Practice question

How do you perform the tug test after coupling?

  1. Honk the horn and look for vibration
  2. With the trailer brakes set, gently pull the tractor forward in low gear
  3. Drive forward five feet and check the trailer height
  4. Pull the trailer air supply knob and listen for air loss

Answer: B — With the trailer brakes set, gently pull the tractor forward in low gear

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