Hydraulics and Fluid Mechanics in ME
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?

The metal piece will be immersed in mercury by half
Metal piece will sink to the bottom
The metal piece will simply float over the mercury
Whole of the metal piece will be immersed with its top surface just at mercury level

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

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

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