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Ontario AZ practice test

For Ontario Class A (AZ) and Class D (DZ) applicants studying The Official MTO Truck Handbook. 45 questions on licence classes, daily inspections, air brake checks, hours of service, speed limiters, size limits, emergencies, school buses and railway crossings. Your progress is saved on this device.

Our own questions, each answered from The Official MTO Truck Handbook. The handbook does not state the real test’s pass mark, so the exam simulation uses an 80% target. The Z (air brake) endorsement has its own test: Z air brake practice test.

All 45 questions with answers

For reading through. Tap "Show answer" under a question to see the answer and the reason.

  1. A Class A licence lets you drive a motor vehicle towing vehicles with a total gross weight over:

    1. 4,600 kg
    2. 2,000 kg
    3. 11,000 kg
    4. 14,000 kg
    Show answer
    A. 4,600 kg Class A covers a motor vehicle and towed vehicles over 4,600 kg (10,000 lb) in total, plus vehicles in classes D and G. (MTO Truck Handbook: A and D licence classes)

  2. A Class D licence covers a motor vehicle over what gross weight?

    1. 11,000 kg
    2. 14,000 kg
    3. 4,600 kg
    4. 4,500 kg
    Show answer
    A. 11,000 kg Class D: a motor vehicle over 11,000 kg (24,000 lb) gross or registered gross weight, towing no more than 4,600 kg. (MTO Truck Handbook: A and D licence classes)

  3. You pass your Class A road test in a combination whose trailer has no air brakes. What licence do you get?

    1. Class A with a Z condition
    2. Class D
    3. Full Class A
    4. AR (A Restricted)
    Show answer
    D. AR (A Restricted) A road test on a vehicle that is not a full Class A configuration (air brakes on truck and trailer) gives an AR licence, which does not allow driving a full Class A vehicle. (MTO Truck Handbook: A and D licence classes)

  4. What is the minimum age to apply for a Class A or D licence in Ontario?

    1. 21
    2. 16
    3. 18
    4. 19
    Show answer
    C. 18 Applicants must be at least 18 and hold a valid Class G or higher licence. (MTO Truck Handbook: A and D licence classes)

  5. From January 1, 2027, how long must you have held a Class G (or higher) licence before taking the Class A road test?

    1. 6 months
    2. No minimum
    3. 3 months
    4. 2 years
    Show answer
    A. 6 months As of January 1, 2027, Class A road test candidates must have held a Class G or higher licence for at least 6 months. (MTO Truck Handbook: A and D licence classes)

  6. A CVOR certificate is needed to operate trucks with a registered or actual weight over:

    1. 11,000 kg
    2. 26,000 kg
    3. 4,500 kg
    4. 3,000 kg
    Show answer
    C. 4,500 kg Trucks over 4,500 kg (9,920 lb) and buses designed to carry 10 or more passengers need a Commercial Vehicle Operator’s Registration certificate. (MTO Truck Handbook: CVOR)

  7. What does an original CVOR certificate cost?

    1. $500
    2. $255
    3. $55
    4. $150
    Show answer
    B. $255 A fee of $255 applies for the application and issue of an original CVOR certificate. (MTO Truck Handbook: CVOR)

  8. What is the maximum width of a commercial motor vehicle in Ontario?

    1. 2.6 metres
    2. 2.4 metres
    3. 3.2 metres
    4. 3.0 metres
    Show answer
    A. 2.6 metres 2.6 metres (8.5 ft). Mirrors are not counted if they extend no more than 30 cm beyond each side. (MTO Truck Handbook: size limits)

  9. What is the maximum height for a vehicle and its load in Ontario?

    1. 4.5 metres
    2. 3.9 metres
    3. 4.15 metres
    4. 4.8 metres
    Show answer
    C. 4.15 metres 4.15 metres (13.6 ft), so there is clearance at bridges and overpasses. (MTO Truck Handbook: size limits, clearances)

  10. What is the maximum length of a combination of vehicles, other than approved double-trailer combinations?

    1. 23 metres
    2. 25 metres
    3. 20 metres
    4. 40 metres
    Show answer
    A. 23 metres No combination may exceed 23 metres (75.5 ft), except double-trailer combinations meeting special requirements. (MTO Truck Handbook: size limits)

