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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge through a reaction turbine ___ with the increase in unit speed.

Decreases
None of the listed here
Remain same
Increases

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Hydraulics and Fluid Mechanics in ME
The overall efficiency for a Pelton wheel lies between

0.65 to 0.75
0.85 to 0.90
0.50 to 0.65
0.75 to 0.85

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Hydraulics and Fluid Mechanics in ME
Power required to drive a centrifugal pump is directly proportional to _________ of its impeller.

Square of diameter
Cube of diameter
Diameter
Fourth power of diameter

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Hydraulics and Fluid Mechanics in ME
The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)

wA
wA/x
wAx
wx

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Hydraulics and Fluid Mechanics in ME
The force of buoyancy is always __________ the weight of the liquid displaced by the body.

Equal to
More than
Less than
None of these

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Hydraulics and Fluid Mechanics in ME
The maximum discharge over a broad crested weir is

1.71 Cd × L × H1/2
1.71 Cd × L × H3/2
0.384 Cd × L × H3/2
0.384 Cd × L × H1/2

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