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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

3.0 m
2.5 m
2.4 m
4.0 m

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Hydraulics and Fluid Mechanics in ME
Which of the following statement is correct as regard to water wheels?

They have slow speeds
They give constant efficiency, even if the discharge is not constant
All of these
They are suitable even for low water heads

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

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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

43924
27/8
44078
43892

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

equal to the vapour pressure over the plane surface
zero
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
Puck up the wrong statement about centrifugal pump

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

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