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

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

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Hydraulics and Fluid Mechanics in ME
Buoyant force is

Equal to the volume of liquid displaced
The force necessary to maintain equilibrium of a submerged body
The resultant force acting on a floating body
The resultant force on a body due to the fluid surrounding it

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