A base plate is used when there is a driver and driven unit of machines.

A base plate is indeed used when there is a driver and driven unit of machines, providing stability and support for the equipment. The purpose of a base plate is to distribute the weight and forces exerted by the machinery evenly onto the floor or foundation, which helps to prevent excess vibration and movement. This is particularly crucial in applications where precise alignment and proper functioning of the driven unit are necessary.

In cases involving a driver (like a motor) and a driven unit (like a pump or generator), the base plate ensures that both components are securely mounted and can operate cohesively. Proper alignment achieved through the base plate is essential to enhance the efficiency and longevity of the machinery, minimizing wear and tear on rotating parts.

Choosing to use a base plate also allows for easier maintenance and installation of the machinery, as it facilitates access to the components for repair or adjustment. Thus, the utilization of a base plate is an industry-standard practice when dealing with paired driving and driven machines, making the statement true.