Commercial Driver's License

Category - Standard Driving

The braking power of retarders works on which of the following wheels?
  1. The front wheels
  2. The drive wheels
  3. The trailer or rear wheels
  4. All wheels
Explanation
Answer: B - The braking power of retarders only applies to the drive wheels. All other wheels are unaffected by the retarder. This is true regardless of the type of retarder that is installed in the vehicle.
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