Ontario AZ Licence Practice Test 2026: Test d’entraînement 4

1. Question 1 sur 25

   What applies the spring brakes?

   • AThe driver's foot on the pedal
   • BA large spring, which air pressure holds back
   • CAir pressure pushing on the diaphragm
   • DHydraulic fluid
   Voir la réponse

   Réponse: B. A large spring, which air pressure holds back

   Spring brakes are applied by a strong spring and released by air pressure, so they apply when air is lost.

2. Question 2 sur 25

   The low air pressure warning must come on before pressure drops below what level?

   • A690 kPa (100 psi)
   • B380 kPa (55 psi)
   • C138 kPa (20 psi)
   • D552 kPa (80 psi)
   Voir la réponse

   Réponse: B. 380 kPa (55 psi)

   The warning is defective if it does not activate or if it activates below 380 kPa (55 psi). Most activate at 414 kPa (60 psi) or higher.

3. Question 3 sur 25

   What is the adjustment limit for a type 30 long-stroke chamber?

   • A64 mm (2-1/2 inches)
   • B89 mm (3-1/2 inches)
   • C45 mm (1-3/4 inches)
   • D51 mm (2 inches)
   Voir la réponse

   Réponse: A. 64 mm (2-1/2 inches)

   A type 30 long-stroke chamber (with square ports and stroke markings) has a 64 mm (2-1/2 inch) limit.

4. Question 4 sur 25

   How often should you check the push rod stroke (brake adjustment)?

   • AAt least daily
   • BOnly after a crash
   • COnce a month
   • DOnce a year
   Voir la réponse

   Réponse: A. At least daily

   The handbook says brake adjustment should be checked at least daily.

5. Question 5 sur 25

   What helps reduce brake heat on long downgrades?

   • AShifting to neutral
   • BPumping the brake pedal quickly
   • CUsing an engine brake or retarder
   • DTurning off the air compressor
   Voir la réponse

   Réponse: C. Using an engine brake or retarder

   Engine brakes and retarders slow the vehicle without heating the service brakes.

6. Question 6 sur 25

   How do you know the tractor protection valve is defective during the test?

   • AThe low air warning comes on at 414 kPa (60 psi)
   • BAir exhausts from the trailer service line when you press the pedal
   • CThe trailer spring brakes apply when you close the supply valve
   • DThe governor cuts out at 828 kPa (120 psi)
   Voir la réponse

   Réponse: B. Air exhausts from the trailer service line when you press the pedal

   With the trailer supply closed, pressing the pedal should not send air out of the trailer service line.

7. Question 7 sur 25

   When draining the air tanks at the end of the pre-trip check, which tank do you drain first?

   • AThe primary tank
   • BThe secondary tank
   • CThe supply (wet) tank
   • DThe trailer tank
   Voir la réponse

   Réponse: C. The supply (wet) tank

   Drain the supply tank first, because it collects most of the water and oil, then check each drain valve.

8. Question 8 sur 25

   In the air brake practical exam, which brake adjustment method must you demonstrate?

   • AAdjusting the slack adjusters yourself
   • BThe applied push rod stroke measurement method
   • CKicking the tires
   • DListening to the brakes while driving
   Voir la réponse

   Réponse: B. The applied push rod stroke measurement method

   Candidates must show the applied method of measuring push rod stroke.

9. Question 9 sur 25

   Which item must you bring to the air brake practical test?

   • AWheel chocks and a watch or stopwatch with a second hand
   • BA tire iron and a jack for the steering axle
   • CA spare brake chamber and a set of wrenches
   • DA second licensed driver to hold the steering wheel
   Voir la réponse

   Réponse: A. Wheel chocks and a watch or stopwatch with a second hand

   Bring wheel chocks, a timing device, a way to hold the brake pedal down and tools to mark and measure push rod stroke.

10. Question 10 sur 25

    What does the air dryer do?

    • ADries the tires after driving through rain
    • BRemoves moisture before air enters the supply tank
    • CMeasures the air pressure in each tank
    • DHeats the brake drums so they work in winter
    Voir la réponse

    Réponse: B. Removes moisture before air enters the supply tank

    The air dryer removes moisture before the air reaches the supply tank.

11. Question 11 sur 25

    If you double both your weight and your speed, how much longer is the stopping distance?

    • ATwo times longer
    • BFour times longer
    • CEight times longer
    • DSixteen times longer
    Voir la réponse

    Réponse: C. Eight times longer

    Doubling both weight and speed makes the stopping distance eight times longer.

12. Question 12 sur 25

    What is the first step to get a Z endorsement in Ontario?

    • ATake an air brake endorsement course from an approved provider
    • BPass a medical exam at a hospital or clinic
    • CDrive a vehicle with air brakes for six months
    • DBook a road test in a tractor-trailer at DriveTest
    Voir la réponse

    Réponse: A. Take an air brake endorsement course from an approved provider

    You first take an air brake course from a fleet owner, community college or safety organization.

13. Question 13 sur 25

    What is the adjustment limit for a standard type 30 clamp-type brake chamber?

    • A76 mm (3 inches)
    • B32 mm (1-1/4 inches)
    • C51 mm (2 inches)
    • D64 mm (2-1/2 inches)
    Voir la réponse

    Réponse: C. 51 mm (2 inches)

    A standard type 30 chamber has an adjustment limit of 51 mm (2 inches).

