Practice question

What does brake lag mean in an air brake system?

  1. The time it takes air to travel through the system and apply the brakes after the pedal is pressed
  2. A low tire tread condition
  3. An ABS fault code
  4. A governor that cuts out too early

Answer: A — The time it takes air to travel through the system and apply the brakes after the pedal is pressed

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

Practice more: Illinois CDL Air Brakes Practice Questions - Illinois CDL Air Brakes Knowledge Test Exam →