Hydraulics and Fluid Mechanics in ME
The hydraulic grade line is

always sloping downward in the direction of flow
always above the centre line of pipe
never above the energy grade line
All of these

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

all the above are correct
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
a righting couple should be formed

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