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Ontario Class D (DZ) overview

Ontario Class D (DZ) Mock Exam 4

Same format as the real test. Answers stay hidden until you submit. The official time limit is not published; the timer is a practice setting.

  • 40 questions
  • untimed
  • Pass mark 32/40
0/40
Mock exam 4 · Question 10 answered

You hold a Class 3 truck licence from another province. What Ontario class do you get?

All 40 questions in this test

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

  1. You hold a Class 3 truck licence from another province. What Ontario class do you get?

    1. The same class
    2. A learner permit
    3. Always Class G
    4. Always Class A

  2. You have driven 11 hours and been on duty 14 hours today. May you drive more?

    1. Yes, up to 13 hours of driving
    2. Yes, after a 30-minute break
    3. No, 14 on-duty hours are reached
    4. Yes, until 16 hours on duty

  3. What does a solid line on the left side of your lane mean?

    1. Parking is allowed
    2. A bike lane is beside you
    3. You may pass freely
    4. It is unsafe to pass

  4. 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

  5. What does an operator's CVOR record include?

    1. The company's current bank balance
    2. All customer delivery addresses
    3. Collisions, convictions, inspections
    4. The driver's full medical history

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

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

  7. During the in-cab check, what do you confirm about the steering wheel?

    1. Secure, with no excess free play
    2. It has a cover fitted on the rim
    3. It is the right colour for the cab
    4. It turns freely with the engine off

  8. 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

  9. 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

  10. 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

  11. Your duty status changes before 3 hours or 240 km. What does this mean for the load?

    1. No check is required
    2. Wait until 240 km
    3. Wait until 3 hours
    4. Re-inspect it now

  12. Which defects can lead to a commercial vehicle being impounded?

    1. A dirty or faded licence plate
    2. A missing fuel receipt in the cab
    3. Critical brake or steering defects
    4. A cracked bracket on one mirror

  13. Roughly how much can professional, smooth shifting improve operating costs?

    1. About 60 per cent
    2. It has no effect
    3. About 30 per cent
    4. About 3 per cent

  14. 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

  15. Which handbook should you use for a full air brake pre-trip inspection?

    1. The CVOR operator's manual
    2. The Official Air Brake Handbook
    3. The Bus Handbook
    4. The Official Driver's Handbook

  16. A local driver is exempt from keeping a log. Who must keep a record of their day?

    1. The police
    2. The customer
    3. The operator
    4. Nobody

  17. How old must you be to apply for a Class D licence?

    1. At least 21
    2. At least 16
    3. At least 18
    4. At least 17

  18. From May 11, 2026, which applicants do NOT need to show work-eligibility documents?

    1. All Class D applicants
    2. Class A applicants over 65
    3. Drivers from other provinces
    4. Class D with RV restriction

  19. How should you back a truck according to the handbook's precautions?

    1. Using only the backup camera
    2. Quickly, to clear traffic sooner
    3. Slowly, with mirrors and a guide
    4. With all the windows closed

  20. Your licence was suspended five years ago and never reinstated. What must you do to drive a DZ truck?

    1. Get a doctor's note and renew
    2. Pay the old fine and renew online
    3. Go through graduated licensing
    4. Take only a Class D road test

  21. After driving through a flooded stretch, what should you do?

    1. Speed up to dry the tires
    2. Test the brakes to dry them
    3. Drain the fuel tank
    4. Turn off the engine

  22. 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

  23. 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

  24. Before timing the air build-up, how low do you first pump the pressure?

    1. To zero
    2. To 100 psi
    3. To 60 psi exactly
    4. To 80 psi or less

  25. Instead of flares or lanterns, which warning devices are acceptable?

    1. Portable reflectors
    2. Cardboard signs
    3. Spare tires
    4. Orange traffic vests

  26. 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

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

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

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

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

  29. Your Class D test truck has hydraulic brakes. Must you bring a pushrod stroke gauge?

    1. Yes, on every Class D test
    2. No, that is for air brakes
    3. Only for the in-cab check
    4. Only if the truck is over 11,000 kg

  30. A sign over the left lane shows a truck with a red slash. What does it mean?

    1. Trucks may pass here
    2. Trucks must use this lane
    3. No trucks in this lane
    4. Truck lane begins

  31. When may a cyclist use the full lane?

    1. Never on city streets
    2. To avoid hazards such as potholes
    3. Only when riding with others
    4. Only on Sundays

  32. Why should you avoid driving in other vehicles' blind spots?

    1. It is illegal on all Ontario roads
    2. It sets off the other vehicles' alarms
    3. It wastes fuel in the long run
    4. You may need room to move over

  33. What can happen if you build up too many demerit points?

    1. Your truck is impounded
    2. Nothing at all happens
    3. Your CVOR is cancelled
    4. Your licence can be suspended

  34. Several trucks leave a rest stop together. How should they enter the highway?

    1. Spaced out at intervals
    2. All at once to save time
    3. Side by side in two lanes
    4. Close together as a convoy

  35. When the backing manoeuvre is finished, what must you do?

    1. Get out and measure the gap
    2. Leave the engine in reverse
    3. Drive forward to the start line
    4. Secure it and tell the examiner

  36. A sign shows a dangerous goods symbol in a red circle with a slash. What does it mean?

    1. Fuel available at the next exit
    2. Dangerous goods route ahead
    3. Fire station entrance ahead
    4. No dangerous goods trucks

  37. You see an air-suspension bag that is damaged and completely flat. How is it classed?

    1. Minor
    2. Minor if the truck is empty
    3. Not a defect
    4. Major

  38. 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

  39. The road ahead looks black and shiny on a cold day. What should you suspect?

    1. A fuel spill
    2. Black ice
    3. Clean dry pavement
    4. Fresh asphalt

  40. 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

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