Practice question

What should you verify before releasing the fifth wheel slide locking pins to adjust fifth wheel position?

  1. Trailer landing gear is raised and vehicle is traveling at 50 km/h
  2. Ensure trailer brakes are locked, ground is level, locking pins are fully retracted, and inspect that pins fully re-engage in rail slots after movement
  3. Ensure fuel tank is empty
  4. Disconnect all air brake lines first

Answer: B — Ensure trailer brakes are locked, ground is level, locking pins are fully retracted, and inspect that pins fully re-engage in rail slots after movement

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