Ontario Air Brake (Z) overview

Ontario Air Brake (Z): Compliance and safe inspection

Legal duties of drivers and operators, penalties for defective brakes, reporting defects and how to secure a vehicle safely before inspecting it.

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Compliance and safe inspection · Question 1Score 0/0

What penalties can follow for driving a vehicle that does not comply with the law?

Study reference: MTO Air Brake Handbook (online edition, Feb. 2026), Ch. 8 Air Brake Compliance — Safety standards, safe inspection

All 16 questions in this test

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

  1. What penalties can follow for driving a vehicle that does not comply with the law?

    1. Only a written warning
    2. Only demerit points
    3. Only a CVOR audit
    4. From fines up to impoundment
  2. Why should the engine be off for most air brake inspections?

    1. The compressor overheats if running
    2. The gauges only work with it off
    3. Air pressure is higher with it off
    4. Moving engine parts are a hazard
  3. Who can be charged for driving with brake defects or skipping required inspections?

    1. The driver and/or the operator
    2. Only the vehicle manufacturer
    3. Only the driver's trainer
    4. Nobody if no crash occurs
  4. Which safety equipment may be needed while inspecting air brakes?

    1. A high-visibility vest only
    2. A respirator and ear plugs only
    3. Rubber gloves and an apron only
    4. Safety glasses, steel toes, bump cap
  5. Can a vehicle with a defective air brake system be driven to the next town for repair?

    1. Yes, if the trailer is completely empty
    2. Yes, with the four-way flashers on
    3. Yes, if you stay below 50 km/h
    4. No, it may not be driven on any road
  6. Inspections of air-braked vehicles must be done at what frequency?

    1. Only when a warning light comes on
    2. At regular intervals set by law
    3. Only once, before first use
    4. Only after a collision
  7. When must wheel chocks be used during an air brake inspection?

    1. Only if the truck is carrying a load
    2. Only during the governor cut-out test
    3. When you leave the seat with brakes off
    4. Only when parked on gravel surfaces
  8. When is it safe to get under a vehicle during an inspection?

    1. Only if spring brakes or blocks hold it
    2. Only after the trailer has been uncoupled
    3. Whenever the engine has been shut off
    4. Whenever air pressure is above 90 psi
  9. What is the most common reason commercial vehicles are taken out of service?

    1. Expired licence plates
    2. Dirty windshields
    3. Low fuel
    4. Air brakes out of adjustment
  10. Before a test that releases the parking brakes, what keeps the vehicle from rolling?

    1. The trailer hand valve
    2. The low-air warning
    3. The tractor protection valve
    4. Wheel chocks or blocks
  11. Which danger should you avoid while inspecting an air brake system?

    1. Touching the dash gauges
    2. Looking at the brake chamber labels
    3. Reading the inspection schedule
    4. Standing in the path of exhausting air
  12. A truck does not comply with the Highway Traffic Act. Who must keep it off the road?

    1. The driver, operator and owner
    2. Only the mechanic who inspected it
    3. Only the vehicle owner
    4. Only the police officer
  13. Which statement about driving with a known brake defect is correct?

    1. It is legal if you report it afterwards
    2. It is illegal to operate the vehicle
    3. It is legal if the ABS still works
    4. It is legal for short trips under 10 km
  14. By law, what must a driver do on finding an air brake defect?

    1. Report it to the vehicle operator
    2. Ignore it if the truck still stops
    3. Report it only after a collision
    4. Fix it before the next shift
  15. Where should you park to inspect your air brakes?

    1. Away from traffic and other hazards
    2. Beside the fuel pumps
    3. In the right lane with flashers on
    4. On a slight downhill slope
  16. Why should you park on a level surface before inspecting air brakes?

    1. The gauges read wrongly on a slope
    2. The compressor needs level ground to run
    3. Some checks release the parking brakes
    4. The tanks drain faster on a slope

Compliance and safe inspection: key rules to remember

Our summary of what the official handbook says on this topic, in our own words. Read it before or after the practice questions above, then check the original chapter. Read the official chapter ↗

The law

  • When a commercial vehicle does not meet the Highway Traffic Act and regulations, the driver, operator and owner must keep it off every road and highway.
  • Driving a non-compliant vehicle is an offence; penalties range from fines to detainment or impoundment of the vehicle.
  • Driving with defects or failing to do required inspections can lead to charges against the driver and/or the operator.
  • Drivers are required by law to report air brake defects to the vehicle operator.
  • It is illegal to operate or drive a vehicle with a defective air brake system.

Safe inspection practice

  • Park on a level surface, because some checks are done with the parking brakes released.
  • Park away from traffic and other hazards.
  • Turn off the engine for inspections around moving engine parts.
  • Chock the wheels whenever a check requires you to leave the seat with the parking brakes released.
  • Keep out of the path of air exhausting from brake components.
  • Never leave the driver's seat or get under the vehicle unless the spring brakes are applied or the wheels are securely blocked.
  • Wear proper safety equipment such as safety glasses, steel-toe shoes and a bump cap when inspecting.

Context

  • Air brakes out of adjustment are the most common reason a commercial vehicle is taken out of service.
  • A full air brake pre-trip inspection, as set out in the Air Brake Handbook, should be done before the day's trip.

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