14. Question 14 sur 25

    As air pressure drops, in what range does the trailer supply valve close by itself?

    • A0 to 69 kPa (0 to 10 psi)
    • B552 to 690 kPa (80 to 100 psi)
    • C138 to 311 kPa (20 to 45 psi)
    • D690 to 828 kPa (100 to 120 psi)
    Voir la réponse

    Réponse: C. 138 to 311 kPa (20 to 45 psi)

    The trailer supply valve pops out automatically between 138 and 311 kPa (20 and 45 psi).

15. Question 15 sur 25

    You find an air brake defect during your inspection. What does Ontario law say about driving the vehicle?

    • AIt is illegal to drive a defective vehicle, and you must report the defect
    • BYou may drive it if the load is light or the trailer is empty
    • CYou may drive it if you drive carefully and below 50 km/h
    • DYou may drive it for up to 7 days before getting it fixed
    Voir la réponse

    Réponse: A. It is illegal to drive a defective vehicle, and you must report the defect

    Drivers must report defects, and it is illegal to drive a defective vehicle.

16. Question 16 sur 25

    How long do you watch the gauge during the air-loss rate test?

    • A5 minutes
    • B15 minutes
    • C1 minute
    • D10 seconds
    Voir la réponse

    Réponse: C. 1 minute

    The air-loss test measures the pressure drop over one minute.

17. Question 17 sur 25

    What makes an air tank defective in the mechanical inspection?

    • AIt is not securely mounted
    • BIt has some water in it before draining
    • CIt has a drain valve
    • DIt is painted
    Voir la réponse

    Réponse: A. It is not securely mounted

    Air tanks must be securely mounted.

18. Question 18 sur 25

    What are foundation brakes?

    • AThe brake parts at each wheel, such as drums and shoes
    • BThe concrete pads that trucks park on at terminals
    • CThe brakes on the trailer's landing gear legs
    • DThe engine brake that slows the vehicle on hills
    Voir la réponse

    Réponse: A. The brake parts at each wheel, such as drums and shoes

    Foundation brakes are the wheel-mounted parts, such as drums or rotors and shoes or pads, worked by the air system.

19. Question 19 sur 25

    At about what pressure does the supply tank safety valve normally open?

    • A690 kPa (100 psi)
    • B552 kPa (80 psi)
    • C1380 kPa (200 psi)
    • D1035 kPa (150 psi)
    Voir la réponse

    Réponse: D. 1035 kPa (150 psi)

    The safety valve protects the system from too much pressure. It normally opens at 1035 kPa (150 psi).

20. Question 20 sur 25

    During the build-up test, how long may it take for pressure to rise from 587 to 690 kPa (85 to 100 psi) at 600 to 900 rpm?

    • ANo more than 10 seconds
    • BNo more than 2 minutes
    • CNo more than 5 minutes
    • DNo more than 10 minutes
    Voir la réponse

    Réponse: B. No more than 2 minutes

    If build-up from 587 to 690 kPa takes more than two minutes, the system is defective.

21. Question 21 sur 25

    How do you test the spring (parking) brakes' holding ability?

    • AWith them applied, gently apply engine power and see if they hold
    • BDrain all the air tanks first, then try to roll the vehicle
    • CDrive at highway speed and pull the parking brake control
    • DRelease the spring brakes and push the pedal hard
    Voir la réponse

    Réponse: A. With them applied, gently apply engine power and see if they hold

    The spring brakes are defective if they do not hold the vehicle still when engine power is applied gently.

22. Question 22 sur 25

    Which brake drum condition is a defect?

    • AA crack or break in the drum
    • BA drum that is warm after driving
    • CDust on the outside of the drum
    • DA drum painted black
    Voir la réponse

    Réponse: A. A crack or break in the drum

    Inspect brake drums or rotors for cracks or breaks.

23. Question 23 sur 25

    According to the Ontario handbook, what is the highest allowed governor cut-out pressure?

    • A1200 kPa (175 psi)
    • B828 kPa (120 psi)
    • C1000 kPa (145 psi)
    • D1035 kPa (150 psi)
    Voir la réponse

    Réponse: C. 1000 kPa (145 psi)

    The cut-out pressure must not be above 1000 kPa (145 psi).

24. Question 24 sur 25

    What is the difference between version 1 and version 2 of the air brake practical test?

    • AVersion 2 is only for people who failed version 1 before
    • BVersion 1 is for buses and version 2 is for straight trucks only
    • CVersion 1 is given in English and version 2 is given in French
    • DVersion 1 is for tractor-trailer air systems; version 2 is for other vehicles
    Voir la réponse

    Réponse: D. Version 1 is for tractor-trailer air systems; version 2 is for other vehicles

    Version 1 covers vehicles with a tractor-trailer air brake system; version 2 covers vehicles without that system.

25. Question 25 sur 25

    In Ontario, which vehicles need a Z endorsement on your licence?

    • AOnly tractor-trailers with a trailer over 4,600 kg
    • BVehicles with air brakes or air-over-hydraulic brakes
    • COnly school buses and other passenger vehicles
    • DAny vehicle with anti-lock brakes, of any type
    Voir la réponse

    Réponse: B. Vehicles with air brakes or air-over-hydraulic brakes

    You need a Z endorsement to drive any vehicle with air brakes or air-over-hydraulic brakes.

Clavier : 1–4 pour répondre, Entrée pour la question suivante.