Arkansas Commercial Driver License (CDL) Practice Test

The correct answer is "fade." When brakes get too hot, especially after prolonged use, they can lose their effectiveness, a phenomenon known as brake fade. This occurs because the heat can cause the brake fluid to boil or it can reduce the friction between the brake pads and the braking surface. As a result, the driver will experience a decrease in braking performance, making it harder to stop the vehicle effectively. Understanding brake fade is crucial for commercial drivers, as it can lead to dangerous situations if not acknowledged. It typically happens during long descents or repeated braking, such as in heavy traffic, when the brakes are overused. The other issues, such as exploding, failing, or locking up, while they can be serious concerns for brakes, are not the common result of overheating. Instead, these issues may arise due to mechanical failure, lack of maintenance, or improper brake adjustment. Focusing on brake fade is important for preventing accidents and ensuring safety on the roadway.