DZ Written Test Practice: 100 Ontario Class D Questions

All 100 questions in this test

Every question and its answer choices. The correct answers and explanations appear when you take the test above.

1. What must a Class D holder add to drive a truck fitted with air brakes?

   1. A T endorsement
   2. An R condition
   3. A Q condition
   4. A Z endorsement

2. Which route is usually most fuel efficient for a truck?

   1. A steep mountain shortcut
   2. A two-lane road through each village
   3. A flat highway bypassing towns
   4. The shortest route through downtown

3. With brakes held applied for one minute, what air drop is a major defect on a Class D truck?

   1. More than 1 psi
   2. More than 5 psi
   3. More than 8 psi
   4. More than 3 psi

4. Why do some loads need a protective bulkhead?

   1. To protect you if the load shifts
   2. To lower the truck's overall height
   3. To hide the cargo from other drivers
   4. To improve the truck's fuel economy

5. For each randomly selected item, what must you do besides demonstrating the check?

   1. Explain the defect and your action
   2. Photograph it for the examiner
   3. Repair it on the spot
   4. Sign a repair order for it

6. At a crossing with gates, when may you cross the tracks?

   1. Once lights stop and the gate rises
   2. As soon as the train has passed
   3. When the gate first starts to rise
   4. If you can fit around the gate

7. Where should you learn your truck's shift pattern?

   1. Other drivers' best guesses
   2. The maker's operating manual
   3. The annual inspection decal
   4. The CVOR certificate

8. Besides fixed stations, where else may trucks be inspected?

   1. Only at international border crossings
   2. At mobile inspection units
   3. Only at DriveTest centres
   4. Only inside the operator's garage

9. A yellow sign shows a truck entering from the left side. What does it warn of?

   1. Truck entrance on the left
   2. No trucks allowed on the left
   3. Truck stop ahead on the left
   4. All trucks must turn left

10. While straight backing, the rear drifts left. What should you do?

    1. Stop and walk away
    2. Keep going and finish fast
    3. Correct the alignment gently
    4. Turn the wheel hard right

11. How can brakes cause a truck fire?

    1. By being painted the wrong colour
    2. By overheating
    3. By using brand-new brake linings
    4. By being washed too often

12. You move to a new address. What does a replacement licence cost?

    1. Nothing
    2. $160
    3. $23.75
    4. $90

13. A driver uses a pick-up with a 5,500 kg MGVWR for personal errands. Do hours-of-service rules apply?

    1. Yes, always
    2. Only over 160 km
    3. No, it is exempt
    4. Only on weekends

14. Your cargo could explode in a fire. What extra step should you take?

    1. Spray foam on the cab roof
    2. Stop traffic, keep people back
    3. Drive on to the nearest town
    4. Open the cargo doors to vent it

15. Which licence class covers any regular bus and also allows Class D trucks?

    1. Class E
    2. Class C
    3. Class G
    4. Class F

16. A used truck's brand reads "None". What does that tell you?

    1. It was rebuilt after a crash
    2. It has never been damaged
    3. It is unsafe to drive
    4. No Ontario brand applied

17. A clearance light on your cube van is broken. What does the handbook say to do?

    1. Cover the lens with red tape
    2. Ignore it until the next rainstorm
    3. Park the truck out of service at once
    4. Report it for prompt repair

18. Which commercial vehicles must follow NSC Standard 10 on Ontario roads?

    1. Only vehicles crossing borders
    2. Every one carrying cargo
    3. Only trucks over 11,000 kg
    4. Only flatbeds

19. On a Class D road test you make errors on two daily inspection items. What is the result?

    1. You pass with a warning
    2. You redo one item
    3. You lose 2 of 30 points
    4. You do not pass

20. You approach a stopped school bus from the front with its red lights flashing. What must you do?

    1. Stop at a safe distance
    2. Pass slowly on the right
    3. Stop only on two-lane roads
    4. Continue if no children are visible

21. Which gauge should you check right after starting the engine?

    1. Trip odometer
    2. Fuel economy
    3. Outside temperature
    4. Oil pressure

22. You refuse to unload part of an overweight load when ordered. What fine range applies?

    1. $50 to $500
    2. $25,000 to $50,000
    3. $1,000 to $2,000
    4. $200 to $20,000

23. A yellow left arrow follows a green left arrow. What does it mean?

    1. Turn now before it goes red
    2. Pedestrians may now cross
    3. Go straight through only
    4. Don't start the turn

24. Before entering a two-lane roundabout, a large truck may need to do what?

    1. Use the shoulder
    2. Occupy both lanes
    3. Stop and reverse
    4. Sound its horn

25. During the air-loss test, what must you do with the spring (parking) brakes?

    1. Apply them
    2. Cage them
    3. Release them
    4. Leave the knob halfway

26. Your renewal form never arrived. Whose responsibility is it to keep a valid licence?

    1. Your employer's
    2. Yours
    3. Your insurer's
    4. The ministry's

27. A driver on the 14-day cycle has 118 on-duty hours in 14 days. How much more on-duty time may come before driving stops?

