- Based on 2025 ON commercial driver's licence manual
- Updated for January 2025
Ontario Class B (Bus) Commercial Licence Practice Test 5
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
- Triple-checked for accuracy
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correct answers to pass
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More resources
- Exhaust gases entering the vehicle's cabin due to an exhaust-system leak constitutes which sort of defect?
- For air bags, each of these counts as a major defect EXCEPT
- What sort of defect is it when a tire is rubbing against another tire or vehicle component?
- If a window or door fails to close securely, what type of defect does this constitute?
- When there are visible signs warning of a possible wheel, hub, or bearing failure, what sort of defect is it considered?
- When the brake fluid level falls below the manufacturer's prescribed minimum level, what type of defect is it deemed?
- Is it considered a defect if a compartment door is either missing or insecure?
- What sort of defect is it when any part of the vehicle's body is either insecure or missing?
- What can a loss of brake fluid cause?
- If the required alarm for the emergency exits is not working and there are passengers present, what type of defect is this considered?
- How should you inspect the level of hub oil?
- If you suspect a tire leak but you can't feel it or hear it, does it count as a defect?
- A loose U-bolt in the vehicle's suspension counts as what kind of defect?
- In relation to a frame component, which of the following is NOT considered a major defect?
- If you notice an exhaust leak, what type of defect is it?
- What sort of defect is it when a lamp is either missing or not working?
- When the hydraulic brake reservoir is less than a quarter full, what type of defect is it deemed?
- If there is noticeable damage to the tread or sidewall of a tire, what sort of defect does it constitute?
- When the attachments for a needed mirror or another piece of glass are damaged, what kind of defect is it?
- What type of defect is it when the low air-warning either fails to operate or operates prematurely before air pressure drops below 55 psi?
- If an air leak is discernible in the air-suspension system, what kind of defect does it constitute?
- In the inspection of any wheel, rim, or part used to attach the wheel or rim, which of the following are considered major defects?
- What happens when any door doesn't secure appropriately when passengers are present?
- Which of the following is not a minor defect with regards to suspension fasteners?
- What type of defect is it when any spring has a single broken leaf?
- Is it mandatory to keep the first aid kit replenished at all times?
- Which one is not qualified as a defect relating to the Emergency equipment you have in the bus?
- What may happen if your licence plate is not clearly visible?
- When a passenger seat is occupied and the seat is insecure, what type of defect is it?
- When would a mirror's glass surface be considered as having a major defect?
- When inspecting the windshield, make sure that
- Why is it important to maintain enough distance between you and the vehicle ahead?
- At what pace should the vehicle backing always be done?
- You're driving a school bus. Before driving away from a bus stop, what should you confirm after passengers have boarded the bus?
- Is it necessary to inspect the bus steps and floor?
- What should be done if the student safety crossing arm is not present?
- What is the severity of the defect when the stanchion padding is damaged?
- After clearing an intersection, why should mirrors be checked?
- Which is NOT a valid reason that you should turn off your engine when you stop for any length of time?
- Which is NOT a minor defect related to the stop arm of a Class B and E vehicle?
- At about what rpm should you practice progressive gear shifting?
- In normal weather conditions, for how long should you typically let your vehicle warm up?
- Which of the following is NOT considered a defect if found on the wiper blade?
- Which following location is suitable for making a lane change?
- Where should you slow your vehicle while exiting an expressway?
- Why should you not take a long time to perform a lane change?
- Why should you release the accelerator when going downhill?
- What type of defect is a damaged seat that won't stay in the required position for driving?
- When must transmission shifts be performed while navigating an intersection?
- How long should you warm up your vehicle if the temperature is below 0 degrees Celsius?