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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The specific gravity of an oil whose specific weight is 7.85 kN/m3, is

1.6
1.2
1
0.8

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Hydraulics and Fluid Mechanics in ME
A liquid would wet the solid, if adhesion forces as compared to cohesion forces are

less
more
less at low temperature and more at high temperature
equal

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Hydraulics and Fluid Mechanics in ME
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. The saving in case of a double acting reciprocating pump is

0.848
0.488
0.392
0.884

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Hydraulics and Fluid Mechanics in ME
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is

dependent on relative roughness only
a function of Reynolds number and relative roughness
dependent only on Reynolds number
constant

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Hydraulics and Fluid Mechanics in ME
General energy equation holds for

turbulent flow
laminar flow
non-uniform flow
steady flow

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Hydraulics and Fluid Mechanics in ME
The property of a fluid which enables it to resist tensile stress is known as

cohesion
surface tension
compressibility
adhesion

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