Which of the following mechanical factors affects pump efficiency?

The choice of discharge hose length as a factor affecting pump efficiency is rooted in the principles of fluid dynamics and the mechanics of fluid transport. Pump efficiency can be heavily influenced by the resistance the fluid encounters as it moves through a system. A longer discharge hose increases the friction losses as the fluid flows through the hose, which requires the pump to work harder to maintain the desired flow rate.

When the length of the discharge hose increases, the total dynamic head that the pump must overcome also rises due to increased friction losses, which can lead to significant reductions in pump efficiency. Hence, if a pump is required to exert additional energy to push fluid through a longer hose, this energy loss translates into reduced overall efficiency.

While other factors, such as the design of the seacock valve, the quality of the electrical supply, and the material of the pump casing, may play roles in the overall operational framework of pump systems, they do not directly impact efficiency in the same manner as discharge hose length. The design of the seacock valve affects flow and potential obstruction but is not as critical in determining overall efficiency. Similarly, electrical supply quality impacts pump operation but is more about maintaining proper function than direct mechanical efficiency. Lastly, the pump casing material may have implications for durability and