Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m2.C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the_________________?

A. Lower pressure drop through the exchanger is desired

B. Higher condensing film co-efficient is desired

C. Condensate is corrosive in nature

D. Temperature of the incoming vapor is very high

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