Practice question

What is a "roll-away" test after coupling a trailer?

  1. Driving at high speed immediately
  2. Applying the trailer park brake, then gently pulling forward against it to confirm the coupling is secure before releasing the park brake
  3. Reversing at speed into the trailer
  4. Disconnecting air lines to test pressure

Answer: B — Applying the trailer park brake, then gently pulling forward against it to confirm the coupling is secure before releasing the park brake

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