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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The mass per unit volume of a liquid at a standard temperature and pressure is called

Specific weight
Mass density
None of these
Specific gravity

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Hydraulics and Fluid Mechanics in ME
Power required to drive a centrifugal pump is directly proportional to _________ of its impeller.

Square of diameter
Fourth power of diameter
Diameter
Cube of diameter

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Hydraulics and Fluid Mechanics in ME
Newton’s law of viscosity relates

shear stress and rate of angular deformation
viscosity and rate of angular deformation
intensity of pressure and rate of angular deformation
shear stress, viscosity and temperature

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Hydraulics and Fluid Mechanics in ME
In steady flow of a fluid, the total accele ration of any fluid particle

is always zero
is never zero
is independent of coordinates
can be zero

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Hydraulics and Fluid Mechanics in ME
The unit of surface tension is

N-m
N/m2
N/m3
N/m

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Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.

Less than
Equal to
None of these
More than

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