A propeller in a pump primarily moves ______.

A propeller in a pump primarily moves ______.

• A. Pressure
• B. Volume
• C. Temperature
• D. Impurities

Answer: (B)

A pump impeller is designed to move the liquid itself, creating a flow. By imparting energy to the fluid, it governs how much liquid passes through the pump per unit time—the volume flow. The pressure rise (head) and changes in velocity are important effects, but the primary action is moving a volume of liquid through the system. Temperature changes or impurities aren’t what the impeller is intended to move, though those factors can be influenced indirectly by operating conditions. So the best answer is the volume of fluid moved.

A pump impeller is designed to move the liquid itself, creating a flow. By imparting energy to the fluid, it governs how much liquid passes through the pump per unit time—the volume flow. The pressure rise (head) and changes in velocity are important effects, but the primary action is moving a volume of liquid through the system. Temperature changes or impurities aren’t what the impeller is intended to move, though those factors can be influenced indirectly by operating conditions. So the best answer is the volume of fluid moved.