Utah CDL General Knowledge Practice Test 2025 – Complete All-in-One Guide for Exam Success!

Brake "fade" is primarily caused by brakes getting very hot. When brakes are applied, they generate friction, which produces heat. If the brakes are used continuously or with too much force, especially on descents or in stop-and-go traffic, the heat can build up to a point where the braking components, such as the brake pads and discs, begin to lose their effectiveness. This loss of braking power occurs because the extreme temperatures can cause the brake pads to become less effective at creating friction, and in some cases, it can lead to the brake fluid boiling.

Understanding this phenomenon is crucial for drivers, especially those operating commercial vehicles, as it emphasizes the importance of monitoring brake performance and managing driving conditions to prevent overheating. This knowledge also underscores the importance of regular maintenance checks to ensure that brake components are in good working condition, helping to avoid situations where brake fade might occur due to heat buildup from normal driving or excessive force.