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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The property by virtue of which a liquid opposes relative motion between its different layers is called

Osmosis
Viscosity
Coefficient of viscosity
Surface tension

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Hydraulics and Fluid Mechanics in ME
If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is

1
2
43924
4

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Hydraulics and Fluid Mechanics in ME
In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)

p/2sinα
2p/sinα
2p/sin (α/2)
p/sinα

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Hydraulics and Fluid Mechanics in ME
The undershot water wheels are those in which

The wheel runs entirely by the weight of water
The wheel runs entirely by the impulse of water
None of these
The wheel runs partly by the weight of water and partly by the impulse of water

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Hydraulics and Fluid Mechanics in ME
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)

Cc/Cr
Cv × Cr
Cc × Cr
Cc × Cv

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Hydraulics and Fluid Mechanics in ME
The surface tension of mercury at normal temperature is __________ that of water.

None of these
Same as
Higher than
Lower than

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