Practice question

When should a CMV driver check mirrors?

  1. Regularly, before lane changes, turns, merges, and after completing maneuvers
  2. Only before starting the engine
  3. Only when backing
  4. Only when traffic is light

Answer: A — Regularly, before lane changes, turns, merges, and after completing maneuvers

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Practice more: DC CDL General Knowledge Practice Questions - District of Columbia Commercial Driver License General Knowledge Test Exam →