Process Equipment and Plant Design
Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.

More than
Same as
Less than
Either more or less (depending upon relative volatility)

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Process Equipment and Plant Design
In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference

May be either more or less than geometric mean and arithmetic mean value depending upon whether the flow of stream is co-current or counter-current
Is always less than arithmetic average value
Is always less than arithmetic mean value, but more than geometric mean value
Is always more than arithmetic mean value and the geometric mean value

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