- Based on 2025 YT commercial driver's licence manual
- Updated for April 2025
FREE YT Air Brake Practice Test 1
Yukon is a remote and rugged land, where winter conditions can be extreme. You might be driving on steep grades and tight switchbacks on the Klondike Highway (Highway 2) near Dawson City and Pelly Crossing. Or driving in avalanche zones or on dangerous downgrades on the Haines Highway (Highway 3) near the Chilkat Pass. Or driving on the Robert Campbell Highway (Highway 4), a remote road with loose gravel and steep grades. Well-performing brakes are critical for safety in such situations.
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.
There are two ways you can get the air brake endorsement in Yukon. One way is to complete an approved Air Brake course. Once you’ve done so, your local Motor Vehicle Office will add the endorsement to your commercial licence.
The other way is to pass a knowledge test on air brakes and then pass an air brake practical test. Once you’ve done so, your local Motor Vehicle Office will add the endorsement to your commercial licence. If you wish, you can take the air brake practical test and the driving test for your commercial licence in the same session.
To prepare for your driving test, you’ll practice commercial driving with your commercial learner’s permit. In Yukon, Mandatory Entry-Level Training (MELT) is not currently required for any class of licence.
In Yukon, the official commercial driver’s reference for air brakes is the Yukon Air Brake Manual. But Air Brakes is a challenging subject to master just by reading about it. We offer nine practice tests to reinforce and enhance your knowledge of the subject through intensive repetition.
This Yukon Air Brake practice test is the first of those practice tests. It’s up to date as of April 2025 and based on the official Yukon Air Brake Manual. Our AI Assistant can help you with any question by supplying a hint or rephrasing the question. You can even ask your own questions about any aspect of commercial driving. If you still miss the question, the AI Assistant will immediately show you the correct answer and an explanation.
Please try our other eight Yukon Air Brake practice tests too!
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
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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?
- Wedge brakes are designed to be
- Where are the air brake chambers located?
- What does an ABS system do?
- When you are going at twice the speed, your service brakes will need to work _________ to stop your vehicle.
- Which of these significantly decreases the braking force produced at the wheel?
- Which type of trailer can be towed before the service tanks are full?
- In determining how well your air brake system works, which is NOT a significant factor?
- In large commercial vehicles, most air brake systems use automatic valves to
- Where are a vehicle's air tanks located?
- What is the "cut-in" level?
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