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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury ?

0.5
0.515
0.4
0.5

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Hydraulics and Fluid Mechanics in ME
Metacentre is the point of intersection of

buoyant force and the center line of body
mid point between e.g. and center of buoyancy
All of these
vertical upward force through e.g. of body and center line of body

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

higher
lower
same
lower/higher depending on weight of body

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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

27/8
43892
44078
43924

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Hydraulics and Fluid Mechanics in ME
According to Bernoulli's equation

Z + p/w + v²/2g = constant
Z - p/w + v²/2g = constant
Z - p/w - v²/2g = constant
Z + p/w - v²/2g = constant

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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?

Pelton wheel
None of these
Francis turbine
Kaplan turbine

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