Alberta Air Brake (Q) Practice Test 2026: Test d’entraînement 2

1. Question 1 sur 35

   How quickly should the compressor build pressure from 50 to 90 psi at the governed engine speed?

   • AWithin 10 seconds
   • BWithin 3 minutes
   • CWithin 10 minutes
   • DWithin 30 minutes
   Voir la réponse

   Réponse: B. Within 3 minutes

   Compressor build-up from 50 to 90 psi should take no more than three minutes.

2. Question 2 sur 35

   In the Alberta trip test, what is the normal range for governor cut-out pressure?

   • A90 to 100 psi
   • B60 to 80 psi
   • C150 to 175 psi
   • D120 to 135 psi
   Voir la réponse

   Réponse: D. 120 to 135 psi

   The governor should cut out between 120 and 135 psi.

3. Question 3 sur 35

   How far below the cut-out pressure should the governor cut in?

   • AIt cuts in at the same pressure
   • B50 to 60 psi lower
   • C20 to 25 psi lower
   • D1 to 2 psi lower
   Voir la réponse

   Réponse: C. 20 to 25 psi lower

   The cut-in pressure should be about 20 to 25 psi lower than the cut-out pressure.

4. Question 4 sur 35

   In the applied leakage check with full brake application, what is the most a power unit alone may lose in 2 minutes?

   • A4 psi
   • B1 psi
   • C20 psi
   • D10 psi
   Voir la réponse

   Réponse: A. 4 psi

   The guide allows a loss of 4 psi in 2 minutes for a power unit, plus 2 psi for each trailer.

5. Question 5 sur 35

   What is the minimum size of wheel chocks for a commercial vehicle?

   • A10 cm by 10 cm
   • B30 cm by 30 cm
   • C15 cm by 15 cm
   • D5 cm by 5 cm
   Voir la réponse

   Réponse: C. 15 cm by 15 cm

   Wheel chocks must be at least 15 cm by 15 cm.

6. Question 6 sur 35

   About how much time is added to your stopping distance by air brake lag?

   • ANo time at all
   • BAbout 0.4 seconds
   • CAbout 4 seconds
   • DAbout 1 minute
   Voir la réponse

   Réponse: B. About 0.4 seconds

   Air brake lag time is about 0.4 seconds, added to about 0.75 seconds of perception and 0.75 seconds of reaction.

7. Question 7 sur 35

   According to the Commercial Driver's Guide, about how long does it take a driver to perceive a hazard?

   • AAbout 0.1 seconds
   • BAbout 0.75 seconds
   • CAbout 5 seconds
   • DAbout 3 seconds
   Voir la réponse

   Réponse: B. About 0.75 seconds

   Perception time is about 0.75 seconds, and reaction time is about another 0.75 seconds.

8. Question 8 sur 35

   Why should you not pump air brakes during a normal stop?

   • APumping wastes air and lowers system pressure
   • BIt is the only way to stop
   • CIt locks the steering
   • DIt makes the brakes too hot to touch
   Voir la réponse

   Réponse: A. Pumping wastes air and lowers system pressure

   Apply steady pressure and ease off as you slow. Pumping uses up air.

9. Question 9 sur 35

   You are about to descend a hill and the air pressure is dropping abnormally. What should you do?

   • ADo not go down the hill until the problem is fixed
   • BGo down quickly before the pressure is gone
   • CShift to neutral and coast down slowly
   • DUse only the trailer hand valve on the way down
   Voir la réponse

   Réponse: A. Do not go down the hill until the problem is fixed

   Test your brakes before descending, and do not proceed if air pressure drops abnormally.

10. Question 10 sur 35

    Why should you not hold a combination on a hill with only the trailer hand valve?

    • AIt drains the fuel tank and stalls the engine
    • BIt is the safest way to hold a combination
    • CIt turns off the trailer lights and the horn
    • DThe trailer brakes can leak off, and using them alone risks a jackknife
    Voir la réponse

    Réponse: D. The trailer brakes can leak off, and using them alone risks a jackknife

    Do not rely on the trailer hand valve alone. Use the spring brakes to park.

11. Question 11 sur 35

    This diagram shows an air brake system. What drives the air compressor?

    • AThe engine
    • BThe brake pedal
    • CThe trailer wheels
    • DA hand pump
    Voir la réponse

    Réponse: A. The engine

    The compressor is driven by the engine and pumps air into the storage tanks.

12. Question 12 sur 35

    Which part tells the compressor when to start and stop pumping air?

