1.

The relation between relative effectiveness of horizontal and vertical tubes as condensing surfaces is given by

A. h <sub>h</sub>/h <sub>v </sub>= 0.768 (l/d)
B. h <sub>h</sub>/h <sub>v </sub>= 0.768 (l/d) <sup>0.25</sup>
C. h <sub>h</sub>/h <sub>v </sub>= 0.768 (l/d) <sup>0.5</sup>
D. h <sub>h</sub>/h <sub>v </sub>= 0.768 (l/d) <sup>1.25</sup>
Answer» C. h <sub>h</sub>/h <sub>v </sub>= 0.768 (l/d) <sup>0.5</sup>


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