With reference to solar water pumps, consider the following statements:

1. Solar power can be used for running surface pumps and not for submersible pumps.

2. Solar power can be used for running centrifugal pumps and not the ones with piston.

Which of the statements given above is/are correct?

The correct answer is option 4.

Key Points

• Pumps are also classified as submersible and surface pumps, based on their placement (underwater and above the waterline).
• Solar power can be used for both running surface pumps and for submersible pumps. Hence, statement 1 is not correct.
• Solar power can be used for both running centrifugal pumps and ones with pistons.
• The pumping action is cyclic and can be driven by pistons, screws, gears, rollers, diaphragms, or vanes. Hence, statement 2 is not correct.

 Important Points

• The most common pump mechanics in Solar power pumps used are centrifugal pumps, multistage pumps, borehole pumps, and helical pumps.
• A solar water pump system is commonly seen in residential and commercial uses, as well as for irrigation of agricultural land.
• Through solar panels, the pump can eliminate the cost of energy and provide a more feasible option that uses energy from the sun.
• When it comes to stand-alone solar pumping systems, the main types include rotating and positive displacement pumps.
• Centrifugal pumps are the common choice for rotation and are designed for fixed head applications.
• Their output increases in proportion to their speed of rotation.