- Based on 2025 ON commercial driver's licence manual
- Updated for January 2025
Ontario Class B (Bus) Commercial Licence Practice Test 6
You’ve reached Practice Test 6! This time, we’re focusing on braking systems, including anti-lock brakes. In Ontario, Class B drivers are required to understand various braking systems as part of the license requirements. The test contains 50 questions, and you’ll need to score at least 80% to pass. Make sure you’re up-to-date with these key topics for the 2025 exam.
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
- Triple-checked for accuracy
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What you need to know
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
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What to expect on the official exam
50
questions
40
correct answers to pass
80
passing score
Our commitment to accuracy and quality in our practice tests
Explore our rigorous, multi-tiered verification process that ensures each question mirrors the official manual for unparalleled accuracy.
Written by Andrei Zakhareuski Updated over a week ago
At Tests.ca, we understand the importance of reliable and accurate practice tests to help you prepare for your driver's knowledge exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.
Here's an inside look at how we maintain the highest quality in our practice tests.
Content Creation and Verification Process
- Alignment with Official Driving Handbooks:
Every question we develop is based on the most recent version of each province's official driving manual. Our team regularly monitors each province's official website for the latest updates to ensure our practice tests are always aligned with the most current information. - Community Feedback Integration:
We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation. - Expert Content Creation:
Our in-house editor, Steven, who has extensive experience in driver education, crafts each question with precision. He conducts a thorough review of each question against the official manuals to ensure accuracy. - Rigorous Review Process:
Once Steven has finalized a set of questions, our team conducts a joint review session. This second level of scrutiny involves content accuracy, proofreading, and fact-checking to eliminate any errors. - User Feedback Mechanism:
After a question goes live on our site, we keep the lines of communication open. Each question features a feedback button, inviting users to report any issues or errors. This continuous feedback loop allows us to address and rectify any concerns promptly. - Responsive Updates:
In line with our commitment to accuracy, we quickly update our practice questions to reflect any changes in the provincial government manuals. Additionally, we update the free electronic copy of the state's driver's license manuals on our site, typically within a few days after the government publishes them.
Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your driver's knowledge exam.
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List of questions (classic view)
- When performing a lane change, you should stay within _______ of the posted speed limit.
- When driving a manual transmission vehicle, why should you run the engine in the highest gear range?
- Which of the following would NOT be a defect of a passenger seatback or the passenger-protection padding?
- Which of the following is NOT a benefit of properly warming up a vehicle?
- While the bus is stationary, where should a bus driver continue to look?
- A controlled railway crossing may have
- A light-rail transit (LRT) train may take up to ________ to stop in an emergency.
- A Slow-Moving Vehicle sign should be placed on any vehicle that travels no faster than
- A tire that is overinflated or underinflated can
- A tractor-trailer travelling at high speeds creates air turbulence in which of the following areas?
- A vehicle that is twice the weight of a car and is travelling at twice the speed of that car requires how much braking power to stop in the same distance?
- A white diamond marking in your lane indicates that
- A white X pavement marking in your lane means that
- What is a danger zone?
- Which dashboard gauge can help you decide when to upshift?
- Airbags are
- An engine governor is
- An octagonal (eight-sided) red sign is
- An oncoming vehicle at night has not dimmed its high-beam headlights. What should you do?
- Any defect or deficiency that you find on your bus must be
- At a railroad crossing, flashing red lights and ringing bells mean that
- At a stop sign, you must
- At an intersection with no traffic lights or traffic signs, you should
- At an intersection, the traffic light is red, but a police officer motions you to go through. What should you do?
- At what speed should you back up your vehicle?
- At which of the following engine speeds should you drive your vehicle?
- Before you drive your vehicle, you should
- Before you drive, you should
- Before you enter a curve, what gear should you select?
- Before you may turn left at an intersection, you must yield to
- Besides regular brake maintenance, who is responsible for ensuring that the brakes of a vehicle are working properly before the vehicle is driven?
- Cars A and B have arrived at this intersection at about the same time. Car A wants to turn left and Car B wants to go straight. Who has the right-of-way?
- Compounding the air brakes can
- Different-sized tires can
- Double-clutching is
- During a pre-hill inspection of a vehicle equipped with air brakes, you should do which of the following?
- During freezing conditions, you should exercise extreme caution when driving through which of the following?
- During your brake tests, you find that the brakes are not operating safely. What should you do?
- During your pre-trip inspection, you discover a defect that does not affect the safe operation of the vehicle. What should you do?
- Every written trip inspection report must include which of the following?
- For large commercial vehicles, which of the following are advantages of air brakes as compared with hydraulic brakes?
- For optimal safety, your head restraint should be positioned so that its centre is level with
- Funeral processions have right-of-way over you…?
- How can you downgrade from a commercial licence to a non-commercial licence?
- How can you ensure smooth braking of a large commercial vehicle?
- How can you tell how much air pressure is in the service reservoirs?
- How do you ease your vehicle into a smooth stop?
- How often should you look at your mirrors?
- How should you drive through a large amount of water on the roadway?
- How should you handle driving around a curve?
- Idling for longer than five minutes can