Process Equipment and Plant Design
Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the

Liquid/vapor loading across the column remains constant
Trouton's rule is applicable
Sensible heat differences are small, because the temperature changes from tray to tray is small
All of these

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Process Equipment and Plant Design
Pick out the wrong statement about the design of seive plate column and the bubble cap column.

The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns
Weir length for a bubble cap plate is the same as that for the seive plate
Weir height for a bubble cap plate column is the same as that for a seive plate column
Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate

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