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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to

Half the breadth
Half the depth
Twice the breadth
Twice the depth

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Hydraulics and Fluid Mechanics in ME
Liquids

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

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Hydraulics and Fluid Mechanics in ME
The equation of continuity holds good when the flow

is steady
velocity is uniform at all the cross sec-tions
is one dimensional
All of these

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Hydraulics and Fluid Mechanics in ME
The depth of center of pressure of an immersed surface, inclined at an angle 'θ' with the liquid surface lies at a distance equal to __________ the center of gravity.

IG sin²θ/Ax̅ above
IG sinθ/Ax̅ below
IG sinθ/Ax̅ above
IG sin²θ/Ax̅ below

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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
Viscous
None of these
Incompressible

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Hydraulics and Fluid Mechanics in ME
In a Kaplan turbine runner, the numbers of blades are generally between

4 to 8
8 to 16
16 to 24
2 to 4

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