Practice question

Applying the brake pedal causes air pressure to activate an electric switch and:

  1. Turn off the brake lights.
  2. Turn on the low pressure warning light.
  3. Turn on the brake lights.
  4. Turn off the low pressure warning light.

Answer: C — Turn on the brake lights.

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

Practice more: Texas CDL Air Brakes Test 2 →