Hydraulics and Fluid Mechanics in ME
The purpose of a surge tank is

All of these
To control the pressure variations due to rapid changes in the pipe line flow
To eliminate water hammer possibilities
To regulate flow of water to turbines by providing necessary retarding head of water

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Hydraulics and Fluid Mechanics in ME
Meta-centric height is given as the distance between

The center of gravity of the body and the center of buoyancy
The center of gravity of the body and the metacenter
The center of gravity of the body and the center of pressure
Center of buoyancy and metacenter

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