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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium.

None of these
Unstable
Stable
Neutral

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Hydraulics and Fluid Mechanics in ME
Flow occurring in a pipeline when a valve is being opened is

laminar
steady
unsteady
vortex

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Hydraulics and Fluid Mechanics in ME
According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies

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

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Hydraulics and Fluid Mechanics in ME
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

None of these
Equal to
Less than
More than

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Hydraulics and Fluid Mechanics in ME
The velocity corresponding to Reynold number of 2800, is called

Super-sonic velocity
Lower critical velocity
Sub-sonic velocity
Higher critical velocity

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Hydraulics and Fluid Mechanics in ME
Head developed by a centrifugal pump depends on

Speed
Impeller diameter
Both (A) and (B) above
Fluid density

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