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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For laminar flow in circular pipes, the Darcy’s friction factor f is equal to

None of these
16/Re
32/ Re
64/ Re

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Hydraulics and Fluid Mechanics in ME
Low specific speed of turbine implies it is

Any one of the above
Propeller turbine
Impulse turbine
Francis turbine

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Hydraulics and Fluid Mechanics in ME
The total pressure on an immersed surface inclined at an angle θ with the liquid surface is

wAx/sinθ
wA
wx
wAx

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Hydraulics and Fluid Mechanics in ME
High specific speed of a pump implies it is

Mixed flow pump
Axial flow pump
Centrifugal pump
Any one of the above

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Hydraulics and Fluid Mechanics in ME
The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is (Assume that boundary layer is entirely laminar)

0.05 cm
0.20 cm
0.10 cm
0.40 cm

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Hydraulics and Fluid Mechanics in ME
If the surface of liquid is convex, men

Cohesion pressure is decreased
There is no cohesion pressure
Cohesion pressure is increased
Cohesion pressure is negligible

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