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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is

1
2
4
43924

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Hydraulics and Fluid Mechanics in ME
Which place in hydraulic turbine is most susceptible for cavitations?

Inlet of draft rube
Penstock
Guide blade
Blade inlet

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Hydraulics and Fluid Mechanics in ME
The Newton's law of resistance is based on the assumption that the

Space around the body is completely filled with the fluid
All of these
Planes of the body are completely smooth
Fluid particles do not exert any influence on one another

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Hydraulics and Fluid Mechanics in ME
The divergent portion of a Venturimeter is made longer than convergent portion in order to

None of these
Both (A) and (B)
Avoid the tendency of breaking away the stream of liquid
To minimize frictional losses

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Hydraulics and Fluid Mechanics in ME
Which of the following turbine is preferred for a specific speed of 60 to 300 r.p.m.?

Pelton wheel
Francis turbine
Kaplan turbine
None of these

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Hydraulics and Fluid Mechanics in ME
If the net positive suction head (NPSH) requirement for the pump is not satisfied, then

No flow will take place
Excessive power will be consumed
Efficiency will be low
Cavitation will be formed

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