2025 ON Commercial General Knowledge: Test 7

Driving a truck in Ontario requires specific skills and knowledge. Our 51-question practice test is designed to prepare you for the ON commercial driver's licence exam. Updated for 2025 and based on the ON commercial driver's guide, each question comes with instant feedback to improve your understanding. You must score at least 80% on the official test, and this practice version aims to help you achieve that. Ideal for first-time applicants, those renewing their licence, and drivers seeking additional endorsements. Good luck and drive safely!

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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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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)

Can Schedule 1 be used as a guide and reference during the daily inspection test?
Can the police stop any driver to conduct a drug test?
What aspect is examined during the backing skills test?
Which of the following is not part of the Class A or D road test?
What happens to commercial-class licence holders who fail to submit a satisfactory medical report periodically for their commercial licence?
What is the purpose of the daily inspection test during the road test?
How often are drivers under the age of 46 required to submit a medical report?
What does a broken yellow line indicate on the road?
Why are the exterior and interior portions of the daily inspection test administered using a random selection of testing items from schedule 1?
At what age does a driver with a class D licence have to pass a vision and knowledge test every five years to renew their licence?
If police suspect that your driving has been impaired by drugs, they can require you to provide which of the following samples?
What is not part of the Class A or D road test requirements?
What happens if a commercial driver has detected alcohol or a drug in their system?
Which of these is illegal concerning your driver's licence?
What should you do when you approach a flashing yellow light?
What happens to your record after receiving a traffic violation in Ontario? Do you receive or lose demerit points?
How frequently are Drivers aged 46 to 64 required to submit a medical report?
What action should you take in the event of an electrical power loss when traffic lights at intersections are not working?
If you refuse to provide a breath sample or to perform the physical co-ordination tests, what consequence will you face?
What is the colour of the traffic light for oncoming traffic when you have a flashing green light or a left-pointing green arrow and a green light?
Once they reach 80 years old, how often must a driver with a class D licence submit a medical report?
What is a traffic beacon?
What item is not assessed during the daily inspection test?
When there is damage or breakage in the attachment for a mirror or other glass items, what is this classified as?
During the driver's test, how many times will you be expected to perform a backing maneuver?
You find air is coming out of the service line during a service brake application with the trailer supply valve closed. What type of defect is this?
In the case of a Class D vehicle, a major defect is identified when the air pressure drops more than what prescribed limit in a single minute?
Which of the following actions does NOT help you conserve fuel and improve fuel economy?
When inspecting hydraulic brakes, you should check all of the following EXCEPT
How would the absence of a fuel cap be reported?
In the inspection of the frame and cargo body, which of these is considered a minor defect?
When inspecting the fuel system, you do not have to check
Which statement is incorrect? It is considered a minor defect when any suspension fastener is...
When air pressure takes longer than two minutes to build up to the prescribed psi range, this is considered what type of defect?
Which of these is not on the inspection checklist when examining windshield wipers and washers?
When a wiper blade is damaged, missing or is unable to clear the driver's view on the windshield, how is this issue classified during inspection?
For a Class A vehicle, the air pressure's drop in one minute exceeding a certain limit is classified as which kind of defect?
In operating new diesel engines, approximately at what rpm range should you execute downshifts and upshifts?
What type of violation or defect does it represent when the pushrod stroke of any brake extends beyond its limit?
During a vehicle inspection, are you supposed to listen for an audible air leak?
When the vehicle's low-air warning either fails to activate or is triggered before air pressure drops below 55 psi, what type of defect does this constitute?
If visual evidence indicates a possible future failure of a wheel, hub or bearing, this situation is classified as what during inspections?
What could be the potential consequence if a wheel seal is leaking?
Which of the following is NOT considered a benefit of progressive shifting?
If a vehicle's seat belt or tether belt is not secure, missing or malfunctioning, how is this classified during inspections?
While examining the hydraulic brake system, how would you classify the brake fluid level being below the manufacturer's recommended minimum level?
Which of the following statements is false? It is a major defect when any part of the leaf spring or any suspension part is...
How long should you allow your vehicle to warm up before you start driving if the temperature is below 0 degrees Celsius?
What must you demonstrate during the uncoupling and coupling portion of the driver's test?
At what level should the air pressure be to measure the applied pushrod stroke?
The presence of polished or shiny areas at the flanges or clamps of spoke wheels indicates that