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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Metacentric height is the distance between the metacentre and

water surface
center of gravity
center of pressure
center of buoyancy

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Hydraulics and Fluid Mechanics in ME
The discharge in an open channel corresponding to critical depth is

Maximum
None of these
Minimum
Zero

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

Below be centre of gravity
At the centre of gravity
Above the centre 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
The upper surface of a weir over which water flows is known is

crest
weir top
sill
nappe

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Hydraulics and Fluid Mechanics in ME
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

(2A√H₁)/(Cd × a√2g)
(2AH₁²)/(Cd × a√2g)
(2AH₁3/2)/(Cd × a√2g)
(2AH₁)/(Cd × a√2g)

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Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be

Partially running free
Partially running full
Running free
Running full

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