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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The optimum value of vane exit angle for a centrifugal pump impeller is

20-25°
30-40°
10-15°
50-60°

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Hydraulics and Fluid Mechanics in ME
Kinematic viscosity is equal to

dynamic viscosity/density
density/dynamic viscosity
1/dynamicviscosity x density
dynamicviscosity x density

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Hydraulics and Fluid Mechanics in ME
The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

1.585 a.√(2gH)
1.855 aH.√(2g)
0.855 a.√(2gH)
5.85 aH.√(2g)

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Hydraulics and Fluid Mechanics in ME
The unit speed of the turbine runner is

N/H3/2
N/H
N/H²
N/√H

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Hydraulics and Fluid Mechanics in ME
A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)

4σ cosα/wd
4wd/σ cosα
σ cosα/4wd
wd/4σ cosα

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Hydraulics and Fluid Mechanics in ME
A flow in which __________ force is dominating over the viscosity is called turbulent flow.

Surface tension
Viscous
Elastic
Inertia

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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