If h1 = inner film co-efficient and /h2 = outer film co-efficient, the – McqOptions

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1.	If h1 = inner film co-efficient and /h2 = outer film co-efficient, then the overall heat transfer co-efficient is
A.	Always less than h1
B.	Always between h1 and h2
C.	Always higher than h2
D.	Dependent on metal resistance
Answer» C. Always higher than h2

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