Normally, the ratio of the total riser area to the tower cross section – McqOptions

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1.	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
D.	0.55-0.85
Answer» D. 0.55-0.85

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