Red Seal Heavy Duty Equipment Technician Practice Exam

What are common signs that brakes are wearing in heavy-duty vehicles?

1. High fuel efficiency

2. Squeaking noises and reduced braking efficiency

3. The vehicle accelerating faster

4. Even performance in all brake systems

The correct answer is: Squeaking noises and reduced braking efficiency

Brakes are a critical component of heavy-duty vehicles, and understanding their wear is vital for safe operation. The presence of squeaking noises is a well-known indicator that brake components, such as brake pads, are nearing the end of their service life. This sound often arises when the brake material has worn down significantly, and a metal indicator contacts the brake rotor, signaling that replacement is necessary. Reduced braking efficiency is another crucial sign; as brake pads wear, they lose their ability to create adequate friction, leading to longer stopping distances and potentially dangerous situations. Thus, when both squeaking and a noticeable decline in braking performance occur, it is essential to assess and likely replace the braking system components to ensure vehicle safety and reliability.