what is pump ?

pump is a mechanical device which is used to convert electrical 

energy into mechanical energy.a mechanical device using suction 

or pressure to raise or move liquids, compress gases, or force air

 into inflatable objects such as tyres.

Pumps operate by some mechanism and consume energy to

 perform mechanical work by moving the fluid. Pumps operate via 

many energy sources, including manual operation,

 electricity, engines, or wind power, come in many sizes, from 

microscopic for use in medical applications to large industrial 

pumps.

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