Process Equipment and Plant Design
Vertical condenser is advantageous to the horizontal condenser from operation point of view, when

Sub cooling of condensate is desired
Hydrostatic head is required for refluxing the condensate
Only the function of condensation is to be carried out
Both the functions of condensation & sub cooling are carried out in a single unit

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Process Equipment and Plant Design
The LMTD correction factor (FT) is defined as the

Ratio of LMTD to the true temperature difference
Differenced of true temperature difference and the LMTD
Geometric mean of the true temperature difference and the LMTD
Ratio of true temperature difference to the LMTD

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids
Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution
The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty
In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes

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