Practice question

What should happen if the air pressure in the air brake system tanks falls below 60 psi?

  1. A warning light should come on.
  2. Lights should flash on the outside of the vehicle.
  3. A message should appear on the control panel.
  4. The vehicle should stop.

Answer: A — A warning light should come on.

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Practice more: North Dakota CDL Air Brakes Test 1 →