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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A large Reynold number is indication of

Highly turbulent flow
Steady flow
Smooth and streamline flow
Laminar flow

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Hydraulics and Fluid Mechanics in ME
For small discharge at high pressure, following pump is preferred

Reciprocating
Axial flow
Mixed flow
Centrifugal

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Hydraulics and Fluid Mechanics in ME
The height of a water column equivalent to a pressure of 0.15 MPa is

45.3 m
35.3 m
25.3 m
15.3 m

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Hydraulics and Fluid Mechanics in ME
Center of buoyancy is the

center of pressure of displaced volume
does not exist
centroid of the displaced volume of fluid
e.g. of floating body

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Hydraulics and Fluid Mechanics in ME
The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)

wAx
wA/x
wx
wA

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Hydraulics and Fluid Mechanics in ME
Choose the correct relationship

kinematicviscosity = dynamicviscosity x density
specific gravity = gravity x density
dynamicviscosity = kinematicviscosity x density
gravity = specific gravity x density

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