Practice question

Which choice is safest and most consistent with Minnesota/FMCSA guidance on hand valve skid risk?

  1. Back or turn faster so the trailer responds sooner
  2. Use the trailer hand valve for normal stopping
  3. Skip the visual check if the tug test feels normal
  4. do not use the trailer hand valve to straighten a jackknife

Answer: D — do not use the trailer hand valve to straighten a jackknife

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