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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A flow is called super-sonic if the

Discharge is difficult to measure
Velocity of flow is very high
Mach number is between 1 and 6
None of these

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Hydraulics and Fluid Mechanics in ME
The surface tension of mercury at normal temperature is __________ that of water.

Same as
Lower than
None of these
Higher than

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Hydraulics and Fluid Mechanics in ME
The maximum thickness of boundary layer in a pipe of radius r is

2r
r/2
r

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Hydraulics and Fluid Mechanics in ME
If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is

43924
44078
27/8
43892

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Hydraulics and Fluid Mechanics in ME
The volumetric change of the fluid caused by a resistance is known as

Adhesion
Volumetric index
Volumetric strain
Compressibility

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Hydraulics and Fluid Mechanics in ME
In the case of steady flow of a fluid, the acceleration of any fluid particle is

constant
variable
zero under limiting conditions
zero

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