Refining Knowledge (Technology) Daily Question (24)10.16

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This post was last edited by bingfeng1203 on 2009-10-16 22:41. Welcome everyone to actively participate in the learning of professional basic knowledge in the Refining and Processing Technology Exchange Area.* and discuss! According to the unified requirements of the forum, the maximum rating for this activity is 10 wealth, and ratings of charm are prohibited. At the same time, friendship and repeated ratings are declined. In addition, if you answer questions from the same IP address, only the first answer will be valid. Please be careful when posting, editing is invalid! Those who have different opinions on the reference answers provided can post for discussion the next day, and appropriate rewards will be given to those who provide answers or personal opinions to the reference answers to the daily questions! The important thing is to participate, and you will get prizes if you participate! In order to prevent some members from plagiarizing other members' answers, please hide your posts when answering questions. For specific hiding methods, see: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Note: Oil refining knowledge (technology) daily question urgently solicits questions from friends: http://bbs.hcbbs.com/thread-553526-1-1.html Answerers are expected to actively participate! 1. Single choice questions. 1. Engler’s distillation and real boiling point distillation in the laboratory both belong to__ _ _ _ _ . A. One-time vaporization B. Gradual vaporization C. One-time condensation D. Multiple condensations 2. During the distillation process, the gas-liquid phase__ _ _ _ _ The difference is the driving force of mass transfer. A. Temperature B. Density C. Pressure D. Concentration 3. The purpose of installing baffles in heat exchangers is__ _ _ _ _ . A. Reduce the convection of the shell-side fluid B. Increase the convection of the shell-side fluid C. Tighten the tube bundle D. Reduce the flow rate of the shell-side fluid 4. The diameter of the primary distillation tower is limited by the following: ( ) A. Liquid flooding B. Mist entrainment C． Flooded Tower D． The liquid residence time in the downcomer pipe of the stripping section 5. my country's automotive gasoline quality standards stipulate that the 10% distillation temperature shall not be higher than ( ) ℃. A． 65 B. 70 c. 100 D. 110 2. True or false questions. 6. Fluids with low pressure must go through the shell side to save manufacturing costs. ( ) 7. When the operating flow rate of the centrifugal main fan is less than 50-70% of the rated flow rate, surge will occur. ( ) 8. Some boilers are full of water, while others are not. If it is above the highest water level but the water level can still be seen, it is not considered seriously full of water. ( ) 9. When judging the leakage of the pressure reducing system, it can be judged from the fluctuation of vacuum degree. ( ) 10. The operation mode of the environmental management system is similar to the operation mode of other management, and they both follow the PDCA operation mode and there is no difference. ( ) Single-choice questions plus true-false questions, 10 questions every day, and one fortune will be awarded for each correct answer. illustrate: The answers will be announced at least 16 hours later, and scores will be given after the answers are published. After the answers are published, those who respond again will not be scored. Reference answer: BDBDB False True False False