    • AThe foot valve
    • BThe governor
    • CThe slack adjuster
    • DThe brake drum
    Voir la réponse

    Réponse: B. The governor

    The governor senses tank pressure and controls the compressor's cut-in and cut-out.

13. Question 13 sur 35

    Why do air tanks have drain valves?

    • ATo check the tire pressure at each wheel
    • BTo release the parking brakes by hand
    • CTo let fresh air into the tanks
    • DTo remove water and oil that collect in the tanks
    Voir la réponse

    Réponse: D. To remove water and oil that collect in the tanks

    Compressed air leaves water and oil in the tanks. Drain them so they do not freeze or damage valves.

14. Question 14 sur 35

    What happens when you press the brake pedal (foot valve) in an air brake system?

    • AAir is sent to the brake chambers, which apply the brakes
    • BThe spring brakes release so the wheels can turn
    • CThe compressor stops and the tanks are sealed
    • DAir is released from the tires to slow the wheels
    Voir la réponse

    Réponse: A. Air is sent to the brake chambers, which apply the brakes

    The foot valve sends air from the tanks to the brake chambers, which push the rods that apply the brakes.

15. Question 15 sur 35

    What does the slack adjuster do?

    • AIt dries the air before it reaches the tanks
    • BIt turns the brake camshaft when the push rod moves
    • CIt measures the air pressure in the tanks
    • DIt holds the trailer to the tractor
    Voir la réponse

    Réponse: B. It turns the brake camshaft when the push rod moves

    The push rod moves the slack adjuster, which turns the camshaft and forces the shoes against the drum.

16. Question 16 sur 35

    In an S-cam brake, what forces the brake shoes against the drum?

    • AA hydraulic cylinder
    • BMagnets
    • CThe driver's leg strength
    • DThe S-shaped cam turning
    Voir la réponse

    Réponse: D. The S-shaped cam turning

    When the camshaft turns, the S-cam spreads the shoes against the drum.

17. Question 17 sur 35

    What does the safety valve do?

    • AApplies the brakes when you go too fast
    • BReleases air if tank pressure gets too high
    • CRemoves water and oil from the tanks
    • DStops the engine if the air gets too hot
    Voir la réponse

    Réponse: B. Releases air if tank pressure gets too high

    The safety valve protects the tanks from too much pressure by letting air out.

18. Question 18 sur 35

    What is the main safety feature of spring brakes?

    • AThey only work at high speed on highways
    • BThey apply automatically if air pressure is lost
    • CThey replace the service brakes when driving
    • DThey need extra air pressure to apply
    Voir la réponse

    Réponse: B. They apply automatically if air pressure is lost

    Air holds spring brakes off. If pressure is lost, the springs apply the brakes.

19. Question 19 sur 35

    How should you park an air-brake vehicle?

    • AApply the spring (parking) brakes
    • BPut a brick on the brake pedal
    • CHold the service brakes with the trailer hand valve
    • DLeave it in gear only
    Voir la réponse

    Réponse: A. Apply the spring (parking) brakes

    Use the spring brakes to park. Service brakes rely on air, which can leak away.

20. Question 20 sur 35

    What is the advantage of a dual air brake system?

    • AIf one circuit fails, the other can still stop you
    • BIt never needs a pre-trip inspection
    • CIt lets you drive at a higher top speed
    • DIt does not need an air compressor
    Voir la réponse

    Réponse: A. If one circuit fails, the other can still stop you

    A dual system has two separate circuits, so a failure in one still leaves braking from the other.

21. Question 21 sur 35

    Which colour is usually used for the emergency (supply) air line between tractor and trailer?

    • ARed
    • BYellow
    • CBlue
    • DGreen
    Voir la réponse

    Réponse: A. Red

    The emergency or supply line is usually red and the service line is blue.

22. Question 22 sur 35

    What does the tractor protection valve do?

    • AControls the headlights and trailer lights
    • BProtects the tractor's air if the trailer lines break
    • CLocks the fifth wheel jaws around the kingpin
    • DMeasures the trailer's weight on each axle
    Voir la réponse

    Réponse: B. Protects the tractor's air if the trailer lines break

    It closes off the trailer lines so the tractor keeps its air if the trailer breaks away.

23. Question 23 sur 35

    What does a low air pressure warning tell you?

    • AThe compressor is working normally
    • BThe air tanks are completely full
    • CPressure is dropping and you are losing braking ability
    • DThe tires need more air in them
    Voir la réponse

    Réponse: C. Pressure is dropping and you are losing braking ability

    The warning means pressure is low. Stop safely and find the cause before the spring brakes apply.

