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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The flow in a pipe is neither laminar nor turbulent when Reynold number is

None of these
Between 2000 and 2800
More than 2800
Less than 2000

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Hydraulics and Fluid Mechanics in ME
The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is ap-proximately

30 mm
20 mm
10 mm
5 mm

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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
equal
less at low temperature and more at high temperature

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Hydraulics and Fluid Mechanics in ME
A manometer is used to measure

Pressure in Venturimeter
Difference of pressures between two points in a pipe
Atmospheric pressure
Pressure in pipes and channels

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Hydraulics and Fluid Mechanics in ME
The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

ηo = ηh × ηm
ηm = ηm × ηh
ηh = ηo × ηm
None of these

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

Diameter
Square of diameter
Cube of diameter
Fourth power of diameter

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