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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 piston.

Which of the statements given above is/are correct?

This questions was previously asked in

UPSC CSP Previous Year Paper (2020)

1 only

2 only

Both 1 and 2

Neither 1 nor 2

Both statements are incorrect.

Solar PV is still the best way to run a water pump on solar energy. Whether you use submersible or surface water pumps, you can use it to pump water during the day or at night in any weather condition.

There are two main types of solar water pump technologies:

The centrifugal pump, which uses high speed rotation to suck water in through the middle of the pump.
The positive displacement pump, which usually uses a piston to transfer water.

Hence option 4th is correct.

By: Abhipedia