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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The depth of the bucket for a Pelton wheel is generally _________ the diameter of jet.

Equal to
Double
1.8 times
1.2 times

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Hydraulics and Fluid Mechanics in ME
The viscosity of a gas

decreases with increase in temperature
increases with increase in temperature
is independent of temperature
is independent of pressure for very high pressure intensities

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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

1
4
2
43924

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Hydraulics and Fluid Mechanics in ME
A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is

4.5 kN/m3
7.5 kN/m3
6 kN/m3
10 kN/m3

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Hydraulics and Fluid Mechanics in ME
A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm² and a volume of 0.039 m3 at 150 kg/cm². The bulk modulus of elasticity of liquid is

400 kg/cm²
4000 kg/cm²
40 × 10⁶ kg/cm²
40 × 10⁵ kg/cm²

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Hydraulics and Fluid Mechanics in ME
Falling drops of water become spheres due to the property of

viscosity
adhesion
cohesion
surface tension

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