Process Equipment and Plant Design
A pipe is generally made of circular cross-section, because a circular cross-section has the

Both A & B
None of these
Higher structural strength
Lowest surface area requirement for a given volume

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Process Equipment and Plant Design
Pick out the wrong statement about distillation operation

Flash distillation, differential distillation & steam distillation are all continuous distillation processes
Distillation under vacuum is a substitute for steam distillation
In flash (equilibrium) distillation, a definite fraction of liquid is vaporised in such a way that the evolved vapour & residual liquids are in equilibrium with each other
In differential (simple) distillation, the vapour is removed as soon as it is formed without appreciable condensation

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Process Equipment and Plant Design
Generally, elliptical dished heads

Are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m²
Resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter
All of these
Are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D

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