Hydraulics and Fluid Mechanics in ME
The meatcentric height is the distance between the

Centre of gravity of the floating body and the centre of buoyancy
Centre of gravity of the floating body and the metacentre
Metacentre and centre of buoyancy
Original centre of buoyancy and new centre of buoyancy

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Hydraulics and Fluid Mechanics in ME
The discharge through a channel of trapezoidal section is maximum when

Width of channel at the top is equal to twice the width at the bottom
The sloping side is equal to half the width at the top
Depth of channel is equal to the width at the bottom
The sloping side is equal to the width at the bottom

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

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