Production Technology [Daily Question] Tuesday, 01.03.2012
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The last edit to this post was made by Refinery Operator on 2012-1-15 at 17:26. Multiple-choice question: 1. The main principle for selecting the operating pressure of a distillation tower is ________. A. The economic viability of using refrigerant at the top of the tower and a heating medium at the bottom of the tower; B. The relative volatility of key components under different pressures; C. The pressure specified by safety regulations; D. The magnitude of the pressure drop in the tower. 2. Glass wool is commonly used for insulation in factories because its thermal conductivity is ________. A. Large B. Small C. Moderate D. Maximum Note: 1. Please hide your reply; see how to do this at: http://bbs.hcbbs.com/thread-492556-1-1.html. 2. Do not edit after replying. 3. All participants must receive a reward. Answer: A B
Reply to 1# Refinery Operator: 1. A B C 2. B
Answer: 1 B ; 2 B
Question 1: B Question 2: B
1 B. Relative volatility of key light and heavy components at different pressures 2 B. Small
Reply to 1# Refinery Operator: 1. A 2. B