Which mechanical transmission system uses belts and pulleys?

In a mechanical transmission system, the belt drive system is specifically designed to use belts and pulleys to transmit power from one component to another. This system effectively transfers rotational motion and can efficiently connect non-adjacent shafts, allowing for flexibility in the design and placement of machinery and components.

Belt drive systems are particularly advantageous due to their ability to dampen shock loads, reduce noise, and provide a smooth transfer of power. The belts can be made of various materials, depending on the application, while the pulleys serve to guide and tension the belts properly. This arrangement makes the belt drive system versatile and widely used in numerous applications, including automotive engines and industrial machinery.

In contrast, other systems like gear drive, chain drive, and screw drive employ different mechanical principles and components, such as gears, chains, or lead screws, and do not involve belts and pulleys in their operation. This distinction is what makes the belt drive system the correct choice for this question.