Pick out the wrong statement.

Question

Options:

A . If sufficient residence time (around 8 seconds) is not proivided to the downcoming liquid in the downcomer, it may entrain some vapour

B . The liquid head in the downcomer should not be greater than one half the plate spacing to avoid flooding

C . The dischare end of the downcomer must project far enough into the tray liquid so that no gas bubbles can enter the open end and by pass the bubble caps

D . None of these

Answer: Option D

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