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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A flow is called hyper-sonic, if the Mach number is

Unity
None of these
Less than unity
Between 1 and 6

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Hydraulics and Fluid Mechanics in ME
Which of the following is used to measure the discharge ?

hotwire anemometer
current meter
pitot tube
venturimeter

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Hydraulics and Fluid Mechanics in ME
The ratio of absolute viscosity to mass density is known as

viscosity index
specific viscosity
coefficient of viscosity
kinematic viscosity

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Hydraulics and Fluid Mechanics in ME
In a free nappe,

The pressure above the nappe is negative
The pressure below the nappe is atmospheric
The pressure below the nappe is negative
The pressure above the nappe is atmospheric

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Hydraulics and Fluid Mechanics in ME
The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

1.585 a.√(2gH)
0.855 a.√(2gH)
5.85 aH.√(2g)
1.855 aH.√(2g)

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Hydraulics and Fluid Mechanics in ME
For small discharge at high pressure, following pump is preferred

Mixed flow
Reciprocating
Centrifugal
Axial flow

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