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

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Hydraulics and Fluid Mechanics in ME
The working of which of the following hydraulic units is based on Pascal's law?

Air lift pump
Hydraulic press
Jet pump
Hydraulic coupling

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Hydraulics and Fluid Mechanics in ME
A flow through an expanding tube at constant rate is called

Unsteady non-uniform flow
Steady non-uniform flow
Unsteady uniform flow
Steady uniform flow

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Hydraulics and Fluid Mechanics in ME
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is

equal
slightly more
slightly less
nearly half

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Hydraulics and Fluid Mechanics in ME
The unit of surface tension is

N/m
N/m2
N-m
N/m3

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Hydraulics and Fluid Mechanics in ME
A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is

0.78
0.87
0.46
0.64

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