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

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Hydraulics and Fluid Mechanics in ME
Cavitation will begin when

pressure is increased
flow is increased
the pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid
pressure becomes more than critical pressure

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