  1. Within how many hours before driving must a Schedule 1 inspection have been done and an inspection report completed?

    1. 12 hours
    2. 48 hours
    3. 24 hours
    4. 8 hours
    Show answer
    C. 24 hours A driver may not drive a truck unless a Schedule 1 inspection was done and a report completed within the previous 24 hours. (MTO Truck Handbook: daily trip inspection)

  2. According to the handbook, what is the most common reason commercial vehicles are taken out of service?

    1. Expired permits
    2. Burnt-out lights
    3. Worn tires
    4. Out-of-adjustment air brakes
    Show answer
    D. Out-of-adjustment air brakes Out-of-adjustment air brakes, followed by insecure loads, defective lights or tires and broken springs. (MTO Truck Handbook: daily trip inspection)

  3. In the air pressure build-up test, a minor defect is recorded when pressure takes longer than how long to rise from 85 to 100 psi?

    1. 1 minute
    2. 5 minutes
    3. 30 seconds
    4. 2 minutes
    Show answer
    D. 2 minutes More than two minutes to build from 85 to 100 psi is a minor defect. (MTO Truck Handbook: daily inspection test)

  4. The low-air warning is a major defect if it fails to come on, or comes on before pressure drops below:

    1. 55 psi
    2. 40 psi
    3. 80 psi
    4. 100 psi
    Show answer
    A. 55 psi It is a major defect if the warning does not activate, or activates before the air pressure falls below 55 psi. (MTO Truck Handbook: daily inspection test)

  5. In the air leakage test, what is the maximum loss allowed in one minute for a Class A combination?

    1. 3 psi
    2. 6 psi
    3. 4 psi
    4. 2 psi
    Show answer
    C. 4 psi 4 psi (28 kPa) in one minute for Class A; 3 psi (21 kPa) for Class D. (MTO Truck Handbook: daily inspection test)

  6. Movement between the upper and lower coupler of a fifth wheel must not be more than:

    1. 1 in (25 mm)
    2. 1/4 in (6 mm)
    3. 2 in (50 mm)
    4. 1/2 in (13 mm)
    Show answer
    D. 1/2 in (13 mm) More than 1/2 inch (13 mm) forward or rearward movement is a defect; for a pintle hook and drawbar eye the limit is 3/8 inch (10 mm). (MTO Truck Handbook: daily inspection test)

  7. What minimum tread depth does the handbook give for steer tires?

    1. 2 mm
    2. 1.5 mm
    3. 5 mm
    4. 3 mm
    Show answer
    D. 3 mm 3 mm for steer tires and 1.5 mm for other tires. (MTO Truck Handbook: daily inspection test)

  8. Under Ontario’s hours of service rules, how many hours off duty must a driver have in a day?

    1. 12
    2. 8
    3. 10
    4. 14
    Show answer
    C. 10 At least 10 hours off duty in a day. A driver cannot drive more than 13 hours or after 14 hours on duty in a day. (MTO Truck Handbook: hours of service (O. Reg. 555/06))

  9. After at least 8 hours off duty, a driver may not drive after how many hours have elapsed?

    1. 14
    2. 18
    3. 16
    4. 13
    Show answer
    C. 16 16 hours. Within that, no more than 13 hours of driving and no driving after 14 hours on duty. (MTO Truck Handbook: hours of service)

  10. On the 7-day cycle, a driver cannot drive after being on duty for:

    1. 70 hours
    2. 60 hours
    3. 120 hours
    4. 80 hours
    Show answer
    A. 70 hours 70 hours in 7 consecutive days. The 14-day cycle allows 120 hours, with no more than 70 hours before 24 consecutive hours off. (MTO Truck Handbook: hours of service)

  11. How long off duty resets the 14-day cycle?

    1. 48 hours
    2. 24 hours
    3. 36 hours
    4. 72 hours
    Show answer
    D. 72 hours 72 consecutive hours off starts a new 14-day cycle; 36 consecutive hours resets the 7-day cycle. (MTO Truck Handbook: hours of service)

  12. Every driver must have had at least how many consecutive hours off duty in the preceding 14 days?

    1. 36
    2. 48
    3. 24
    4. 10
    Show answer
    C. 24 On any day, all drivers must have had at least 24 consecutive hours off duty in the preceding 14 days. (MTO Truck Handbook: hours of service)

  13. A driver is exempt from keeping a daily log if they drive solely within a radius of how far from where they start the day?

