Practice question

A driver is reviewing slippery road retarder rule. Which answer matches official New York DMV or FMCSA guidance?

  1. do not use the engine brake or speed retarder on slippery roads
  2. always use speed retarders on ice
  3. close trailer shut-offs before using retarders
  4. retarders restore traction on slippery roads

Answer: A — do not use the engine brake or speed retarder on slippery roads

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