What occurs if a centrifugal pump is not spinning properly?

If a centrifugal pump is not spinning properly, the consequence is a lower discharge pressure, low discharge head, and inefficient operation. Centrifugal pumps rely on the rotation of impellers to create kinetic energy, which then converts into pressure energy that pushes the fluid through the system. If the pump is not spinning effectively, this process is disrupted.

When the pump's impeller does not spin at the intended speed, it does not generate the necessary energy to move the fluid efficiently. Consequently, the discharge pressure drops because the pump cannot push the liquid out with sufficient force. The head, which is the height to which the pump can raise the liquid, is also reduced since the pump is not able to generate the required pressure differential. This inefficiency results in a significant loss in performance, leading to possible operational issues within the entire system.

While other options may relate to varying aspects of pump operation, the primary issue stemming from improper spinning is indeed centered around the reduction in discharge pressure and overall inefficiency.