Hydraulics and Fluid Mechanics in ME
Metacentre is the point of intersection of

vertical upward force through e.g. of body and center line of body
mid point between e.g. and center of buoyancy
All of these
buoyant force and the center line of body

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Hydraulics and Fluid Mechanics in ME
In a reaction turbine, the draft tube is used

To increase the head of water by an amount equal to the height of the runner outlet above the tail race
To transport water to downstream
To run the turbine full
To prevent air to enter the turbine

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Hydraulics and Fluid Mechanics in ME
The total head of a liquid particle in motion is equal to

Potential head - (pressure head + kinetic head)
Kinetic head - (pressure head + potential head)
Pressure head - (kinetic head + potential head)
Pressure head + kinetic head + potential head

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