Which component increases the force you apply to the brake pedal, aiding braking?

• A. Brake pad
• B. Brake booster
• C. Master cylinder
• D. Caliper

Answer: (B)

The brake booster multiplies the force you apply to the brake pedal. It uses engine vacuum (or an electric pump in some systems) to push extra force into the master cylinder as you press the pedal. That means you don’t have to push as hard to achieve the same hydraulic pressure in the brake lines, making braking easier and more responsive. The booster works with a diaphragm and valves to create a pressure difference that supplements your push on the pedal.

Brake pads and calipers are the parts that actually grip and slow the wheels, but they rely on the hydraulic pressure generated by the master cylinder, which is helped by the booster. The master cylinder converts your pedal input and the booster’s assist into hydraulic pressure that actuates the brakes.