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

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

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Process Equipment and Plant Design
Weep holes provided in the plates of a distillation column

All of these
Are normally located near the overflow weir so that any delivery of liquid during operation follows approximately the same path as the overflow fluid
Facilitate draining out liquid from a tray when the unit is not in operation
Must be large enough (usually 1/4" to 5/8" dia) to prevent plugging but should not deliver excessive amount of fluid during operation

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