Refining Knowledge (Technology) Daily Question (83) 12.17

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This post was last edited by chengkang on 2009-12-18 23:04. 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 event is 10 Wealth points, and rating charm is prohibited. Friendship requests 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 H9 Q8 x: O/ {9 e: F Note: Daily questions on refining knowledge (technology) are being urgently sought; question creators can be found at: http://bbs.hcbbs.com/thread-553526-1-1.html We hope participants will engage actively! Multiple-choice question 1. Increasing the ( ) of the shift reaction can improve the conversion rate. A: Pressure B: Temperature C: Water-to-carbon ratio. 2. The types of regulators used in hydrogen production units are positive and negative acting; as for whether the control valves are air-operated or spring-operated, this is determined based on ( ). A: Regulator function B: Process requirements C: Structure of the control valve 3. The catalyst is in its initial state ( ). A: Participates in the reaction B: Does not participate in the reaction C: Does not affect the reaction rate. 4. The zinc oxide desulfurization reaction is a （ ） phase catalyzed reaction. A: Solid-solid B: Liquid-solid C: Gas-solid 5. Increasing the ( ) energy of the conversion reaction accelerates the rate of that reaction. A: Hydrogen concentration B: Pressure C: Carbon dioxide concentration 6. The thermometer that uses the property of liquid expansion to measure temperature is ( ). A: Gauge-type thermometer B: Mercury thermometer C: Thermocouple 7. In the gas state equation PV=nRT, V represents ( ). A: Space velocity B: Volume C: Speed 8. A pressure gauge with a range of 5.0 MPa and an accuracy of 1.0 has a measurement error of ( ). A: ±0.05 MPa B: ±0.1 MPa C: ±0.005 MPa 9. For safety and to improve the accuracy of pressure measurements, the normal pressure value should be at ( ) of the gauge’s range. A: 1/2 B: 3/4 C: 2/3 10. The flue gases from the converter are exhausted using exhaust fans; therefore, it is necessary to maintain a negative pressure in the furnace chamber between –5 and –10 mm of water column. This negative pressure refers to ( ) negative pressure. A: Upper part B: Lower part C: Middle part Answer: C B A C B B B A C A