Which of the following is a pump type?

• A. Centrifugal
• B. Gear Pump
• C. Jet Pump
• D. Submersible Grinder Pump

Answer: (A)

Understanding pump types comes down to how the pump moves the liquid. A centrifugal pump uses an impeller to fling fluid outward, creating velocity and then converting that to pressure. This dynamic action makes it the most common and versatile choice for wastewater systems because it can move large volumes of water and adapt to varying system pressures with simple maintenance and lower cost.

Gear pumps, by contrast, are positive-displacement pumps that deliver a precise amount per rotation, which isn’t ideal for the fluctuating flows typical in sewer systems. Jet pumps rely on a jet of fluid to draw in more liquid and are less common for general wastewater pumping. Submersible grinder pumps are specialized devices designed to grind solids before pumping, a specific application rather than a broad pump type. Because centrifugal pumps embody the broad, standard pump type used for moving wastewater efficiently, they are the best answer here.