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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Falling drops of water become spheres due to the property of

surface tension
viscosity
adhesion
cohesion

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Hydraulics and Fluid Mechanics in ME
The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)

wA/x
wAx
wA
wx

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Hydraulics and Fluid Mechanics in ME
Geometric similarity is said to exist between the model and the prototype, if both of them

Have identical forces
Have identical velocities
Are equal in size and shape
Are identical in shape, but differ only in size

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Hydraulics and Fluid Mechanics in ME
The discharge over a triangular notch is

Inversely proportional to H5/2
Inversely proportional to H3/2
Directly proportional to H5/2
Directly proportional to H3/2

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Hydraulics and Fluid Mechanics in ME
Coefficient of velocity of venturimeter

None of these
decreases with higher Reynolds number
is independent of Reynolds number
is equal to the coefficient of discharge of venturimeter

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Hydraulics and Fluid Mechanics in ME
Reaction turbines are used for

High head
High head and low discharge
Low head
Low head and high discharge

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