Hydraulics and Fluid Mechanics in ME
Surface tension

Is a function of the curvature of the interface
Decreases with fall in temperature
Is also known as capillarity
Acts in the plane of the interface normal to any line in the surface

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Hydraulics and Fluid Mechanics in ME
The flow ratio of Francis turbine is defined as the ratio of the

Velocity of runner at inlet to the velocity of flow at inlet
Theoretical velocity of jet to the velocity of flow at inlet
Velocity of flow at inlet to the theoretical jet velocity
None of these

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