Refining Knowledge (Technology) Daily Question (150) 3.5

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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. 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 it! 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. Single-choice questions: 1. Vaporization generally leads to ______. (1) Endothermic (2) Exothermic (3) Neither endothermic nor exothermic. 2. The flow measurement orifice plate is generally installed at the _____ of the flow control valve. (1) Front (2) Back (3) Either front or back. 3. The amount of fluid that passes through any cross-section of a pipe per unit of time is called the fluid’s ______. (1) Weight (2) Flow rate (3) Volume flow rate. 4. If the crude oil contains water, the bottom temperature of the distillation tower ______. (1) Rising (2) Falling (3) Unchanged (4) Not necessarily. 5. The cross-line connection between the recycle oil buffer tank and the feedstock buffer tank in a catalytic cracking unit serves the purpose of ______. (1) Balance pressure (2) Level of the feed oil buffer tank (3) Level of the refining buffer tank. II. True or False: 6. The flash point of light diesel is higher than that of gasoline. （ ） 7. Gas absorption is a mass transfer process. （ ） 8. The pressure drop of a tongue-shaped tray is greater than that of a floating valve tray. （ ） 9. The catalytic stabilization system relies on natural pressure to drain the oil during shutdown; therefore, the system pressure must be maintained before draining the oil. ( ) 10. Increasing the number of baffle plates in a floating-head heat exchanger can enhance the flow velocity and turbulence of the fluid in the shell side. ( )