    1. 250 km
    2. 160 km
    3. 80 km
    4. 100 km
    Show answer
    B. 160 km Within 160 km of the location where the driver starts the day, among the other conditions of the exemption. (MTO Truck Handbook: hours of service)

  14. Speed limiters on regulated trucks must be set to no more than:

    1. 110 km/h
    2. 90 km/h
    3. 100 km/h
    4. 105 km/h
    Show answer
    D. 105 km/h 105 km/h (65 mph), on trucks built in 1995 or later with an MGVWR of 11,794 kg (26,000 lb) or more and an electronically controlled engine. (MTO Truck Handbook: driver conduct)

  15. On a highway above 60 km/h, what minimum distance must a commercial motor vehicle keep from other vehicles, except when passing?

    1. 60 metres
    2. 100 metres
    3. 30 metres
    4. 150 metres
    Show answer
    A. 60 metres At least 60 metres (200 ft) when travelling above 60 km/h, except when overtaking and passing. (MTO Truck Handbook: driver conduct)

  1. When should you switch to low beams for an oncoming vehicle?

    1. Within 150 metres
    2. Within 300 metres
    3. Only in towns
    4. Within 60 metres
    Show answer
    A. Within 150 metres Within 150 metres (500 ft) of an oncoming vehicle, and when following within 60 metres (200 ft). (MTO Truck Handbook: driving at night)

  2. The handbook says you should drive within how much of the posted limit when conditions permit, without exceeding it?

    1. 30 km/h
    2. 5 km/h
    3. 20 km/h
    4. 10 km/h
    Show answer
    D. 10 km/h Within 10 km/h of the posted limit if conditions permit, without going over it. (MTO Truck Handbook: road test)

  3. If you cannot move off the roadway in a zone over 60 km/h when visibility is limited, where do you put the warning devices?

    1. On the cab roof
    2. Only behind, 10 metres back
    3. About 30 metres to the front and to the rear
    4. 150 metres behind only
    Show answer
    C. About 30 metres to the front and to the rear Set out one warning device about 30 metres (100 ft) to the front and one to the rear of the vehicle. (MTO Truck Handbook: dealing with emergencies)

  4. A collision must be reported to police when there are injuries, or when damage exceeds:

    1. $5,000
    2. $1,000
    3. $2,000
    4. $10,000
    Show answer
    A. $5,000 Injuries or damage over $5,000. Below that you must still exchange information with anyone whose vehicle was damaged. (MTO Truck Handbook: dealing with emergencies)

  5. It is illegal to follow within how far of a fire vehicle or ambulance responding to a call?

    1. 300 metres
    2. 150 metres
    3. 50 metres
    4. 100 metres
    Show answer
    B. 150 metres Within 150 metres in any lane going in the same direction. (MTO Truck Handbook: particular situations)

  6. Coming up behind a stopped school bus with its upper red lights flashing, you must stop at least:

    1. 10 metres away
    2. 30 metres away
    3. 5 metres away
    4. 20 metres away
    Show answer
    D. 20 metres away At least 20 metres away, and remain stopped until the stop arm folds away and the lights stop flashing. (MTO Truck Handbook: stopping for school buses)

  7. What is the penalty for a first offence of failing to stop for a school bus with red lights flashing?

    1. $400 to $2,000 and 6 demerit points
    2. $110 and 2 points
    3. $1,000 and licence suspension only
    4. A warning
    Show answer
    A. $400 to $2,000 and 6 demerit points A fine of $400 to $2,000 and six demerit points; a second conviction within five years is $1,000 to $4,000 and six points, and jail is possible. (MTO Truck Handbook: stopping for school buses)

  8. If a train is coming, how far from the nearest rail or gate must you stop?

    1. At least 5 metres
    2. At least 15 metres
    3. At least 30 metres
    4. At least 2 metres
    Show answer
    A. At least 5 metres At least five metres from the nearest rail or gate, and do not cross until you are sure the train or trains have passed. (MTO Truck Handbook: stopping at railway crossings)

  9. How long do demerit points stay on your Ontario record?

    1. Five years
    2. One year
    3. Three years
    4. Two years from the date of the offence
    Show answer
    D. Two years from the date of the offence Two years from the date of the offence. (MTO Truck Handbook: demerit point system)

