Hydraulics and Fluid Mechanics in ME
Coefficient of velocity is defined as the ratio of

Actual discharge through an orifice to the theoretical discharge
Actual velocity of jet at vena contracta to the theoretical velocity
None of these
Area of jet at vena contracta to the area of orifice

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Hydraulics and Fluid Mechanics in ME
A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is

zero
one-half its value when cylinder was full
one-fourth its value when cylinder was full
cannot be predicted from the given data

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Hydraulics and Fluid Mechanics in ME
A floating body is said to be in a state of stable equilibrium

when the metacentre is below the centre of gravity
when the metacentre is above the centre of gravity
when its metacentric height is zero
only when its centre of gravity is below its centre of buoyancy

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