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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Flow occurring in a pipeline when a valve is being opened is

steady
unsteady
vortex
laminar

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Hydraulics and Fluid Mechanics in ME
If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

0.417 H5/2
7.141 H5/2
1.417 H5/2
4.171 H5/2

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Hydraulics and Fluid Mechanics in ME
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. The saving in case of a double acting reciprocating pump is

0.884
0.392
0.488
0.848

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Hydraulics and Fluid Mechanics in ME
A body floating in a liquid is said to be in neutral equilibrium, if its metacentre

Coincides with its centre of gravity
Lies between the centre of buoyancy and centre of gravity
Lies above its centre of gravity
Lies below its centre of gravity

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Hydraulics and Fluid Mechanics in ME
The velocity corresponding to Reynold number of 2000 is called

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

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Hydraulics and Fluid Mechanics in ME
A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called

Pascal’s law
Archimedes’s principle
D-Alembert’s principle
None of these

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