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

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

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Hydraulics and Fluid Mechanics in ME
When a body is placed over a liquid, it will sink down if

Gravitational force is more than the up-thrust of the liquid
Gravitational force is equal to the up-thrust of the liquid
Gravitational force is less than the up-thrust of the liquid
None of these

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Hydraulics and Fluid Mechanics in ME
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be

2A × (√H3/2 - √H3/2)/Cd × a × √(2g)
2A × √H₁/Cd × a × √(2g)
2A × (√H₁ - √H₂)/Cd × a × √(2g)
2A × √H₂/Cd × a × √(2g)

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