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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece depends upon

Pressure of liquid
Velocity of liquid
Area of mouthpiece
Length of mouthpiece

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Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Reynolds number is

Between 2000 and 4000
More than 4000
Less than 4000
Less than 2000

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Hydraulics and Fluid Mechanics in ME
The vapour pressure over the concave surface is

zero
equal to the vapour pressure over the plane surface
greater than the vapour pressure over the plane surface
less man the vapour pressure over the plane surface

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

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

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Hydraulics and Fluid Mechanics in ME
A turbine pump is basically a centrifugal pump equipped additionally with

Vaned diffusion casing
Inlet guide blades
Adjustable blades
Backward curved blades

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Hydraulics and Fluid Mechanics in ME
The optimum value of vane exit angle for a centrifugal pump impeller is

50-60°
10-15°
20-25°
30-40°

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