- Based on 2025 SK commercial driver's licence manual
- Updated for April 2025
FREE SK Air Brake Practice Test 1
Driving in Saskatchewan is typically characterized by open landscapes and long, straight roads, except in rural areas. Still, winter driving in the province can be tough, with heavy snowfalls and icy roads. According to an analysis by the RCMP, the two major roads with the most fatalities in Saskatchewan from 2019 to 2024 were Highway 1 (the Trans-Canada Highway) and Highway 16 (the Yellowhead Highway), both major commercial routes. On Highway 1, drivers can encounter ice and blowing snow in winter and high winds powerful enough to push trucks off the road. On Highway 16, drivers must be alert for sharp curves, winter whiteouts, and rough pavement. In such situations, well-performing brakes are critical for safety.
To upgrade your Class 5 licence to a commercial licence, you must pass a vision test and submit a medical report form completed by a physician. You must also pass several knowledge tests: a basic knowledge exam on the rules of the road, a sign exam on the meanings of various traffic signs, and a knowledge exam about the commercial class to which you’re upgrading. Saskatchewan calls this exam the “endorsement exam” for that commercial class. Passing the endorsement exam will allow you to practice driving that class of vehicle under supervision. For Class 1, you must also complete Mandatory Entry-Level Training (MELT). Once you feel ready, you may take the trip inspection and road tests in a vehicle appropriate for the class of commercial licence you’re applying for.
To drive commercial vehicles with air brakes, you must obtain an air brake endorsement on your Class 1, 2, or 3 commercial driver’s licence. The air brake endorsement is mandatory for Class 1 and unavailable for Class 4.
For an air brake endorsement, you must pass the Air Brake knowledge test, based on the official SGI Air Brake Manual. Next, you must also pass the Air Brake practical test, in which you will show an examiner how an air brake system works and how to adjust a manual slack adjuster. You will also explain (but not show) how to adjust an automatic slack adjuster.
This Saskatchewan Air Brake practice test has 25 questions. It is up to date as of April 2025 and based on the official SGI Air Brake Manual. If you’re stumped by a practice question, you can ask the AI Assistant to rephrase it or give you a hint. You can even ask your own questions. If you still miss the question, the AI Assistant will show you the correct answer and an explanation.
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
- Triple-checked for accuracy
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More resources
- Should you pump (keep pressing and releasing) air brakes?
- It is important to keep compressed air as dry as possible because
- What does the low air pressure warning device warn you about?
- If the low air pressure warning signal comes on, what should you do?
- The effectiveness of the spring brakes for emergencies or parking
- During normal driving, what keeps the spring brakes released?
- Assuming good traction and constant vehicle weight, if you double your speed, your vehicle's braking distance will be
- If drum brakes overheat, the vehicle's stopping distance will increase. What is the reason for this?
- Air braking systems tend to react slower than hydraulic braking systems because
- 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?
- The maximum air pressure available for braking is determined by
- The foot (treadle) valve
- Which of the following can impair braking effectiveness?
- After you apply the service brakes, what happens to that compressed air?
- What does an alcohol evaporator do?
- When you test the system air-loss rate, the maximum acceptable leakage rates per minute after the initial drop are
- 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?
- How should you test your vehicle's low air pressure warning signal?
- An application pressure gauge shows the air pressure
- All vehicles equipped with air brakes must have
- What is the colour coding that is often used for the supply and service lines to the trailer?
- The hand valve of a tractor-trailer
- In a vehicle equipped with air brakes, what does the governor control?
- Polarized gladhands on a tractor
- ln vehicles with three dash-mounted push-pull valve knobs, how are the valve knobs usually coloured?
- Which of the following are major components of the air supply circuit?
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