5206Chemical EngineeringMedium
If h1 = inner film co-efficient and /h2 = outer film co-efficient, then the overall heat transfer co-efficient is________?
AAlways higher than h2
BAlways between h1 and h2
CAlways less than h1
DDependent on metal resistance
Correct answer
B. Always between h1 and h2
Explanation
The correct answer is Always between h1 and h2.