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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The speed ratio in case of Francis turbine varies from

0.15 to 0.3
0.4 to 0.5
1 to 1.5
0.6 to 0.9

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Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

atmospheric pressure
viscosity
air resistance
surface tension forces

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Hydraulics and Fluid Mechanics in ME
Which of the following has highest coefficient of discharge ?

CipoUetti weir
venturimeter
Borda’s mouthpiece running full
sharp edged orifice

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Hydraulics and Fluid Mechanics in ME
Bulk modulus of a fluid is the ratio of

Increase in pressure to the volumetric strain
Increase in volume to the viscosity of fluid
Critical velocity to the viscosity of fluid
Shear stress to shear strain

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Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be

Running full
Running free
Partially running full
Partially running free

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Hydraulics and Fluid Mechanics in ME
Cavitation is caused by

high pressure
high velocity
low pressure
weak material

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