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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Roynolds number is

between 2000 and 4000
less than 4000
less than 2000
more than 4000

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Hydraulics and Fluid Mechanics in ME
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

Less than
Equal to
More than
None of these

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Hydraulics and Fluid Mechanics in ME
One stoke is equal to

10-3 m2/s
10-6 m2/s
10-4 m2/s
10-2 m2/s

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

remains unaffected
increases
unpredictable
decreases

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Hydraulics and Fluid Mechanics in ME
A notch is used to measure __________ of liquids.

Pressure
Velocity
Volume
Discharge

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Hydraulics and Fluid Mechanics in ME
For pipes, turbulent flow occurs when Reynolds number is

more than 4000
less than 2000
less than 4000
between 2000 and 4000

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