In disc brakes, what is the function of the caliper?

• A. To hold the brake fluid
• B. To press the brake pads against the rotor
• C. To support the braking system
• D. To apply pressure to the drum

Answer: (B)

The function of the caliper in disc brakes is to press the brake pads against the rotor. When the brakes are applied, hydraulic pressure is created within the caliper, causing it to contract and move the brake pads inward. This action creates the necessary friction between the pads and the rotor to slow down or stop the vehicle. The caliper plays a crucial role in converting hydraulic pressure into mechanical force, ensuring effective braking performance.

The other options, while related to brake system components, do not accurately describe the role of the caliper in disc braking systems. Holding brake fluid is a function of the master cylinder and the brake lines, supporting the braking system typically involves various components rather than just the caliper, and applying pressure to the drum pertains to drum brakes, not disc brakes, highlighting the specific nature of calipers in the disc brake function.