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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
If V1 and V2 are the velocities of water at inlet and outlet of the draft tube respectively, then the efficiency of a draft tube is

V1 / (V1 - V2)
(V­1² - V2²) / V1²
V1² / (V1² - V2²)
(V­1 - V2) / V1

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Hydraulics and Fluid Mechanics in ME
A hydraulic coupling belongs to the category of

Power developing machines
Energy generating machines
Energy transfer machines
Power absorbing machines

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Hydraulics and Fluid Mechanics in ME
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be

The same as the surface of liquid
Higher than the surface of liquid
Lower than the surface of liquid
Unpredictable

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

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

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Hydraulics and Fluid Mechanics in ME
A nozzle placed at the end of a water pipe line discharges water at a

Low pressure
High pressure
Low velocity
High velocity

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