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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The flow in a pipe is turbulent when Reynold number is

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

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Hydraulics and Fluid Mechanics in ME
Unit of surface tension is

It has no units
Energy/unit area
Velocity/unit area
Both of the above

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Hydraulics and Fluid Mechanics in ME
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.

Three fourth
Double
One-half
Equal to

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Hydraulics and Fluid Mechanics in ME
The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is (where R is radius of pipe)

0.223 R
0.423 R
0.577 R
0.707 R

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

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

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

Remain unaffected
Decreases
Increases
Unpredictable

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