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Q. |
Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then |
A. | U1 = U2 |
B. | U2 > U1 |
C. | U1 > U2 |
D. | U1 = dirt factor - U2 |
Answer» A. U1 = U2 |
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