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    FREE AB Air Brake Practice Test 1 2025

    Based on the 2025 AB CDL manual
    Questions: 20
    Mistakes allowed: 4
    Passing score: 80%
    Ensuring the accuracy and quality of our practice tests is paramount. Learn more about our rigorous standards in our Commitment to Accuracy article.

    Before you may obtain a commercial driver’s licence of any class in Alberta, you must pass a written knowledge test and a practical test. The knowledge test is a multiple-choice test. The test takes about 30 minutes, and you must score at least 80% to pass. The questions on the knowledge test partly depend on which class of commercial licence you’re applying for. (As you would expect, the Class 1 knowledge test may have questions on cargo management, and the Class 2 test may have questions on passenger management and safety.)

    For a Class 1 or Class 2 licence, you’re also required to complete Mandatory Entry-Level Training (MELT). The MELT course will take about 113 hours for Class 1 or 50 hours for Class 2. It includes classroom instruction, yard training (pre-trip inspections and basic maneuvers), and behind-the-wheel driving.

    Nearly all large commercial vehicles (including Class 1 semi-trucks and Class 2 full-size buses) are equipped with air brakes. To be qualified to operate air brakes, you must obtain an Air Brakes (“Q”) endorsement on your commercial licence. An exception is Class 1, for which air brake qualification is a legal requirement. For either a Class 1 licence or the Q endorsement, you must complete an approved air brake course and answer knowledge test questions on air brakes. The course includes 6½ hours of classroom instruction, 45 minutes of practical instruction and practice, and a 15-minute practical test. Then you must pass a practical assessment and a separate official Air Brakes knowledge test. Once you pass the knowledge test, you can get the Q endorsement.

    The Commercial Driver’s Guide and the Air Brake Manual – A Guide for Students are the official references for aspiring commercial drivers in the province. However, if you would like more intensive knowledge training on air brakes than you can get by reading the manuals or taking the required courses, we can help!

    This 20-question Alberta Air Brake practice test, the first of fourteen such tests we offer, covers the basics of commercial driving with air brakes in Alberta. All practice questions are based on the official Alberta references. If you get stuck on a question, ask our AI assistant to give you a hint, rephrase the question, or answer your own questions about commercial driving. If you still miss the question, the AI Assistant will immediately give you the correct answer and an explanation.

    Based on 2025 AB commercial driver's license manual
    Instant feedback
    List of questions (classic view)
    1. Should you pump (keep pressing and releasing) air brakes?
    2. It is important to keep compressed air as dry as possible because
    3. What does the low air pressure warning device warn you about?
    4. If the low air pressure warning signal comes on, what should you do?
    5. The effectiveness of the spring brakes for emergencies or parking
    6. During normal driving, what keeps the spring brakes released?
    7. Assuming good traction and constant vehicle weight, if you double your speed, your vehicle's braking distance will be
    8. If drum brakes overheat, the vehicle's stopping distance will increase. What is the reason for this?
    9. Air braking systems tend to react slower than hydraulic braking systems because
    10. While travelling downhill, you notice that each time you want to brake, you must press the brake pedal farther down than the last time to achieve the same braking force. What could be causing this?
    11. The maximum air pressure available for braking is determined by
    12. The foot (treadle) valve
    13. Which of the following can impair braking effectiveness?
    14. After you apply the service brakes, what happens to that compressed air?
    15. What does an alcohol evaporator do?
    16. Which of the following is NOT a type of auxiliary retarder?
    17. You're driving a vehicle equipped with a dual air brake system. The low air pressure warning signal comes on, but one system still has normal pressure. What should you do?
    18. How should you test a tractor-trailer's low air pressure warning signal?
    19. An application pressure gauge shows the air pressure
    20. All vehicles equipped with air brakes must have
    21. What is the colour coding that is often used for the supply and service lines to the trailer?

    FREE AB Air Brake Practice Test 1

    Pass with Premium, Guaranteed

    Before you may obtain a commercial driver’s licence of any class in Alberta, you must pass a written knowledge test and a practical test. The knowledge test is a multiple-choice test. The test takes about 30 minutes, and you must score at least 80% to pass. The questions on the knowledge test partly depend on which class of commercial licence you’re applying for. (As you would expect, the Class 1 knowledge test may have questions on cargo management, and the Class 2 test may have questions on passenger management and safety.)

    For a Class 1 or Class 2 licence, you’re also required to complete Mandatory Entry-Level Training (MELT). The MELT course will take about 113 hours for Class 1 or 50 hours for Class 2. It includes classroom instruction, yard training (pre-trip inspections and basic maneuvers), and behind-the-wheel driving.

    Nearly all large commercial vehicles (including Class 1 semi-trucks and Class 2 full-size buses) are equipped with air brakes. To be qualified to operate air brakes, you must obtain an Air Brakes (“Q”) endorsement on your commercial licence. An exception is Class 1, for which air brake qualification is a legal requirement. For either a Class 1 licence or the Q endorsement, you must complete an approved air brake course and answer knowledge test questions on air brakes. The course includes 6½ hours of classroom instruction, 45 minutes of practical instruction and practice, and a 15-minute practical test. Then you must pass a practical assessment and a separate official Air Brakes knowledge test. Once you pass the knowledge test, you can get the Q endorsement.

    The Commercial Driver’s Guide and the Air Brake Manual – A Guide for Students are the official references for aspiring commercial drivers in the province. However, if you would like more intensive knowledge training on air brakes than you can get by reading the manuals or taking the required courses, we can help!

    This 20-question Alberta Air Brake practice test, the first of fourteen such tests we offer, covers the basics of commercial driving with air brakes in Alberta. All practice questions are based on the official Alberta references. If you get stuck on a question, ask our AI assistant to give you a hint, rephrase the question, or answer your own questions about commercial driving. If you still miss the question, the AI Assistant will immediately give you the correct answer and an explanation.

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