In case of surface condensers, a straight line is obtained on plotting 1/U vs. ____________ on an ordinary graph paper?
Correct answer: A. 1/V̅ -0.8
- A. 1/V̅ -0.8
- B. V̅ -0.8
- C. V̅ -2
- D. 1/ V̅ -2
Explanation
For flow inside condenser tubes, the film coefficient commonly varies approximately as V̅^0.8. Thus the resistance term varies as 1/V̅^0.8, giving a straight-line plot of 1/U against that quantity; option (a) is evidently using this notation.
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