Final answer:
A centrifugal pump is considered a dynamic pump because the volume of liquid discharged changes with the pressure head. Fluid enters the pump and is accelerated by the rotating impeller, moving outward and exiting through a discharge outlet. The pressure head determines the velocity and volume of the discharged fluid.
Step-by-step explanation:
A centrifugal pump is considered to be a type of dynamic pump because the volume of liquid discharged from the pump changes whenever the pressure head changes. In a centrifugal pump, fluid enters the pump through a central inlet or eye and is accelerated by the rotating impeller.
As the fluid is accelerated, centrifugal force causes it to move outward and exit the pump through a discharge outlet. The pressure head of the pump determines the velocity and volume of the fluid being discharged.