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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Any change in load is adjusted by adjusting following parameter on turbine

Absolute velocity
Flow
Blade velocity
Net head

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Hydraulics and Fluid Mechanics in ME
Axial flow pump is started with its delivery valve

Irrespective of any position
Kept fully closed
Kept 50% open
Kept fully open

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Hydraulics and Fluid Mechanics in ME
The Francis formula for the discharge over Cipoletti weir is

1.84 LH1/2
1.84 LH3/2
1.84 LH5/2
1.84 LH

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Hydraulics and Fluid Mechanics in ME
Discharge of a centrifugal pump is (where N = Speed of the pump impeller)

Inversely proportional to N²
Inversely proportional to N
Directly proportional to N
Directly proportional to N²

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Hydraulics and Fluid Mechanics in ME
If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is

44078
43892
43924
27/8

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Hydraulics and Fluid Mechanics in ME
Two pipe systems can be said to be equivalent, when the following quantities are same

Friction loss and flow
Length and diameter
Flow and length
Friction factor and diameter

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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