Alberta Class 1 Knowledge Practice Test 2026: Oefenexamen 4

1. Vraag 1 van 25

   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
   Toon antwoord

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

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

2. Vraag 2 van 25

   In which languages is the Alberta air brake knowledge test offered?

   • AEnglish, French and Punjabi
   • BEnglish and French
   • CEnglish only
   • DAny language with a translator
   Toon antwoord

   Antwoord: C. English only

   The electronic test is in English only. Paper and translated versions are not offered.

3. Vraag 3 van 25

   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
   Toon antwoord

   Antwoord: D. The S-shaped cam turning

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

4. Vraag 4 van 25

   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
   Toon antwoord

   Antwoord: B. About 0.75 seconds

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

5. Vraag 5 van 25

   A farmer applies for Class 1 to drive a farm-registered tractor-trailer. Does the farmer need air brake training?

   • ANo, farm-registered vehicles are always exempt
   • BYes, Class 1 applicants must show air brake training
   • COnly if the farmer drives in a city
   • DOnly for trailers longer than 53 feet
   Toon antwoord

   Antwoord: B. Yes, Class 1 applicants must show air brake training

   Class 1 applicants must show proof of air brake training even when the vehicle is registered as a farm vehicle.

6. Vraag 6 van 25

   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
   Toon antwoord

   Antwoord: A. 4 psi

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

7. Vraag 7 van 25

   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
   Toon antwoord

   Antwoord: 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.

8. Vraag 8 van 25

   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
   Toon antwoord

   Antwoord: 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.

9. Vraag 9 van 25

   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
   Toon antwoord

   Antwoord: D. 120 to 135 psi

   The governor should cut out between 120 and 135 psi.

10. Vraag 10 van 25

    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
    Toon antwoord

    Antwoord: 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.

11. Vraag 11 van 25

    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
    Toon antwoord

    Antwoord: C. Your Notice of Air Brake Program Completion

    Bring the Notice you received after passing the practical assessment.

12. Vraag 12 van 25

    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
    Toon antwoord

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

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

13. Vraag 13 van 25

    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
    Toon antwoord

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

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

14. Vraag 14 van 25

    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
    Toon antwoord

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

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

15. Vraag 15 van 25

    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
    Toon antwoord

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

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

16. Vraag 16 van 25

    As you lower the air pressure during the trip test, at what pressure should the park control valve pop out?

    • AIt should never pop out
    • BBetween 60 and 80 psi
    • CBetween 20 and 45 psi
    • DBetween 100 and 120 psi
    Toon antwoord

    Antwoord: C. Between 20 and 45 psi

    The park control valve should pop out between 20 and 45 psi, applying the spring brakes.

17. Vraag 17 van 25

    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
    Toon antwoord

    Antwoord: 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.

18. Vraag 18 van 25

    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
    Toon antwoord

    Antwoord: B. Within 3 minutes

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

19. Vraag 19 van 25

    How long is the minimum classroom session in the Alberta Air Brake Program?

    • A1 hour
    • B40 hours
    • C3 hours
    • D6.5 hours
    Toon antwoord

    Antwoord: D. 6.5 hours

    The classroom session is at least 6.5 hours.

20. Vraag 20 van 25

    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
    Toon antwoord

    Antwoord: A. Pumping wastes air and lowers system pressure

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

21. Vraag 21 van 25

    Do you need a road test to get the Q endorsement?

    • ANo
    • BYes, in a tractor-trailer
    • COnly if you are under 21
    • DYes, in a bus
    Toon antwoord

    Antwoord: A. No

    A practical road test is not required for the air brake endorsement.

22. Vraag 22 van 25

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

    • ARed
    • BYellow
    • CBlue
    • DGreen
    Toon antwoord

    Antwoord: A. Red

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

23. Vraag 23 van 25

    What happens in the practical training part of the program?

    • AYou take apart and rebuild a spring brake chamber
    • BYou drive an air-brake truck on a highway for an hour
    • CYou watch an air brake video at home and sign a form
    • DA 15-minute demonstration, then you practise the pre-trip twice
    Toon antwoord

    Antwoord: D. A 15-minute demonstration, then you practise the pre-trip twice

    Practical training is a 15-minute demonstration followed by two practice pre-trip inspections.

24. Vraag 24 van 25

    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
    Toon antwoord

    Antwoord: A. Apply the spring (parking) brakes

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

25. Vraag 25 van 25

    You fail the air brake knowledge test. When can you try again?

    • ARight away, the same day
    • BOnly after repeating the whole course
    • COn a different day
    • DAfter 6 months
    Toon antwoord

    Antwoord: C. On a different day

    Retests must be taken on a different day.

Toetsenbord: 1–4 om te antwoorden, Enter voor de volgende vraag.

Het echte examen: 25 of 30; the test stops after 6 wrong answers