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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

surface tension forces
viscosity
atmospheric pressure
air resistance

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Hydraulics and Fluid Mechanics in ME
If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water

51 cm
52.2 cm
52 cm
50 cm

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Hydraulics and Fluid Mechanics in ME
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

V/(vr - v)
2V/(vr - v)
V/(vr + v)
2V/(vr + v)

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Hydraulics and Fluid Mechanics in ME
Practical fluids

possess surface tension
possess all the above properties
are compressible
are viscous

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Hydraulics and Fluid Mechanics in ME
The jet ratio is defined as the ratio of the

Diameter of Pelton wheel to the diameter of jet
Diameter of jet to the diameter of Pelton wheel
Velocity of Pelton wheel to the velocity of jet
Velocity of jet to the velocity of Pelton wheel

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Hydraulics and Fluid Mechanics in ME
When the velocity distribution is uniform over the cross-section, the correction factor for momentum is

2
43924
1

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