What distinguishes surface pumps from submersible pumps?

Surface pumps are distinct from submersible pumps primarily due to their installation and operational characteristics. Surface pumps are located above ground and typically draw fluid from a source, such as a well or a reservoir, using suction. In contrast, submersible pumps are designed to operate while fully submerged in the fluid they are pumping, allowing them to push the fluid to the surface.

The advantages of surface pumps include easier maintenance, as they are more accessible compared to submersible pumps which may require more effort to retrieve for repairs or service. Additionally, since surface pumps rely on suction to draw liquid, they are generally better suited for applications where there is a sufficient supply of fluid to maintain this suction.

This characteristic of installation and functionality is crucial for understanding their appropriate applications, making option B the correct choice.