Hydraulics and Fluid Mechanics in ME
The hydraulic efficiency of an impulse turbine is the

Ratio of the actual power produced by the turbine to the energy actually supplied by the turbine
Ratio of the work done on the wheel to the energy of the jet
None of these
Ratio of the actual work available at the turbine to the energy imparted to the wheel

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

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

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