    1. 2 hours
    2. None
    3. 12 hours
    4. 22 hours

28. Which habit is listed as a common cause of truck fires?

    1. Checking the tire pressure
    2. Using cruise control on hills
    3. Tossing cigarettes out
    4. Washing the truck too often

29. What must an applicant for the RV-restricted Class D complete?

    1. The RV Learning Module
    2. A dangerous goods training course
    3. Mandatory entry-level training
    4. An air brake endorsement course

30. About how much fuel can a big truck engine burn idling at 900 rpm?

    1. Up to 10 litres an hour
    2. Up to 1 litre a day
    3. Almost none
    4. Up to 4 litres an hour

31. How is a leaking wheel seal classed?

    1. A minor defect
    2. A critical defect
    3. A major defect
    4. Not a defect

32. Which regulation under the Highway Traffic Act deals with security of loads?

    1. O. Reg. 555/06
    2. O. Reg. 512/97
    3. O. Reg. 363/04
    4. O. Reg. 199/07

33. Why downshift before entering an intersection rather than in it?

    1. Because shifting there is illegal
    2. To avoid lugging mid-crossing
    3. To keep the cab radio quiet
    4. To make the brake lights flash

34. Which vehicles are exempt from Ontario's speed-limiter rule?

    1. Dump trucks over 11,794 kg
    2. All trucks built before 2010
    3. Motor homes and fire apparatus
    4. Cube vans in cities

35. On some trucks, what may you need to do while releasing the clutch to move off?

    1. Add a little throttle
    2. Turn off the engine brake switch
    3. Press the service brake hard
    4. Shift back into neutral

36. What is the fee for an original CVOR certificate?

    1. $32
    2. $255
    3. $500
    4. $90

37. What must you do at a flashing red light?

    1. Stop only at night
    2. Slow down only
    3. Come to a complete stop
    4. Yield only to trucks

38. How does the radius of the rear wheels' path compare with the front wheels'?

    1. It changes with speed only
    2. It is the same
    3. It is longer
    4. It is shorter

39. Your truck has air disc brakes behind body panels. How is pushrod stroke checked on the road test?

    1. You remove the wheels to reach them
    2. You explain it verbally
    3. You skip all the brake items entirely
    4. The road test is cancelled on the spot

40. Which vehicles fall under the commercial zero-tolerance rule for alcohol and drugs?

    1. Any needing Class A to F
    2. Only dangerous goods trucks
    3. Only buses with passengers
    4. Only vehicles over 20,000 kg

41. Which item must appear on the daily log?

    1. The weather forecast for the day
    2. The price paid for each load
    3. The driver's home phone number
    4. Starting odometer reading

42. In a hard stop with ABS, the pedal pulses. What should you do?

    1. Release the pedal quickly
    2. Pump the pedal rapidly
    3. Keep pressing firmly
    4. Shift into neutral at once

43. Since July 1, 2025, what is the heaviest RV a full Class G licence alone covers?

    1. 14,000 kg
    2. 4,600 kg
    3. No limit
    4. 11,000 kg

44. What should you do with the retarder when you don't need it?

    1. Use it instead of the clutch
    2. Turn it off
    3. Leave it on always
    4. Use it to hold speed uphill

45. The hydraulic brake fluid is just below the minimum mark. How is it classed?

    1. A major defect
    2. A minor defect
    3. Not a defect
    4. A critical impound defect

46. Your truck is plated for 15,000 kg. The customer wants 17,000 kg loaded. What should you do?

    1. Load it if the axles can hold it
    2. Load it for short trips only
    3. Refuse to exceed its capacity
    4. Load it all and drive slowly

47. During the roadside stop, when do you take your foot off the service brake?

    1. Before stopping completely
    2. As soon as you stop moving
    3. After the parking brake is set
    4. Before shifting to neutral

48. You come to an intersection with no signs or lights. Who has the right-of-way?

    1. The vehicle on your right
    2. The heavier of the two vehicles
    3. The faster of the two vehicles
    4. The vehicle coming from your left

