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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.

One-half
Equal to
One-fourth
One-third

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Hydraulics and Fluid Mechanics in ME
If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is

2
1
4
43924

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Hydraulics and Fluid Mechanics in ME
If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will

rise until its weight equals the buoyant force
tend to move downward and it may finally sink
float
None of these

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

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Hydraulics and Fluid Mechanics in ME
The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as

Potential line
Path line
Stream line
Steak line

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Hydraulics and Fluid Mechanics in ME
The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is

600 kg/m3
800 kg/m3
400 kg/m3
200 kg/m3

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