Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around_______________?
Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around_______________?
A. 0.4-0.6
B. 0.35-0.75 C. 0.1-0.2 (Correct)
D. 0.55-0.85