49. When is pumping (fanning) the brakes useful?

    1. On dry pavement
    2. When parked on a hill
    3. On long downgrades
    4. On slippery pavement

50. Which vehicle is NOT a motor vehicle under the handbook definition?

    1. A delivery truck
    2. A moped
    3. A farm tractor
    4. A motorcycle

51. A yellow sign advises trucks over 10 tonnes not to use a road. Is it a ban?

    1. Yes, a total ban
    2. Yes, with a $20,000 fine
    3. No, it is an advisory warning
    4. Yes, but only at night

52. If you must use part of another lane to make a sharp turn, whose job is it to do it safely?

    1. Yours, the driver's
    2. The police's
    3. No one's
    4. Other drivers' only

53. Air pressure drops toward 60 psi while you drive. What will the spring brakes do?

    1. Do nothing until 20 psi
    2. Release completely and stay off
    3. Begin to apply on their own
    4. Lock the steering wheel

54. Since July 1, 2018, what must a Class D driver under 65 pass to renew?

    1. A road test only
    2. A medical exam only
    3. Vision and knowledge tests
    4. Nothing; just pay the fee

55. Which of these trucks is exempt from hours-of-service rules?

    1. A 3-axle truck hauling farm produce
    2. A flatbed carrying steel
    3. A cube van delivering parcels
    4. A tandem dump truck on a road job

56. When may you leave a truck stopped on the roadway itself?

    1. For up to one hour at most
    2. Only on weekends and holidays
    3. Any time the flashers are on
    4. If immovable, or seen 125 m each way

57. A Class D licence covers motor vehicles heavier than what gross or registered gross weight?

    1. 11,000 kg
    2. 4,500 kg
    3. 14,000 kg
    4. 4,600 kg

58. Going down a gentle hill, how can you save fuel?

    1. Ride the brakes
    2. Back off the accelerator
    3. Keep steady throttle
    4. Shift into neutral

59. You notice a gap between a wheel nut and the wheel. What does it suggest?

    1. Over-tightened nuts, a minor defect
    2. A minor cosmetic issue only
    3. Normal heat expansion, not a defect
    4. A loose fastener: major

60. What colour are the flags for an oversize load?

    1. Any bright colour
    2. Yellow or green
    3. Bright red or orange
    4. Blue or white

61. In what order is the daily inspection test done?

    1. Interior, exterior, in-cab
    2. In-cab, interior, exterior
    3. Any order you choose
    4. Exterior, in-cab check, interior

62. Why shouldn't you drive on or block the shoulder of a freeway in traffic?

    1. It sets off the speed cameras
    2. It is reserved for city buses
    3. Emergency vehicles may use it
    4. It wears out your tires faster

63. Which foot should you use for both the brake and accelerator?

    1. Either foot at random
    2. The right foot
    3. Left for brake, right for gas
    4. The left foot

64. Which document must a straight-truck driver carry and surrender on demand?

    1. The CVOR certificate or a true copy
    2. The driver's high school diploma
    3. The shipper's latest tax return
    4. The truck's original purchase contract

65. An orange sign warns of milled or grooved pavement. What can be affected?

    1. Your radio reception
    2. Your fuel gauge
    3. Your stopping ability
    4. Your mirror alignment

66. From which part of the lane should you approach a curve in a large truck?

    1. The inside of the lane
    2. The outside of the lane
    3. The centre line
    4. The shoulder

67. Checking power-assisted hydraulic brakes, what do you do first with the engine stopped?

    1. Open the bleed screws
    2. Set the parking brake twice
    3. Hold the pedal down hard
    4. Pump the pedal several times

68. A 68-year-old DZ driver builds up three demerit points. What is required at renewal?

    1. Only a medical form from a doctor
    2. Only a vision test at renewal
    3. Only a new photo for the card
    4. Vision, knowledge and road tests

69. After 8 hours off, you start at 5 a.m. After what time may you not drive, regardless of driving hours?

    1. 7 p.m. (14 hours later)
    2. 9 p.m. (16 hours later)
    3. 5 a.m. next day
    4. 6 p.m. (13 hours later)

70. Your truck has lane-keeping assist. Can you still be charged with careless driving?

    1. Yes, you must stay in control
    2. No, the system is responsible
    3. Only on city streets
    4. Only at night

71. Who must accompany a Class G driver learning to drive a heavy straight truck?

    1. Any driver with five years' experience
    2. A Class D (or higher) licence holder
    3. A Class G driver over 25
    4. A licensed DriveTest examiner

72. How much can snow-covered roads raise fuel use?

    1. 1 to 2 per cent
    2. 50 per cent
    3. 15 to 20 per cent
    4. It has no effect

73. Who must install wheels and tires on a commercial vehicle?

    1. Any service station attendant on duty
    2. A certified installer or mechanic
    3. Any driver who carries a jack
    4. The shipper's loading-dock staff

74. Your load of pipe overhangs the rear by 1.2 m. Is a red flag required by the overhang rule?

    1. Yes, any overhang needs one
    2. No, the rule starts at 1.5 m
    3. Yes, at 1 m or more
    4. Only on gravel roads

