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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The ratio of the inertia force to the viscous force is called

Euler's number
Reynold's number
Weber's number
Froude's number

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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

0.392
0.848
0.884
0.488

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Hydraulics and Fluid Mechanics in ME
The viscosity of a gas

decreases with increase in temperature
is independent of pressure for very high pressure intensities
is independent of temperature
increases with increase in temperature

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Hydraulics and Fluid Mechanics in ME
In a depressed nappe

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

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Hydraulics and Fluid Mechanics in ME
A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.

None of these
Lies above
Coincides with
Lies below

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Hydraulics and Fluid Mechanics in ME
A liquid would wet the solid, if adhesion forces as compared to cohesion forces are

equal
less at low temperature and more at high temperature
more
less

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