Hydraulics and Fluid Mechanics in ME
The conditions for the stable equilibrium of a floating body are

a righting couple should be formed
the meta-center should lie above the center of gravity
the center of buoyancy and the center of gravity must lie on the same vertical line
all the above are correct

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Hydraulics and Fluid Mechanics in ME
The function of guide vanes in a reaction turbine is to

Allow the water to enter the runner without shock
Allow the required quantity of water to enter the turbine
Allow the water to flow over them, without forming eddies
All of the listed here

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