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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is _______ of the jet velocity,

Double
One-half
Three-fourth
One-fourth

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Hydraulics and Fluid Mechanics in ME
In an immersed body, center of pressure is

at the center of gravity
below be center of gravity
above the center of gravity
could be above or below e.g. depending on density of body and liquid

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Hydraulics and Fluid Mechanics in ME
For 450 m head of water, _________ shall be used.

Pelton wheel
Kaplan turbine
None of these
Francis turbine

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Hydraulics and Fluid Mechanics in ME
In a static fluid

Only normal stresses can exist
Linear deformation is small
Fluid pressure is zero
Resistance to shear stress is small

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Hydraulics and Fluid Mechanics in ME
The speed of sound in a ideal gas varies directly as its

absolute temperature
temperature
modulus of elasticity
density

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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.
When its e.g. is below its center of buoyancy
Metacentre has nothing to do with position of e.g. for determining stability

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