The description 'A pump having a turbine and motor that can be submerged without damage' describes which pump type?

• A. Piston Pump
• B. Centrifugal Pump
• C. Submersible Pump
• D. Diaphragm Pump

Answer: (C)

Submersible pumps are built to operate while fully submerged. The motor and the pump (often arranged with turbine/impeller stages) are enclosed in a waterproof housing, so water cannot reach and damage electrical components. This design allows the unit to be placed directly in water—such as in wells, basins, or sump pits—and run without priming or air leaks. Cooling is often achieved through the surrounding water, and the sealed construction protects the electrical parts from moisture.

That combination of a turbine-style pumping mechanism and a sealed, submerged motor is what makes the description a submersible pump. Other pump types, like piston, centrifugal (surface), or diaphragm pumps, are not designed to be submerged with their motor exposed to water, and thus don’t fit the description as well.