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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The property of fluid by virtue of which it offers resistance to shear is called

surface tension
viscosity
cohesion
adhesion

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Hydraulics and Fluid Mechanics in ME
The velocity corresponding to Reynold number of 2800, is called

Sub-sonic velocity
Super-sonic velocity
Lower critical velocity
Higher critical velocity

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Hydraulics and Fluid Mechanics in ME
The value of mass density in kgsecVm4 for water at 0°C is

1
100
101.9
1000

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Hydraulics and Fluid Mechanics in ME
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)

Cc × Cr
Cc × Cv
Cc/Cr
Cv × Cr

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Hydraulics and Fluid Mechanics in ME
In a reciprocating pump, air vessels are used to

Reduce acceleration head
Reduce suction head
Smoothen the flow
Increase delivery head

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Hydraulics and Fluid Mechanics in ME
The angle of contact in case of a liquid depends upon

the material which exists above the free surface of the liquid
both of die above
any one of the above
the nature of the liquid and the solid

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