Practice question

If the spring brakes are activated, you should never:

  1. Push down the brake pedal.
  2. Open the hood.
  3. Release air from the air storage tanks.
  4. Open the door to the cab.

Answer: A — Push down the brake pedal.

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

Practice more: Colorado CDL Air Brakes Test 2 →