Refining Knowledge (Technology) Daily Question (95) 12.29

Thread Content

We welcome everyone to actively participate in the learning and discussion of professional basic knowledge in the refining technology exchange area! In accordance with the forum’s uniform requirements, the maximum score for this activity is 10 Wealth points, and rating charm is prohibited. At the same time, friendship requests and repeated ratings are declined. Please be cautious when posting; edits will not be valid! Those who have different opinions on the provided answer keys can post discussions the next day, and those who provide solutions or their own opinions regarding the daily question’s answer key 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 H9 Q8 x: O/ {9 e: F Note: Urgent call for contributors to provide a daily question on refining knowledge (technology). Thread address: http://bbs.hcbbs.com/thread-553526-1-1.html We look forward to active participation from those who are willing to answer the questions! I. Multiple-choice questions 1. The reason for preheating a hot oil pump is the medium being transported ( ). A Low temperature, high viscosity B High temperature, high viscosity C High temperature, low viscosity D Low temperature, low viscosity 2. The operation of the coking drum in a catalytic cracking unit belongs to （ ） fluidization. A Rapid bed B Transport bed C Bubble bed D Turbulent bed 3. Which of the following is not a characteristic of chemical engineering equipment structure? A. Their shape is mainly that of rotational bodies. B. There are many openings and pipe ends on the shell. C. Non-metallic materials are mostly used. D. The structural dimensions of various parts vary greatly. 4. The solid content determination method can be used to measure the content of （） in the reprocessed oil slurry. A. Actual gum B. Gum and asphaltenes C. Catalyst D. Catalyst and gum 5. Which of the following is not a pressure compressor protection device? ( ) A. Emergency safety device B. Low oil pressure protection device C. Axial displacement protection device D. Backflow control device II. True or False questions. 6. Increasing the carbon content in the regenerator leads to reduced selectivity and a decrease in gasoline yield. ( ) 7. The biggest drawback of tongue-shaped trays is that they tend to leak downward through the tongue holes at low load levels, which reduces the efficiency of the tray. （ ） 8. Negative pressure operation can prevent toxic and explosive gases in the system from escaping. （ ） 9. As required, the air leakage rate of the steam trap should