Final answer:
Disc brakes are more resistant to heat fade than drum brakes due to their design and construction, which allows for better heat dissipation, frictional cooling, and a self-adjusting feature.
Step-by-step explanation:
Disc brakes are more resistant to heat fade compared to drum brakes due to their design and construction.
- Heat Dissipation: Disc brakes have a larger surface area exposed to the air, allowing for better heat dissipation. The rotating disc allows the heat to be quickly carried away from the braking system, preventing overheating.
- Frictional Cooling: When the brake pads clamp down on the disc, the friction between them generates heat. However, the disc design allows for better airflow, which helps in cooling down the brake components while the car is in motion.
- Self-Adjusting Feature: Disc brakes have a self-adjusting feature that keeps the clearance between the brake pads and disc constant. This reduces the chances of the brake pads dragging on the disc when not in use, preventing unnecessary friction and heat buildup.