Air Brake Practice Test

What is the status of brake fade in drum brakes?

1. It is a possible occurrence

2. It is not possible

3. It is beneficial

4. It is easily managed

The correct answer is: It is a possible occurrence

Brake fade is a phenomenon that can occur in drum brakes, particularly under conditions of heavy use or prolonged braking, such as on steep grades or in stop-and-go traffic. It happens when the brake components become excessively hot, causing a decrease in their effectiveness, resulting in a longer stopping distance. This reduction in braking power can lead to a dangerous situation if not anticipated or managed properly. The possibility of brake fade highlights the importance of understanding how brake systems operate under stress. Unlike disc brakes, which tend to dissipate heat more effectively, drum brakes can retain heat, increasing the likelihood of fade. Therefore, being aware that brake fade is a possible occurrence in drum brakes is crucial for any operator of vehicles equipped with such systems. Recognizing the symptoms of brake fade allows drivers to adjust their driving habits accordingly, such as giving the brakes time to cool down or using lower gears when descending hills.