Georgia Commercial Driver License Practice Test

What does brake fade cause in the brake lining?

1. It increases friction

2. It reduces brake friction

3. It stops chemical changes

4. It maintains brake effectiveness

The correct answer is: It reduces brake friction

Brake fade occurs when the brake system overheats, typically due to prolonged and excessive use, such as during heavy braking. This overheating affects the brake lining material, leading to a reduction in its ability to create friction against the brake drum or rotor. As a result, the effectiveness of the braking system diminishes, resulting in longer stopping distances and a feeling of reduced responsiveness when the brake pedal is applied. When brake fade happens, the material properties of the brake lining can change, leading to a loss of grip. Instead of increasing friction, as would be necessary to maintain effective braking, the heat can cause gas buildup and material degradation, ultimately leading to a reduction of usable friction surface. Therefore, it is critical for drivers, especially those with commercial driver's licenses, to understand the causes and effects of brake fade to ensure safety and effective vehicle operation.