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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

Q = π.D.bf.V
Q = D.b.Vf
Q = π.D.Vf
Q = π.b.Vf

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Hydraulics and Fluid Mechanics in ME
Which of the following manometer has highest sensitivity

U-tube with mercury
micro-manometer with water
inclined U-tube
U-tube with water

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Hydraulics and Fluid Mechanics in ME
Piezometer is used to measure

Atmospheric pressure
Very low pressures
Pressure in pipe, channels etc
Difference of pressure between two points

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Hydraulics and Fluid Mechanics in ME
The cavitation in reaction turbines is avoided, to a great extent by

All of these
Providing highly polished blades to the runner
Using stainless steel runner of the turbine
Installing the turbine below the tail race level

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Hydraulics and Fluid Mechanics in ME
Metacentric height for small values of angle of heel is the distance between the

free surface and centre of buoyancy
centre of buoyancy and metacentre
centre of gravity and centre of buoy-ancy
centre of gravity and metacentre

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Hydraulics and Fluid Mechanics in ME
The impeller of a centrifugal pump may have

Any one of these
Volute casing with guide blades
Volute casing
Vortex casing

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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