Practice question

On the Nebraska CDL combination test, what is the correct order to disconnect the air lines and electrical cord when uncoupling?

  1. Disconnect first, then secure them on dummy couplers or hangers
  2. Leave them on the trailer; the next driver will move them
  3. Cut them with a knife if they are stuck
  4. Disconnect only the red line

Answer: A — Disconnect first, then secure them on dummy couplers or hangers

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