Refining Knowledge (Technology) Daily Question (179) 4.3

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We welcome everyone 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 event is 10 Wealth points, and rating charm is prohibited. At the same time, friendship requests and duplicate 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 I. Multiple-choice questions: 1. The content of naphthenic acids in crude oil can be expressed by the value of crude oil’s _____. (1) Sulfur content (2) Salt content (3) Acid value (4) pH value. 2. The saturated vapor pressure depends on the properties of the substance and ___. (1) Density (2) Quantity (3) Temperature (4) State. 3. When there is insufficient heat source in the stabilizer, in order to maintain an appropriate vapor pressure of gasoline, it is necessary to _____ the pressure in the stabilizer. (1) Increase (2) Decrease (3) No change 4. What reflects changes in thermal equilibrium most sensitively is _____. (1) Top temperature of the tower (2) Temperature at the first intermediate extraction point (3) Bottom temperature of the tower (4) Temperature at the second intermediate extraction point. 5. If a centrifugal pump operates for an extended period of time with the outlet valve closed, then the _____ phenomenon will occur. (1) The outlet pressure is increasing continuously. (2) The motor current is overloaded. (3) The pump temperature is too high. (4) No abnormal phenomena detected. II. True or False Questions: 6. The temperature of the flue gas at the flue gas distribution box before it enters the convection chamber from the radiation chamber is called the baffle wall temperature. ( ) 7. The pressure drop across the furnace tubes in a heating furnace is an important indicator of the degree of coking in those tubes. ( ) 8. In a atmospheric pressure tower, two-stage condensation is used; the condenser in the first stage can essentially be considered as one theoretical tray. ( ) 9. If the gas pressure is normal, and the feed rates to various sections of the atmospheric pressure furnace are equal, as well as the temperature in the furnace chamber, then the exit temperatures of each section will definitely be equal. ( ) 10. Reduced distillate oil can be sent to the third output line of the plant. ( ) Answers: 34213 ×√√×√