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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.

Compressible
Incompressible
None of these
Viscous

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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
Lies below
Coincides with

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Hydraulics and Fluid Mechanics in ME
Liquids

Occupy definite volume
Are not affected by change in pressure and temperature
Cannot be compressed
None of the listed here

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Hydraulics and Fluid Mechanics in ME
Which of the following statement is correct as regard to water wheels?

They give constant efficiency, even if the discharge is not constant
They have slow speeds
They are suitable even for low water heads
All of these

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Hydraulics and Fluid Mechanics in ME
Gradually varied flow is

non-steady non-uniform
non-steady uniform
steady non-uniform
steady uniform

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Hydraulics and Fluid Mechanics in ME
The length of a liquid stream while flowing over a weir __________ at the ends of the sill.

Contracts
Does not change
Expands
None of these

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