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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a

Weir
Notch
Mouthpiece
Nozzle

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Hydraulics and Fluid Mechanics in ME
The centre of gravity of the volume of the liquid displaced is called

None of the listed here
Metacentre
Centre of buoyancy
Centre of pressure

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Hydraulics and Fluid Mechanics in ME
The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

0.81 times
0.95 times
0.67 times
0.34 times

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Hydraulics and Fluid Mechanics in ME
According to Bernoulli's equation

Z + p/w - v²/2g = constant
Z - p/w + v²/2g = constant
Z - p/w - v²/2g = constant
Z + p/w + v²/2g = constant

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Hydraulics and Fluid Mechanics in ME
For starting an axial flow pump, its delivery valve should be

Closed
Could be either open or closed
Depends on starting condition and flow desired
Open

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Hydraulics and Fluid Mechanics in ME
The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is (Assume that boundary layer is entirely laminar)

0.40 cm
0.20 cm
0.05 cm
0.10 cm

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