Refining Knowledge (Technology) Daily Question (97) 12.31

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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. Friendships and duplicate ratings are also declined. Please be cautious when posting; edits will not be effective! 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 refinery 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. ( ) is a main component of a gas compressor that does work on the gas, enabling it to gain energy. A Rotor B Stator C Impeller D Prime mover 2. The working principle of a thermal siphon reboiler is based on the ( ) of the medium at the inlet and outlet. A Concentration difference B Density difference C Height difference D Temperature difference 3. For a pneumatic diaphragm control valve, what should happen when the compressed air supply is interrupted? A. Shut down immediately B. Remain in place C. Turn on immediately D. Stop adjusting. 4. Poisoning caused by absorption through the skin and mucous membranes is ( ). A. H2S B. Hg C. Diethyl ether D. Isopropanol E. CO 5. The variation in CO content in the flue gas from a heating furnace as the amount of excess air changes is as follows: when the amount of excess air decreases, the CO content changes from ( ) to ( ); when the amount of excess air is high, the change in CO content is more ( ). Which of the following is appropriate? ( ) A. High, Low, Slow B. Low, High, Slow C. High, Low, Fast D. Low, High, Fast II. True or False questions. 6. In a high-speed fluidized bed, the density of the catalyst in the middle of the bed layer remains essentially constant regardless of height. （ ） 7. The regulation of the primary and secondary air in the auxiliary combustion chamber should not only meet the requirements of combustion but also ensure that the furnace temperature does not rise too much, as well as accommodate any changes in the temperature of the regenerator bed. ( ) 8. When taking samples of volatile, lightweight petroleum products, one should stand downwind. ( ) 9. Positive displacement pumps transport liquids by utilizing the periodic changes in the volume of the pump’s working chamber. ( ) 10. Most of the solids in the slurry are catalyst powder, along with particles of coke dust and other substances. ( )