Class 4 Commercial Driver Practice · Question
What is the minimum legal tread depth for the front tires of a commercial vehicle in most provinces?
The tread depth on the front tires of a commercial vehicle is critical for steering and must generally be at least 3mm (though some provinces vary between 1.6mm
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Question: What is the minimum legal tread depth for the front tires of a commercial vehicle in most provinces?
Answer options:
- 1.6 mm (2/32 inch) ✅ 3.0 mm (4/32 inch)
- 5.0 mm (6/32 inch)
- 1.0 mm (1/32 inch)
Correct answer: 3.0 mm (4/32 inch)
Explanation: The tread depth on the front tires of a commercial vehicle is critical for steering and must generally be at least 3mm (though some provinces vary between 1.6mm and 3mm, 3mm is the higher commercial standard). options choose the most common Canadian standard.
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Question explanations
- What should you do if your accelerator pedal sticks while you are driving?
- What type of information should a Class 4 driver generally NOT include in their daily trip records or logbook
- When operating a taxi or small bus, when are you required to ensure passengers are using seatbelts?
- What is the correct procedure for a small bus driver approaching an uncontrolled railway crossing?
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