A fixed volume of liquid is discharged by a centrifugal pump. Is this statement true or false?

The statement that a fixed volume of liquid is discharged by a centrifugal pump is false. Centrifugal pumps are designed to increase the velocity of a fluid, causing it to move through the pump and into the discharge piping. The actual volume of liquid discharged by a centrifugal pump depends on various factors, including the pump's design, the speed at which it operates, the impeller characteristics, the pressure conditions, and any resistance in the system downstream.

In practical applications, if the system pressure increases or if there are restrictions or blockages in the piping, the flow rate can change significantly, leading to variations in the volume of liquid discharged. This variability in flow is a hallmark characteristic of centrifugal pumps compared to positive displacement pumps, which do provide a relatively fixed volume per cycle of operation. Thus, the idea that a centrifugal pump discharges a fixed volume of liquid is not accurate in all scenarios.