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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Puck up the wrong statement about centrifugal pump

Head a speed²
Discharge a diameter
Power a speed⁴
Head a diameter

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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

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

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Hydraulics and Fluid Mechanics in ME
Reynold's number is the ratio of inertia force to

Viscous force
Gravity force
Pressure force
Elastic force

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Hydraulics and Fluid Mechanics in ME
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to

21000
2700
2100
10000

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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

43892
43924
44078
27/8

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Hydraulics and Fluid Mechanics in ME
A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

b²/12 + x̅
(d²/12 x̅) + x̅
(bd²/12) + x̅
d²/12 + x̅

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