The basic function of the centrifugal pump impeller is to __________.

Correct Answer: Option C — directly increase the velocity of the liquid being pumped

Centrifugal pump impellers function by imparting centrifugal force to the fluid. As the impeller rotates, it accelerates the liquid, directly increasing its velocity. This kinetic energy is subsequently converted into pressure energy as the fluid moves through the pump casing and volute toward the discharge nozzle.