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Heat Transfer

Q1:

Film condensation is promoted on a/an __________ surface.

A oily

B coated

C clean & smooth

D dirty

ANS:C - clean & smooth

Film condensation is promoted on clean and smooth surfaces. When a surface is clean and smooth, it allows the condensed liquid to form a uniform film, facilitating heat transfer. Dirty surfaces or surfaces with contaminants can disrupt this film formation, leading to less efficient condensation. Therefore, the correct choice is clean & smooth.



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