One Question per Day on Refining Knowledge (Technology) 101116

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This post was last edited by dongliangsir on 2010-11-16 at 11:23. Everyone is welcome to actively participate in the learning and discussion of professional basic knowledge in the refinery processing technology exchange area! In accordance with the forum’s uniform requirements, the maximum score for this event is 5 Wealth points, and rating charm is prohibited. At the same time, friend requests and duplicate ratings are declined. Please be cautious when posting; edits will not be valid! Those who have different opinions on the provided answers can post discussions the next day, and those who provide solutions or their own opinions regarding the daily question will receive appropriate rewards! The focus is on participation, and there are prizes for participating! Friends who do not want their replies hidden can refer to: http://bbs.hcbbs.com/thread-492556-1-1.html 1 The volatility of each component in a solution refers to (　　). A. The ratio of the partial pressure of a component in the vapor to its molar fraction in the liquid phase in equilibrium with it. B. The ratio of the partial pressure of a component in the vapor to its volume fraction in the liquid phase in equilibrium with it. C. The ratio of the molar fraction in the equilibrium liquid phase to the partial pressure of the component in the vapor. D. The ratio of the volume fraction in the equilibrium liquid phase to the partial pressure of the component in the vapor. 2 When the actual reflux ratio is greater than the minimum reflux ratio, the number of theoretical plates required for distillation should be (　　). A. Many B. Few C. The same D. Infinite 3 The efficiency of a single slab is (　　). A. Equal to the overall tower efficiency. B. It refers to the ratio of the actual composition change of the gas phase or liquid phase before and after passing through a tower tray to the theoretical composition change before and after passing through that tray. C. The single-tray efficiency is the same for all trays. D. It is based on the concept of the required number of theoretical trays. 4. What is the definition of the overall tray efficiency? (　　) A. The ratio of the actual composition change in the gas phase before and after passing through the tower to the theoretical composition change. B. The ratio of the actual composition change in the liquid phase before and after passing through the tower to the theoretical composition change. C. The ratio of the number of theoretical plates required to achieve a specified separation effect to the actual number of plates. D. The ratio of the actual number of plates required to achieve a specified separation effect to the theoretical number of plates. 5. An error that changes according to a certain pattern is (　　). A. Systematic error B. Random error C. Gross error D. Standard error Answer: A B B C A