Which component acts as the prime mover of wastewater in a centrifugal type pump?

Which component acts as the prime mover of wastewater in a centrifugal type pump?

• A. Drive Shaft
• B. Impeller
• C. Volute
• D. Check Valve

Answer: (B)

In a centrifugal pump, the impeller is the part that actually drives the wastewater. Its rotating blades impart velocity to the liquid, throwing it outward and increasing both its speed and pressure, which pushes the wastewater through the pump and into the discharge line. The drive shaft simply transmits mechanical power from the motor to the impeller; the volute is the casing that directs flow and helps convert velocity to pressure; the check valve prevents backflow. So the impeller is the component that directly acts on the liquid to set it in motion, making it the best answer.

In a centrifugal pump, the impeller is the part that actually drives the wastewater. Its rotating blades impart velocity to the liquid, throwing it outward and increasing both its speed and pressure, which pushes the wastewater through the pump and into the discharge line. The drive shaft simply transmits mechanical power from the motor to the impeller; the volute is the casing that directs flow and helps convert velocity to pressure; the check valve prevents backflow. So the impeller is the component that directly acts on the liquid to set it in motion, making it the best answer.