Refining Knowledge (Technology) Daily Question (19) 10.11

Thread Content

This post was last edited by bingfeng1203 on 2009-10-11 23:09. 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 unified requirements, the maximum score for this activity is 10 Wealth points, and rating charm is prohibited. Friendships and duplicate ratings are also declined. Additionally, for answers using the same IP, only the first post is valid. Be careful when posting; editing is ineffective! Those who have different opinions on the provided answer keys can post discussions the next day; those who provide solutions or their own opinions regarding the answer key for the daily question will receive appropriate rewards! The focus is on participation, and there are prizes for participating! To prevent some members from copying 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 1. Multiple-choice questions. 1. For catalytic cracking industrial units, within what temperature range does deactivation begin to become severe? ______: A. Below 650°C B. 650–700°C C. Above 730°C D. Above 800°C 2. Which of the following methods for dealing with carbon buildup are not feasible? ______: A. Reducing the processing volume B. Increasing the main air flow rate C. Raising the reaction temperature D. Increasing the amount of stripping steam 3. The function of the inlet guide cone in the flue gas turbine is ( ). A. To ensure that the flue gas enters the guide vanes symmetrically and evenly B. To increase the resistance of the flue gas C. To reduce the catalyst concentration D. To increase the catalyst concentration 4. Material pipelines are generally laid with a slope of ( ). A 1/50 B 1/100 C 1/150 D 1/200 5. Under normal circumstances, a safety helmet can withstand the impact of a （ ） kg hammer falling from a height of 1 meter. A 2 B 3 C 4 D 5 II. True or False questions. 6. The main purpose of returning reprocessed oil to the tower is to prevent the trays from becoming \"dry\", and like other reflux streams, it also removes some heat. （ ） 7. For pressure testing the main air pipelines in catalytic reverse-reaction systems, pneumatic testing is generally used, while for pressure testing the oil pipelines in distillation systems, hydraulic testing is usually employed. ( ) 8. The operating range of a pressure gauge is usually between 1/3 and 1/2 of its full scale. ( ) 9. In the gearbox, the low-speed shaft is thicker than the high-speed shaft. ( ) 10. The rated current is the basis for determining whether a motor is operating under overload conditions. ( ) Note: Questions related to refining knowledge (technology) are collected on a daily basis; those interested in creating such questions can visit http://bbs.hcbbs.com/thread-553526-1-1.html. We encourage everyone to participate actively! Multiple-choice questions and true/false questions, 10 questions per day; 1 unit of wealth is awarded for each correct answer. Note: The answers will be released at least 16 hours later, and scoring will be given after the answers are disclosed. No further scoring will be conducted for those who respond after the answers have been released. Answer: CCACB Wrong Right Wrong Right Right