  10. How soon must you tell the Ministry of Transportation after changing your name or address?

    1. Within 30 days
    2. At your next renewal
    3. Within 6 days
    4. Within 60 days
    Show answer
    C. Within 6 days Within six days. (MTO Truck Handbook: keeping your licence)

  11. How often must a commercial driver under 46 (not Class D) submit a medical report?

    1. Every 5 years
    2. Every year
    3. Every 3 years
    4. Only at the first application
    Show answer
    A. Every 5 years Every five years under 46, every three years from 46 to 64. (MTO Truck Handbook: keeping your licence)

  12. A commercial vehicle may use an HOV lane only if it has two or more people and is shorter than:

    1. 8 metres
    2. 12.5 metres
    3. 10 metres
    4. 6.5 metres
    Show answer
    D. 6.5 metres Two or more occupants and under 6.5 metres in total length. (MTO Truck Handbook: HOV lanes)

  13. After getting under way, how soon should you check your brakes?

    1. After the first kilometre
    2. Within 15 metres
    3. At the first stop sign
    4. Within 100 metres
    Show answer
    B. Within 15 metres Immediately after the vehicle is under way, within at least 15 metres (50 ft). (MTO Truck Handbook: putting the vehicle in motion)

  14. A slow-moving vehicle sign (orange triangle, red border) means the vehicle travels at:

    1. Any speed
    2. 40 km/h or less
    3. 60 km/h or less
    4. 80 km/h or less
    Show answer
    B. 40 km/h or less It warns that the vehicle will travel at 40 km/h or less, such as farm tractors and machinery. (MTO Truck Handbook: signs)

  15. Freeway interchange numbers in Ontario tell you:

    1. The distance in kilometres from the beginning of the freeway
    2. The speed limit at the exit
    3. The highway’s number
    4. The order of exits from the nearest city
    Show answer
    A. The distance in kilometres from the beginning of the freeway Exit 204 on Highway 401 is 204 km from Windsor, where the freeway begins, so subtracting two numbers gives the distance between them. (MTO Truck Handbook: signs)

  1. According to the handbook, drowsy-driving collisions tend to happen most between:

    1. 6 p.m. and 9 p.m.
    2. 6 a.m. and 9 a.m.
    3. 10 a.m. and noon
    4. 2 a.m. and 6 a.m., and 2 p.m. and 4 p.m.
    Show answer
    D. 2 a.m. and 6 a.m., and 2 p.m. and 4 p.m. Late night and early morning (2 to 6 a.m.) and late afternoon (2 to 4 p.m.). (MTO Truck Handbook: particular situations)

  2. You fail to slow down and move over for a stopped emergency vehicle or tow truck with its lights flashing. For a first offence the fine is:

    1. $400 to $2,000
    2. $110
    3. $10,000
    4. $5,000
    Show answer
    A. $400 to $2,000 $400 to $2,000 for a first offence, $1,000 to $4,000 for a subsequent one within five years, with demerit points and a possible licence suspension of up to two years. (MTO Truck Handbook: reacting to a stopped emergency vehicle or tow truck)

  3. A driver aged 21 or under who has been drinking alcohol must have a blood alcohol level of:

    1. Under 0.05
    2. Under 0.08
    3. Zero
    4. Under 0.02
    Show answer
    C. Zero Drivers aged 21 and under must not drive after drinking: their blood alcohol level must be zero. (MTO Truck Handbook: other ways to lose your licence)

  4. What is the maximum length of a long commercial vehicle (LCV) double trailer?

    1. 30 metres
    2. 53 metres
    3. 40 metres
    4. 23 metres
    Show answer
    C. 40 metres An LCV is a double trailer that can be up to 40 metres long; recognise it by its rear placard. (MTO Truck Handbook: signs)

  5. To test your brakes in bad weather, the handbook suggests stopping quickly and firmly from:

    1. 100 km/h
    2. 20 km/h
    3. 80 km/h
    4. 50 km/h
    Show answer
    D. 50 km/h At 50 km/h, when safe, and check that the vehicle stops in a straight line without pulling to one side. (MTO Truck Handbook: driving at night and in bad weather)

About the Class A and D knowledge test

To apply for a Class A or D licence in Ontario you must be at least 18, hold a Class G or higher licence, meet the vision standards, provide a medical certificate, pass a knowledge test on large trucks and tractor-trailers, and pass a road test in the right type of vehicle. Bring two pieces of identification or your Ontario licence, the completed medical report and the test fee.