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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Fluid is a substance which offers no resistance to change of

Shape
Volume
Pressure
Flow

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Hydraulics and Fluid Mechanics in ME
Centre of buoyancy always

coincides with the centroid of the volume of fluid displaced
remains above the centre of gravity
remains below the centre of gravity
coincides with the centre of gravity

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Hydraulics and Fluid Mechanics in ME
For laminar flow in circular pipes, the Darcy’s friction factor f is equal to

16/Re
None of these
32/ Re
64/ Re

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Hydraulics and Fluid Mechanics in ME
According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

Inversely as square root of density
Directly as the air or gas density
As square of density
Inversely as density

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Hydraulics and Fluid Mechanics in ME
Resultant pressure of the liquid in the case of an immersed body acts through

Centre of gravity
Metacentre
Centre of buoyancy
Centre of pressure

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Hydraulics and Fluid Mechanics in ME
Axial flow pump is started with its delivery valve

Kept fully closed
Kept 50% open
Irrespective of any position
Kept fully open

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