Practice Quiz

Commercial Driver's License

Category - Inspections

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Which of the following is NOT true for vehicles with dual tires?
  1. Dual tires should not touch one another.
  2. Using mismatched tire sizes is okay on commercial vehicles.
  3. Valve stems should not be cracked or cut.
  4. Retread tires are not allowed on the front wheels of a bus.
Explanation
Answer: B - Vehicles that have dual tires have special requirements that drivers must know and understand. One of the more important things to know is that dual tires must not touch one another. This is a major cause of tire fires on the road. Commercial vehicles are not allowed to use mismatched tire sizes on any type of vehicle. Buses are not allowed to use retread tires as their front tires.
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