Maximum acceptable total liquid gradient over a tray is about _______________ mm?
Correct answer: B. 12.5
- A. 5.5
- B. 12.5
- C. 30.5
- D. 45.5
Explanation
The total liquid-level difference caused by gradient across a tray should generally be limited to about 12.5 mm. A larger gradient produces unequal liquid depth and contact time, reducing tray performance.
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