Which of the following is a part of a centrifugal pump?

A centrifugal pump is designed to move fluid through the rotation of an impeller, which adds velocity to the fluid, and then the volute, which converts that velocity into pressure to move the fluid efficiently through the system.

The impeller is crucial as it is the rotating component that provides energy to the fluid and creates the necessary flow. It consists of blades that propel the fluid outward from the center.

On the other hand, a volute is a spiral-shaped casing surrounding the impeller. It collects the fluid exiting the impeller and gradually expands in area to convert kinetic energy into pressure, allowing the fluid to be directed into the piping system effectively.

Since both components play critical roles in the functioning of a centrifugal pump, their presence in the system is essential for efficient fluid movement. Hence, the correct understanding of a centrifugal pump encompasses both the impeller and the volute, leading to the conclusion that the best answer includes both components.