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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The velocity of jet of water traveling out of opening in a tank filled with water is proportional to

V/T
Head of water (h)
h/2
h²

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Hydraulics and Fluid Mechanics in ME
The specific weight of sea water is __________ that of pure water.

Same as
Less than
More than
None of these

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Hydraulics and Fluid Mechanics in ME
According to fan laws, for the fans having constant wheel diameters, the power demand varies

Square of fan speed
Square root of fan speed
Cube of fan speed
Directly as fan speed

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Hydraulics and Fluid Mechanics in ME
The height of a water column equivalent to a pressure of 0.15 MPa is

35.3 m
15.3 m
45.3 m
25.3 m

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Hydraulics and Fluid Mechanics in ME
Center of buoyancy is the

e.g. of floating body
center of pressure of displaced volume
does not exist
centroid of the displaced volume of fluid

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Hydraulics and Fluid Mechanics in ME
According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

(2/3) × Cd (L - nH) × √(2gh)
(2/3) × Cd (L - 0.1nH) × √(2g) × H3/2
(2/3) × Cd (L - nH) × √(2g) × H²
(2/3) × Cd (L - nH) × √(2g) × H5/2

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