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

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

To run the turbine full
To prevent air to enter the turbine
To transport water to downstream
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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