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

In differential (simple) distillation, the vapour is removed as soon as it is formed without appreciable condensation
Distillation under vacuum is a substitute for steam distillation
Flash distillation, differential distillation & steam distillation are all continuous distillation processes
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

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Process Equipment and Plant Design
In a vertical short tube evaporator (Calendria type), the

All of these
Liquor is inside the tube while the steam is outside the tube
Area of central downtake is equal to 40 to 100% of total cross-sectional area of the surrounding tube
Tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylinderical drum dia of 1-6 metres are normally used

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