24. Question 24 sur 35

    What happens to stopping distance when you double your speed?

    • AIt becomes about half as long
    • BIt about doubles
    • CIt stays about the same
    • DIt becomes about four times as long
    Voir la réponse

    Réponse: D. It becomes about four times as long

    Stopping distance grows with the square of speed, so doubling speed makes it about four times as long.

25. Question 25 sur 35

    Your brakes get very hot on a long hill and stop working as well. What is this called?

    • ABrake creep
    • BBrake fade
    • CBrake lock
    • DBrake lag
    Voir la réponse

    Réponse: B. Brake fade

    Overheated brakes lose effectiveness. Use a low gear and engine braking on long grades.

26. Question 26 sur 35

    What is the best way to check whether a brake is out of adjustment?

    • AFeel the tire temperature after a trip
    • BLook at the paint on the brake drum
    • CListen to the brake while driving slowly
    • DMeasure the push rod stroke with the brakes applied
    Voir la réponse

    Réponse: D. Measure the push rod stroke with the brakes applied

    Brake adjustment is checked by measuring push rod stroke with a full brake application.

27. Question 27 sur 35

    Why is moisture in the air system a problem?

    • AIt makes the brakes grab too strongly
    • BIt cools the compressor too much in summer
    • CIt can freeze and block lines and valves
    • DIt is not a problem in a modern system
    Voir la réponse

    Réponse: C. It can freeze and block lines and valves

    Water can freeze and stop valves or lines from working. Drain tanks and use the air dryer.

28. Question 28 sur 35

    Brake lag means the brakes on an air-brake vehicle take time to apply. What does this mean for following distance?

    • AYou can follow more closely
    • BFollowing distance does not matter
    • CYou should brake later
    • DYou need more space ahead than a car does
    Voir la réponse

    Réponse: D. You need more space ahead than a car does

    Air brake lag adds to your stopping distance, so leave a bigger gap.

29. Question 29 sur 35

    Your spring brakes apply suddenly while you are driving. What is the most likely cause?

    • AA serious loss of air pressure
    • BThe trailer is empty and light
    • CThe engine is still too cold
    • DThe governor has cut out normally
    Voir la réponse

    Réponse: A. A serious loss of air pressure

    Spring brakes come on when system pressure drops too low.

30. Question 30 sur 35

    Before starting the air brake test, how should the vehicle be secured?

    • ARelease all brakes
    • BLeave it in neutral without chocks
    • CPark on a hill facing down
    • DPark on level ground and chock the wheels
    Voir la réponse

    Réponse: D. Park on level ground and chock the wheels

    Secure the vehicle with wheel chocks on level ground before testing the brakes.

31. Question 31 sur 35

    What appears on your licence card after you pass the Alberta air brake knowledge test?

    • AThe Q endorsement
    • BA red stripe
    • CNothing changes
    • DA new licence class
    Voir la réponse

    Réponse: A. The Q endorsement

    Passing the knowledge test adds the Q endorsement to your licence card.

32. Question 32 sur 35

    What must you show at the registry agent before you can write the air brake knowledge test?

    • AA letter from your employer or school
    • BYour truck's registration and insurance
    • CYour Notice of Air Brake Program Completion
    • DYour Class 1 road test result
    Voir la réponse

    Réponse: C. Your Notice of Air Brake Program Completion

    Bring the Notice you received after passing the practical assessment.

33. Question 33 sur 35

    After a failed practical reassessment, who decides what additional training you need?

    • AA police officer at a weigh scale
    • BYour insurance company
    • CThe driver training school and the student
    • DThe registry agent who sells you the test
    Voir la réponse

    Réponse: C. The driver training school and the student

    Any additional training is decided by the driver training school and the student.

34. Question 34 sur 35

    In the applied leakage check, what is the most a tractor with one trailer may lose in 2 minutes under the guide's figures?

    • A12 psi
    • B2 psi
    • C4 psi
    • D6 psi
    Voir la réponse

    Réponse: D. 6 psi

    The guide allows 4 psi for the power unit plus 2 psi for each trailer, so 6 psi for a tractor and one trailer.

35. Question 35 sur 35

    Which form is used for the one-on-one air brake practical assessment in Alberta?

    • AA daily log
    • BThe Air Brake Practical Test form
    • CThe vehicle registration form
    • DA trip inspection report
    Voir la réponse

    Réponse: B. The Air Brake Practical Test form

    The practical assessment is done on the Air Brake Practical Test form within 15 minutes.

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

L’examen réel : 25 of 30; the test ends after 6 wrong answers