Practice question

What should be done after parking an air-brake vehicle on a steep grade?

  1. Set the parking brakes and consider wheel chocks when conditions require extra protection
  2. Leave the vehicle in neutral with brakes released
  3. Drain all tanks until no brakes can release
  4. Use only the trailer hand valve as a parking brake

Answer: A — Set the parking brakes and consider wheel chocks when conditions require extra protection

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Practice more: Minnesota CDL Air Brakes Test Practice Questions - Minnesota Commercial Driver License (CDL) Air Brakes Knowledge Test Exam →