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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A structure used to dam up a stream or river over which the water flows is called

Orifice
Notch
Dam
Weir

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Hydraulics and Fluid Mechanics in ME
The time oscillation of a floating body with increase in metacentric height will be

same
lower/higher depending on weight of body
higher
lower

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Hydraulics and Fluid Mechanics in ME
Metacentric height for small values of angle of heel is the distance between the

centre of gravity and centre of buoy-ancy
centre of buoyancy and metacentre
free surface and centre of buoyancy
centre of gravity and metacentre

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Hydraulics and Fluid Mechanics in ME
According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

Inversely as density
Inversely as square root of density
Directly as the air or gas density
As square of density

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Hydraulics and Fluid Mechanics in ME
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

A × M × m1/2 × i2/3
A1/2 × M2/3 × m × i
A × M × m2/3 × i1/2
A2/3 × M1/3 × m × i

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Hydraulics and Fluid Mechanics in ME
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as

turbulent flow
one dimensional flow
steady flow
uniform f^w

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