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Heat Transfer - Engineering

Q1:

The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness)

A ∝ t

B ∝ 1/t

C ∝ t

D independent of 't'

ANS:B - ∝ 1/t

For laminar film condensation on a vertical surface, the local surface conductance is inversely proportional to the film thickness (t). Therefore, the correct option is: ∝ 1/t