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Alberta Class 1 Knowledge Practice Test 2026：第4套练习测试

Alberta Class 1 Knowledge Practice Test 练习测试第4套（共5套）：再练25道题，附答案和解释。

  • 商用车辆
  • 艾伯塔省
  • 130道题
  • 核对于2026年10月10日

  1. 第1题，共25题

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

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

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

  2. 第2题，共25题

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

    答案: C. English only

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

  3. 第3题，共25题

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

    答案: D. The S-shaped cam turning

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

  4. 第4题，共25题

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

    答案: B. About 0.75 seconds

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

  5. 第5题，共25题

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

    答案: 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. 第6题，共25题

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

    答案: 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. 第7题，共25题

    Why do air tanks have drain valves?
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    显示答案

    答案: 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. 第8题，共25题

    Why is moisture in the air system a problem?
    显示答案

    答案: 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. 第9题，共25题

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

    答案: D. 120 to 135 psi

    The governor should cut out between 120 and 135 psi.

  10. 第10题，共25题

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

    答案: 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. 第11题，共25题

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

    答案: C. Your Notice of Air Brake Program Completion

    Bring the Notice you received after passing the practical assessment.

  12. 第12题，共25题

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

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

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

  13. 第13题，共25题

    What does the safety valve do?
    显示答案

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

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

  14. 第14题，共25题

    What is the main safety feature of spring brakes?
    显示答案

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

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

  15. 第15题，共25题

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

    答案: 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. 第16题，共25题

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

    答案: C. Between 20 and 45 psi

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

  17. 第17题，共25题

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

    答案: 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. 第18题，共25题

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

    答案: B. Within 3 minutes

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

  19. 第19题，共25题

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

    答案: D. 6.5 hours

    The classroom session is at least 6.5 hours.

  20. 第20题，共25题

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

    答案: A. Pumping wastes air and lowers system pressure

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

  21. 第21题，共25题

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

    答案: A. No

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

  22. 第22题，共25题

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

    答案: A. Red

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

  23. 第23题，共25题

    What happens in the practical training part of the program?
    显示答案

    答案: 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. 第24题，共25题

    How should you park an air-brake vehicle?
    显示答案

    答案: A. Apply the spring (parking) brakes

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

  25. 第25题，共25题

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

    答案: C. On a different day

    Retests must be taken on a different day.

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