Practice question

Which statement is correct about slippery road retarder rule for the New York CDL doubles/triples test?

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

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

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