Ontario Air Brake (Z) Mock Exam 2

All 25 questions in this test

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

1. You use the hand valve and the brake pedal at the same time. What pressure reaches the trailer?

   1. Only the hand valve pressure
   2. The two added together
   3. The higher of the two
   4. The lower of the two

2. From what age must the learning module and practical test be done every year?

   1. 70
   2. 65
   3. 80
   4. 75

3. On a long-stroke chamber, what does the trapezoidal tag under the clamp bolt show?

   1. The brake adjustment limit
   2. The chamber's maximum stroke
   3. The chamber's air pressure rating
   4. The date of last adjustment

4. An air line was repaired with a fitting not approved for air brakes. What is it?

   1. Acceptable for one trip only
   2. Acceptable if it does not leak
   3. Acceptable on trailer lines only
   4. A defect; it is not allowed

5. You hear the supply tank safety valve venting air. What does it mean?

   1. The compressor has just reached cut-in
   2. The tanks are being drained normally
   3. Pressure is too high; repair it now
   4. The spring brakes are releasing now

6. 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

7. What is usually the easiest way to learn your vehicle's brake chamber sizes?

   1. Count the bolts on the clamp ring
   2. Measure the length of the pushrod
   3. Your employer or the owner's manual
   4. Weigh each chamber on a scale

8. The warning came on at 62 psi and went off at 68 psi as pressure rose. Is that a defect?

   1. Yes, it must go off at 55 psi
   2. Yes, it must come on at 80 psi
   3. No, on and off points can differ
   4. Yes, they must be identical

9. 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

10. Why are the primary and secondary tanks called dry tanks?

    1. They hold only alcohol vapour
    2. They are drained by the air dryer
    3. They gather less moisture
    4. They contain no air until braking

11. What protects unused couplers on the towing vehicle from dirt and water?

    1. Plastic bags over the lines
    2. Dead-end or dummy couplers
    3. The trailer hand valve
    4. The tractor protection valve

12. Your brakes overheated on a long grade. What does the handbook advise?

    1. Spray the drums with cold water at once
    2. Keep driving so the airflow cools them
    3. Pump the pedal to spread the heat around
    4. Stop, let them cool, check all brakes

13. Once pushrod stroke passes the adjustment limit, what happens to brake force?

    1. It stays at full strength
    2. It increases slightly
    3. It falls off rapidly toward zero
    4. It shifts to the other axle

14. 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

15. What are the metal trailer air line couplers commonly called?

    1. Glad valves
    2. Kingpins
    3. Gladhands
    4. Clevis pins

16. What is the longest allowed build-up time from 85 to 100 psi?

    1. Five minutes
    2. Two minutes
    3. 30 seconds
    4. Ten minutes

17. What do air brake systems use to produce the force that applies the brakes?

    1. Brake fluid in a master cylinder
    2. Electric motors at each wheel
    3. Compressed air stored in tanks
    4. Vacuum from the engine intake

18. 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

19. Before timing air build-up, what should you do if a trailer is attached?

    1. Drain the trailer tanks
    2. Open the trailer supply valve
    3. Close the trailer supply valve
    4. Apply the trailer hand valve

20. What is a typical normal operating range for an air brake system?

    1. About 60 to 80 psi
    2. About 150 to 170 psi
    3. About 40 to 60 psi
    4. About 100 to 120 psi

21. Below what supply-line pressure must trailer spring brakes apply automatically?

    1. 60 psi (414 kPa)
    2. 120 psi (828 kPa)
    3. 20 psi (138 kPa)
    4. 90 psi (621 kPa)

22. How do you test that the spring brakes can hold the vehicle?

    1. Pump the pedal while they are applied
    2. Apply them while at highway speed
    3. Apply them, then pull gently in low gear
    4. Release them and coast down a hill

23. Who can offer an air brake endorsement course?

    1. Only ServiceOntario offices
    2. Only truck and trailer dealerships
    3. Only DriveTest centres
    4. Fleet owners, colleges, safety groups

24. What does a service brake priority trailer guarantee?

    1. Springs release before any air arrives
    2. Service air comes before springs release
    3. The trailer never needs its tanks drained
    4. Brakes apply only through the hand valve

25. In Ontario, do you need a Z endorsement to drive a truck with air-over-hydraulic brakes?

    1. No, only full air brakes need it
    2. Yes, it is required
    3. Only if the truck is over 11,000 kg
    4. Only when towing a trailer