What is a characteristic of a centrifugal pump?

A centrifugal pump is specifically designed to move fluids through the use of centrifugal force generated by rotating impellers. This design is key to how the pump operates. When the impeller spins, it imparts energy to the fluid, creating a high-velocity flow. The fluid enters the pump at the eye of the impeller and is pushed outward to the pump’s discharge. This action increases the kinetic energy of the liquid, allowing it to overcome resistance and move efficiently through pipelines and to various applications.

While some other options touch on various mechanical principles, they don't accurately describe fundamental characteristics of a centrifugal pump. For instance, there is no reliance on gravity for operation; instead, the pump actively forces fluid through mechanical energy. Additionally, centrifugal pumps are designed primarily for liquids rather than solid materials, making them unsuitable for applications involving solids without special adaptations. The principle of inertia is involved in many mechanical systems, but it is not the primary operating principle for a centrifugal pump. The focus on the impellers distinguishes this type of pump as a crucial element of its function.