Question

What is pump efficiency?

(a) P.E. = Water Horse Power * Shaft Horse Power

(b) P.E. = Water Horse Power – Shaft Horse Power

(c) P.E. = Water Horse Power + Shaft Horse Power

(d) P.E. = \(\frac{Water \, Horse \, Power}{Shaft \, Horse \, Power} \)

The question was asked in my homework.

The above asked question is from Plant Protection Equipments topic in chapter Plant Protection Equipments of Farm Machinery

Answer 1

Right choice is (d) P.E. = \(\frac{Water \, Horse \, Power}{Shaft \, Horse \, Power} \)

The best explanation: Pump efficiency is defined as the ratio of water horsepower output from the pump to the shaft horsepower input for the pump. Water horsepower is determined by the flow rate and pressure delivered to the pump from the power unit, which is usually an electric motor or internal combustion engine.