What does the term 'drum brake' refer to?

• A. A type of brake that uses external pads
• B. A type of brake that uses friction on the outer surface of a moving drum
• C. A type of brake that uses friction on the inner surface of a rotating drum
• D. A type of brake that is always used in conjunction with disc brakes

Answer: (C)

The term 'drum brake' specifically refers to a braking system that utilizes friction on the inner surface of a rotating drum to slow down or stop the vehicle. In this system, brake shoes are positioned inside the drum, and when the brake pedal is applied, these shoes are pressed outward against the drum's inner surface. This contact creates friction, which generates the necessary force to reduce the wheel speed.

Drum brakes are commonly used in many vehicles, especially in rear wheel applications, due to their effectiveness in providing strong braking power. Additionally, they are often appreciated for their ability to function well in various environmental conditions. The design of drum brakes allows for consistent performance, which is vital for safe driving experiences.

The other options reference different brake technologies or concepts that don’t align with the definition of a drum brake.