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In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

1/10-1/15th
1/5-1/10th
1/20-1/30th
1/2 to 1/4th

Correct Answer: 1/10-1/15th

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