Ans. Submersible pump by name it works in the water immersed condition. Generally, they are used in Bore-well. It consists of two parts, one motor and other pump. The motor is similar either a single phase or three phase induction motor. It is specially designed as its armature is comparatively longer and diameter is less impeller stages and made to work in water. The pump consists of impeller and guide wanes similar to a turbine generally for more delivery of water, number of stages are added to suit our requirement. When supply is given the electric motor works. The water is sucked into impeller it gains kinetic energy and goes over stages. During this, it gains kinetic energy. By casing it converts as pressure energy. At the end, the water is delivered through delivery pipe.