Which are the correct statements?
(a) Film condensation usually occur on oily surface.
(b) Temperature of condensate gradually increases towards the liquid-vapour interface.
(c) Suitable coating is used to promote dropwise condensation.
(d) Dropwise condensation gives lower heat transfer rate than film condensation.
1
(a), (d)
2
(e), (d)
3
(a),(b)
4
(b), (c)
5
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