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Question
Saturated steam is allowed to condense over a vertical flat surface and the condensate film flows down the surface. The local coefficient of heat transfer for condensation
Options:
A .  Remains constant at all heights of the surface
B .  Decreases with increasing distance from the top of the surface
C .  Increases with increasing thickness of film
D .  Increases with increasing temperature differential between the surface and vapour
Answer: Option B
Answer: (b).Decreases with increasing distance from the top of the surface

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