A hard brake pedal and longer stopping distance are most likely symptoms of a problem with which component?

• A. Master cylinder
• B. Brake Pads
• C. Power brake booster
• D. Disc rotor

Answer: (C)

Pedal effort and braking assist are what this item centers on. A hard brake pedal means you’re pushing against brakes that aren’t being aided by the booster, so you must apply much more force to get braking action. The power brake booster uses engine vacuum to multiply your input, making the pedal feel soft and easy to press; when the booster fails or loses vacuum, the pedal becomes stiff and braking may feel less effective, which can lead to a longer stopping distance. In contrast, a faulty master cylinder typically causes a soft or sinking pedal, worn brake pads reduce friction and increase stopping distance but don’t usually produce a hard pedal, and warped or damaged rotors affect feel or noise rather than causing a hard pedal.