Q88. With reference to solar water pumps, consider the following statements:
- Solar power can be used for running surface pumps and not for submersible
pumps, - Solar power can be used for running centrifugal pumps and not the ones with pistons.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Answer: D
- Solar water pumps, a relatively new concept in mechanics, are commonly seen in residential and commercial uses, as well as for irrigation of agricultural land. A typical solar-powered pumping system consists of a solar panel array that powers an electric motor, which in turn powers a bore or surface pump. The water is often pumped from the ground or stream into a storage a tank that provides a gravity feed, so energy storage is not needed for these systems. Through solar panels, the pump can eliminate the cost of energy and provide a more feasible option that uses energy from the sun (and not fuel-burning mechanisms) for pumping water.
- Statement 1 and statement 2 are not correct: When it comes to stand-alone solar pumping systems, the main types include rotating and positive displacement pumps. So, solar power neither can be used for running surface pumps and not for submersible pumps nor can be used for centrifugal pumps and not ones with pistons.
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