What type of pumps does the impeller-driven category encompass?

The impeller-driven category includes both surface and submersible pumps due to the design and operational principles that define these types of pumps. Impeller-driven pumps utilize a rotating component, or impeller, to move fluid. This mechanism is common in both surface pumps, which are typically found above the water level and draw fluid from a source, and submersible pumps, which are designed to be submerged in the fluid they are pumping.

Surface pumps are often used in applications such as irrigation or drainage, where they pull water from a well or reservoir. Submersible pumps are commonly employed in applications like sewage and well pumping where they are placed directly in the fluid. The versatility of impeller-driven technology allows for effective fluid movement in various environments and conditions, thereby encompassing both categories of pumps.

The other options do not fully represent the scope of impeller-driven pumps. For instance, stating that it includes only surface or only submersible pumps restricts the understanding of where impeller-driven technology can be applied. Furthermore, identifying the category as only centrifugal pumps would exclude other types of impeller-driven pumps that may not fit this specific classification, thus limiting the comprehensive nature of the impeller-driven category.