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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Casting of a centrifugal pump is designed so as to minimize

Static head
Cavitations
Friction loss
Loss of kinetic energy

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Hydraulics and Fluid Mechanics in ME
The surface tension of mercury at normal temperature is __________ that of water.

Lower than
Higher than
None of these
Same as

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Hydraulics and Fluid Mechanics in ME
Water is _________ liquid.

A compressible
Both A and B
None of these
An incompressible

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Hydraulics and Fluid Mechanics in ME
The flow ratio in case of Francis turbine varies from

0.6 to 0.9
0.15 to 0.3
1 to 1.5
0.4 to 0.5

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Hydraulics and Fluid Mechanics in ME
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be

3 meters of water column
5 meters of water column
6 meters of water Column
2 meters of water column

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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)

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

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