Manitoba Airbrake Practice Exam

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What may occur as brakes heat up, reducing their effectiveness?

Brake improvement
Brake expansion
Brake fade
Brake stabilization

The correct answer is: Brake fade

As brakes heat up, the brake pads and rotors become hotter, causing the brake fluid to boil and produce gas bubbles. This creates a layer of gas between the pads and rotors, reducing the friction and causing brake fade. This results in a decrease in braking power and can lead to longer stopping distances and increased risk of accidents. Option A, brake improvement, is incorrect because brakes do not improve as they heat up. Option B, brake expansion, is also incorrect because while the heat causes the components to expand, it does not improve the overall effectiveness of the brakes. Option D, brake stabilization, is incorrect because the heating of brakes does not lead to stabilization, but rather a decrease in effectiveness.