Practice Quiz

Commercial Driver's License

Category - Difficult Driving

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When inspecting the front tires for winter driving, tread depth on steering tires should be at least:
  1. 1/32 inch
  2. 2/32 inch
  3. 3/32 inch
  4. 4/32 inch
Explanation
Answer: D - When inspecting the front tires of a commercial vehicle, drivers should find at least 4/32 inch of tread in all of the major grooves. This depth is required in order for the front tires to maintain traction. Loss of traction can result in the driver not being able to steer the vehicle. Tires that do not have enough tread should be replaced before leaving on the trip. All other tires on the vehicle should have at least 2/32 inch of tread.
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