Hydraulics and Fluid Mechanics in ME
The hydraulic efficiency of a reaction turbine, is the ratio of

Actual work available at the turbine to energy imparted to the wheel
Work-done on the wheel to the energy (or head of water) actually supplied to the turbine
None of these
Power produced by the turbine to the energy actually supplied by the turbine

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe or channel is said to be non-uniform when

Each liquid particle has a definite path
The quantity of liquid flowing per second is constant
The liquid particles at all sections have the same velocities
The liquid particles at different sections have different velocities

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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?

Metal piece will sink to the bottom
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

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