Process Equipment and Plant Design
1.2 to 3.8 cms is the value of the

Downcomer liquid seal in case of a balanced tray design
All of these
Static submergence in case of a bubble cap tray for column operating under pressure (≥ 1 atm.)
Skirt clearance for bubble caps

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

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

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