Note: Real exam questions from 2012, Knowledge section, Morning session, Question 68
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68. When designing a tray tower, the opening ratio of the trays, the amount of mist entrained, and the operating flexibility are key design parameters. The correct values are as follows: A. The total area of the downcomers is usually between 3% and 30% of the tower’s cross-sectional area. B. The lower limit for operating flexibility is 20%. C. The typical opening ratio for trays is between 5% and 15%. D. The pore size commonly used in industrial towers is between 3 and 8 mm. Some friends have indicated that the correct answers are ACD. Is this correct? In what materials can I find relevant information? Sorry for the trouble
There is a tower design manual, and there is also a Chemical Process Design Manual (Volume 1)!
D is incorrect, right? The Chemical Process Design Manual 493 also states that 4-6 mm is commonly used
Sure, books can also have errors too! :lol
Professional knowledge, Question 68 in the morning: http://bbs.hcbbs.com/thread-1328981-1-17.html http://bbs.hcbbs.com/thread-1322357-1-42.html http://bbs.hcbbs.com/thread-1234081-1-47.html