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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

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

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Hydraulics and Fluid Mechanics in ME
Dynamic viscosity of most of the gases with rise in temperature

decreases
unpredictable
increases
remains unaffected

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Hydraulics and Fluid Mechanics in ME
When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

0.707 a. √2gH
0.855 a. √2gH
0.5 a. √2gH
√2gH

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Hydraulics and Fluid Mechanics in ME
The units of kinematic viscosity are

metres² per sec
newton-sec per meter
kg sec/meter
newton-sec per meter

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Hydraulics and Fluid Mechanics in ME
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than

viscosity
surface friction
All of these
frictional force

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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 approximately

5 mm
10 mm
30 mm
20 mm

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