Practice question

What is the first thing a driver should check before coupling a tractor unit to a semi-trailer?

  1. That the radio is turned off
  2. That the trailer is on a firm, level surface with the parking brake applied and the landing gear supports it
  3. That the trailer doors are open
  4. That the trailer is fully loaded

Answer: B — That the trailer is on a firm, level surface with the parking brake applied and the landing gear supports it

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