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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following pump is successfully used for lifting water to the turbines?

Air lift pump
Jet pump
Centrifugal pump
Reciprocating pump

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Hydraulics and Fluid Mechanics in ME
When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be

Nearly horizontal
First rise and then fall
Horizontal
Steep

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Hydraulics and Fluid Mechanics in ME
The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)

2gH
H × √(2g)
√(2gh)
2g × √H

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Hydraulics and Fluid Mechanics in ME
The magnitude of water hammer depends upon the

Speed at which the valve is closed
Elastic properties of the liquid flowing through the pipe
Elastic properties of the pipe material
All of these

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Hydraulics and Fluid Mechanics in ME
Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called

viscosity
compressibility
cohesion
adhesion

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Hydraulics and Fluid Mechanics in ME
The pressure of air __________ with the increase of height from the surface of the earth.

Does not change
Decreases
Increases
None of these

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