Process Equipment and Plant Design
A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the

Central dished section and corner torus section
Central dished section and straight flange section
Corner torus section and central dished section
Straight flange section and corner torus section

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Process Equipment and Plant Design
Overall tray efficiency of a distillation column is the ratio of the number of

None of these
Real trays required to the number of ideal trays required
Overall gas transfer units to the number of ideal trays required
Ideal trays required to the number of real trays required

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