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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

1.84(L - 0.1nH)H3/2
1.84(L - nH)H3
1.84(L - nH)H2
1.84(L - 0.1nH)H5/2

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Hydraulics and Fluid Mechanics in ME
If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is

43924
44078
27/8
43892

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Hydraulics and Fluid Mechanics in ME
The magnitude of water hammer depends upon the

Elastic properties of the liquid flowing through the pipe
All of these
Speed at which the valve is closed
Elastic properties of the pipe material

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Hydraulics and Fluid Mechanics in ME
Stream lines and path lines always coincide in case of

steady flow
laminar flow
uniform flow
turbulent flow

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

Are equal in size and shape
Are identical in shape, but differ only in size
None of these
Have identical velocities

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Hydraulics and Fluid Mechanics in ME
An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called

Weir
None of these
Notch
Orifice

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