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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A point, in a compressible flow where the velocity of fluid is zero, is called

Critical point
None of the listed here
Stagnation point
Vena contracta

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Hydraulics and Fluid Mechanics in ME
A body floats in stable equilibrium

When its meatcentric height is zero
When the metacentre is above e.g.
Metacentre has nothing to do with position of e.g. for determining stability
When its e.g. is below its center of buoyancy

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Hydraulics and Fluid Mechanics in ME
According to equation of continuity,

w1v1 = w2v2
w1a1 = w2a2
a1/v1 = a2/v2
a1v1 = a2v2

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Hydraulics and Fluid Mechanics in ME
In the case of steady flow of a fluid, the acceleration of any fluid particle is

variable
zero
zero under limiting conditions
constant

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Hydraulics and Fluid Mechanics in ME
In a free nappe,

The pressure below the nappe is atmospheric
The pressure above the nappe is negative
The pressure above the nappe is atmospheric
The pressure below the nappe is negative

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Hydraulics and Fluid Mechanics in ME
Which of the following turbine is preferred for 0 to 25 m head of water?

Francis turbine
Kaplan turbine
None of these
Pelton wheel

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