A mechanical component that transmits power is known as what?

A mechanical component that transmits power is best identified as a transmission. This is because a transmission is specifically designed to transfer energy from one part of a machine to another, often converting speeds and torques to optimize the operation of the system. In vehicles, for instance, the transmission allows for the adjustment of power from the engine to the wheels, ensuring that the vehicle can operate effectively across different speeds and conditions.

In contrast, other options describe components that serve different primary functions. A generator converts mechanical energy into electrical energy but does not predominantly focus on power transmission. An actuator is a device that converts energy into motion but is not primarily focused on the transmission of power in the mechanical sense. A combustor is involved in the combustion process, typically in engines and industrial applications, but does not play a direct role in power transmission. Hence, a transmission is unequivocally the component that serves the purpose of transmitting power in mechanical systems.