Manitoba Airbrake Practice Exam

What is the primary effect of "brake fade" on vehicle performance?

1. Increased fuel consumption

2. Loss of braking effectiveness

3. Slowed acceleration

4. Shorter stopping distance

The correct answer is: Loss of braking effectiveness

The primary effect of brake fade on vehicle performance is a loss of braking effectiveness. Brake fade occurs when the braking system overheats, which can happen due to prolonged or excessive braking. As the brakes heat up, the friction material can become less effective at generating the necessary friction to slow the vehicle down. This results in a significant decline in the ability to stop the vehicle, which can lead to dangerous situations, especially in emergency scenarios or when descending steep grades. Understanding this phenomenon is crucial for drivers, particularly those operating heavy vehicles or those who frequently engage in stop-and-go driving. Recognizing the signs of brake fade, such as a spongy brake pedal or a distinct change in brake feel, allows a driver to adjust their braking technique or pull over to allow the brakes to cool. Other options, while they may relate to vehicle performance, do not accurately describe the primary impact of brake fade. Increased fuel consumption, for instance, can be a result of various factors related to driving habits but is not directly caused by brake fade. Similarly, while brake fade can lead to slower acceleration indirectly by creating a perception of insecurity in braking, it does not directly affect acceleration. Lastly, brake fade leads to longer stopping distances rather than shorter ones, countering