If h 1 = inner film co-efficient and / h 2 = outer film co-efficient, then the overall heat transfer co-efficient is

If h 1 = inner film co-efficient and / h 2 = outer film co-efficient,

1.	If h 1 = inner film co-efficient and / h 2 = outer film co-efficient, then the overall heat transfer co-efficient is
A.	always less than h 1
B.	always between h 1 and h 2
C.	always higher than h 2
D.	dependent on metal resistance
Answer» C. always higher than h 2

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If h 1 = inner film co-efficient and / h 2 = outer film co-efficient, then the overall heat transfer co-efficient is

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