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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

(1 + cos φ)/2
(1 - cos φ)/2
(1 - sin φ)/2
(1 + sin φ)/2

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Hydraulics and Fluid Mechanics in ME
Dynamic viscosity of most of the gases with rise in temperature

remains unaffected
decreases
unpredictable
increases

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

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

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Hydraulics and Fluid Mechanics in ME
Capillary action is due to the

Adhesion of the liquid molecules and the molecules on the surface of a solid
Cohesion of the liquid
All of the listed here
Surface tension

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Hydraulics and Fluid Mechanics in ME
The specific speed (Ns) of a centrifugal pump is given by

(N√Q)/H5/4
(N√Q)/H3/4
(N√Q)/H
(N√Q)/H2/3

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Hydraulics and Fluid Mechanics in ME
Viscous force is the __________ of shear stress due to viscosity and cross-section area of flow.

Ratio
Different
Product
Sum

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