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Which of the following element of hydroelectric power plant prevents the penstock from water hammer phenomenon?

Which of the following element of hydroelectric power plant prevents the penstock from water hammer phenomenon? Correct Answer Surge Tank

Sudden increase in water pressure in penstock due to closing of gates is called water hammer. Surge tank is a tank at sufficient height , connected to penstock through riser pipe. It takes the rejected water and relives the penstock from excessive water hammer pressure.

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