What components in a drum brake system press against the brake drum to create friction?

The correct answer is that the brake shoes are the components in a drum brake system that press against the brake drum to create friction. When the brake pedal is engaged, hydraulic pressure is applied to the brake wheel cylinder, which pushes the brake shoes outward against the inner surface of the brake drum. This contact between the brake shoes and the drum generates the necessary friction to slow down or stop the vehicle.

Brake drums are merely the circular components that rotate along with the wheel and provide a surface for the brake shoes to press against. Brake linings, on the other hand, are the material attached to the brake shoes that actually make contact with the brake drum. While brake pads are vital in disc brake systems, they do not apply to drum brake systems as they are not present in that setup.

Understanding the role of each component is crucial for recognizing how the braking system operates as a whole.