In case of 1.5″ heat exchanger tubes, the inside flow area _____________ with decrease in BWG?
Correct answer: D. Decreases
- A. Increases
- B. None of these
- C. Remains same
- D. Decreases
Explanation
A decrease in BWG number means a thicker tube wall, so the inside diameter becomes smaller for the same outside diameter. Since flow area is proportional to the square of inside diameter, it decreases.
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