75. You forget the daily inspection report for your test truck. What happens?

    1. You lose one point only
    2. You fill it in after the test
    3. The examiner writes one for you
    4. The road test is cancelled

76. Who can receive the fine if a truck illegally passes a school bus and the driver is not charged?

    1. The registered owner
    2. No one at all
    3. The school bus driver
    4. The shipper of the load

77. What happens if you shift without using the clutch?

    1. The brakes adjust themselves
    2. Fuel economy improves
    3. Transmission gear teeth wear down
    4. The engine runs cooler

78. What identifies the class of dangerous goods on a truck or pallet?

    1. A flashing amber light
    2. The colour of the truck cab
    3. Safety marks, placards or labels
    4. The driver's uniform

79. What do EDR signs along a road mark?

    1. Electric vehicle charging points
    2. Express delivery truck routes
    3. A detour around a highway closure
    4. Exits reserved for dump trucks

80. Turning left at an island, what can hit a sign post if you do not watch it?

    1. Your roof lights
    2. The rear of your truck
    3. Your front bumper only
    4. Your side mirror only

81. During the air-loss test, what range must system pressure be in?

    1. Below 60 psi
    2. Above the safety valve setting
    3. Between cut-in and cut-out
    4. Exactly 150 psi

82. About how early does the medical report notice arrive before it is due?

    1. Five years
    2. One week
    3. One year
    4. Three months

83. Which regulation sets Ontario's hours-of-service rules?

    1. O. Reg. 199/07
    2. O. Reg. 587
    3. O. Reg. 555/06
    4. O. Reg. 363/04

84. A person is hurt in a collision and there is no fire danger. What should you do?

    1. Move them into your cab
    2. Drive them to the hospital
    3. Have them walk around
    4. Leave them where they are

85. With Class D, what is the heaviest trailer you may tow behind your truck?

    1. 11,000 kg
    2. 2,000 kg
    3. 4,600 kg
    4. Any weight

86. How should your tires be inflated for best fuel economy?

    1. As low as safely possible
    2. 10 psi below the maximum
    3. As the tire maker says
    4. Based on the load only

87. Besides the pre-trip check, what must a driver do about vehicle condition?

    1. Check it only at weigh scales
    2. Nothing until the next day
    3. Monitor it throughout the trip
    4. Check it only after a collision

88. How must a load of loose gravel be carried so none falls off?

    1. Wetted down only
    2. Covered or otherwise secured
    3. Heaped as high as possible
    4. Carried only at night

89. Leaving the curb after the roadside stop, which signal do you use?

    1. Four-way flashers only
    2. No signal at all is needed
    3. Left signal, flashers off
    4. The right turn signal

90. A school crossing guard displays a stop sign. When may you proceed?

    1. After a full stop of five seconds
    2. When all, guard included, are clear
    3. When the children reach the centre line
    4. When the guard lowers the sign halfway

91. Why should you operate the differential lock valve now and then?

    1. To drain water from it
    2. To recharge the air tanks
    3. To make sure it moves freely
    4. To reset the odometer

92. Your loaded flatbed is 4.3 m tall. What is the problem?

    1. Only a problem on 400-series roads
    2. Nothing, the limit is 4.5 m
    3. Only a problem at night
    4. It exceeds the 4.15 m height limit

93. A sign warns that a structure ahead may not allow room for tall vehicles. What should a tall truck do?

    1. Speed up under it
    2. Choose another route
    3. Drive in the centre
    4. Lower its tire pressure

94. Why is turning a heavy straight truck different from turning a car?

    1. The steering works in reverse
    2. The rear wheels cut inside
    3. The truck pivots on its centre
    4. The front wheels slide outward

95. You hear an air leak during your circle check. What should you do next?

    1. Ignore it if pressure is normal
    2. Drive and recheck tomorrow
    3. Do the air-loss rate test
    4. Add an alcohol evaporator

96. Your new licence arrives in the mail. What do you do with the old one?

    1. Destroy it
    2. Give it to your employer
    3. Keep it as a spare
    4. Mail it to the insurer

97. Which information about duty status changes must the daily log show?

    1. What you ate at each stop
    2. Where each change happened
    3. Who you spoke to on the phone
    4. The music you listened to

98. Entering a tunnel on a bright day, what should you do?

    1. Keep your sunglasses on inside
    2. Slow down, sunglasses off, lights on
    3. Speed up to get through it sooner
    4. Switch on your high beams

99. Which class is a school-purposes bus with at most 24 passengers?

    1. Class C
    2. Class B
    3. Class F
    4. Class E

100. What separates an HOV lane from the general lanes?

     1. A concrete wall
     2. A grass median
     3. Nothing at all
     4. A striped buffer