake calipers

    • C. 

      Camshafts and brake shoes

    • D. 

      Calipers and rotors

  • 116. 
    The air loss rate on a towing vehicle with two or more trailers must not exceed?
    • A. 

      28 kPa ( 4 psi ) per minute

    • B. 

      41 kPa ( 6 psi ) per minute

    • C. 

      55 kPa ( 8 psi ) per minute

    • D. 

      7 kPa ( 1 psi ) per minute

  • 117. 
    While draining a vehicle's air tanks, the driver must watch the?
    • A. 

      Trailer supply line for air exhausting

    • B. 

      Discharge of air from the trailer service line

    • C. 

      Discharge from the air tank for abnormalities

    • D. 

      Function of the governor cut-out

  • 118. 
    Disc brake components include?
    • A. 

      Rotors and Brake drums

    • B. 

      Camshafts and Brake Calipers

    • C. 

      Camshafts and Brake shoes

    • D. 

      Calipers and Rotors

  • 119. 
    Disc brake components include?
    • A. 

      Rotors and Brake drums

    • B. 

      Camshafts and Brake Calipers

    • C. 

      Camshafts and Brake shoes

    • D. 

      Calipers and Rotors

  • 120. 
    Disc brake components include?
    • A. 

      Rotors and Brake drums

    • B. 

      Camshafts and Brake Calipers

    • C. 

      Camshafts and Brake shoes

    • D. 

      Calipers and Rotors

  • 121. 
    Wedge brake components include?
    • A. 

      Brake drums and brake shoes

    • B. 

      Camshafts and brake calipers

    • C. 

      Camshafts and brake shoes

    • D. 

      Calipers and rotors

  • 122. 
    An air tank drain valve that fails to function?
    • A. 

      Is a normal condition of the air brake system

    • B. 

      Is a defect of the air brake system

    • C. 

      Indicates a defective air compressor governor

    • D. 

      Indicates a defective brake pedal

  • 123. 
    An air tank drain valve that fails to function?
    • A. 

      Is a normal condition of the air brake system

    • B. 

      Is a defect of the air brake system

    • C. 

      Indicates a defective air compressor governor

    • D. 

      Indicates a defective brake pedal

  • 124. 
    Air pressure is usually measured in
  • 125. 
    The normal range of air pressure in an air brake system is between
  • 126. 
    The normal range of air pressure in an air brake system is between
  • 127. 
    The normal range of air pressure in an air brake system is between
  • 128. 
    The normal range of air pressure in an air brake system is between
  • 129. 
    The points where the air compressor is turned on and off determine the normal operating pressure range of an air brake system. Cut-Out and Cut-In pressure is normally?
  • 130. 
    The points where the air compressor is turned on and off determine the normal operating pressure range of an air brake system. Cut-Out and Cut-In pressure is normally?
  • 131. 
    The points where the air compressor is turned on and off determine the normal operating pressure range of an air brake system. Cut-Out and Cut-In pressure is normally?
  • 132. 
    The points where the air compressor is turned on and off determine the normal operating pressure range of an air brake system. Cut-Out and Cut-In pressure is normally?
  • 133. 
    The points where the air compressor is turned on and off determine the normal operating pressure range of an air brake system. Cut-Out and Cut-In pressure is normally?
  • 134. 
    A vehicle should only be driven when air pressure is in the normal operating range. A drop in air pressure below the cut-in setting is a sign that the air brake system is malfunctioning?
    • A. 

      True

    • B. 

      False

  • 135. 
    The minimum and maximum pressure settings prescribed in the Ontario Highway Traffic Act and regulations are 552 kPa (80 psi) and 932 kPa (135 psi)?
    • A. 

      True

    • B. 

      False

  • 136. 
    What air tanks should be drained first when during air tank maintenance?
  • 137. 
    The vehicle passes the test when the cut-out pressure setting is between 690 and 932 kPa (100 and 135 psi) and the cut-in pressure setting is 552 kPa (80 psi) or higher?
    • A. 

      True

    • B. 

      False

  • 138. 
    The vehicle fails the test when the cut-out pressure setting is higher than 932 kPa (135 psi) or lower than 690 kPa (100 psi), or cut-in pressure setting is lower than 552 kPa (80 psi)?
    • A. 

      True

    • B. 

      False

  • 139. 
    Name the components of the?
    • A. 

      Spring Brake Clamp

    • B. 

      Diaphragm

    • C. 

      Push Rod

    • D. 

      Return Spring

    • E. 

      Yoke

    • F. 

      Clevis pin

    • G. 

      Spring Brake Clamp

    • H. 

      Large coil spring

    • I. 

      Spring Brake Diaphragm

    • J. 

      Return spring

    • K. 

      Service Brake Chamber

    • L. 

      Slack Adjuster

  • 140. 
     Side view and underside view of a conventional 18-wheeler semi-trailer truck with an enclosed cargo space. The underside view shows the arrangement of the 18 tires (wheels). Shown in blue in the underside view are the axles, drive shaft, and differentials. The legend for labeled parts of the truck is as follows: 1. tractor unit 2. semi-trailer (detachable) 3. engine compartment 4. cabin 5. sleeper (not present in all trucks) 6. air dam 7. fuel tanks 8. fifth wheel coupling 9. enclosed cargo space 10. landing gear - legs for when semi-trailer is detached 11. tandem axles  
    • A. 

      Tractor Unit

    • B. 

      Semi-trailer (detachable)

    • C. 

      Engine Compartment

    • D. 

      Cabin

    • E. 

      Sleeper (not present in all trucks)

    • F. 

      Air Dam

    • G. 

      Fuel Tanks

    • H. 

      Fifth wheel coupling

    • I. 

      Enclosed Cargo space

    • J. 

      Landing Gear- legs for when semitrailer is detached

    • K. 

      Tandem Axles