Practice question

Why is it necessary to adjust air brakes regularly?

  1. To reduce the noise level of the brakes.
  2. To maintain optimal braking performance and prevent excessive wear.
  3. To increase the braking speed.
  4. To reduce fuel consumption.

Answer: B — To maintain optimal braking performance and prevent excessive wear.

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

Practice more: CDL Air Brakes Endorsement Test →