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Q. |
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» B. Always between h1 and h2 |
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