Michigan CDL - Air Brakes Practice Exam

Checking brake lining thickness is vital because it directly impacts the vehicle's ability to stop safely. Brake linings are designed with friction materials that wear down over time due to their constant interaction with the brake drums or rotors. Insufficient lining thickness can compromise braking efficiency, increasing stopping distances and posing a serious safety risk. If the linings are too worn, they may not create enough friction to effectively slow down or stop the vehicle, which can lead to accidents.

While maintaining the visual appeal of brakes, keeping brake drums in good condition, and complying with regulatory standards are important aspects of vehicle maintenance, they do not outweigh the fundamental necessity of ensuring brakes can perform their primary function—allowing the vehicle to stop safely. Therefore, monitoring brake lining thickness is essential for overall vehicle safety and performance.