Practice question

How should you test the low pressure warning signal?

  1. Engage and disable the parking brake.
  2. Rapidly press and release the brake pedal.
  3. Open the rear shut-off valves.
  4. Uncouple and recouple all glad hands.

Answer: B — Rapidly press and release the brake pedal.

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

Practice more: District Of Columbia CDL Class A Knowledge Test 2 →