Practice question

What is the likely problem if the safety valve releases air around 150 psi?

  1. The governor may not be cutting out correctly
  2. The parking brake is adjusted perfectly
  3. The tanks are empty
  4. The ABS is shortening every stop

Answer: A — The governor may not be cutting out correctly

The correct answer is shown above. Try the full quiz for additional practice.

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