Refining Knowledge (Technology) Daily Question (160) 3.15
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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 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 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. Quality management should be centered around _____. A. Management B. Quality C. Variety D. Brand 2. Among the following gases, the one with a smell similar to rotten eggs is ______. A. CO B. N2 C. NH3 D. H2S 3. In total quality management, the steps of the PDCA cycle follow the sequence in ______. A. Implement—Inspect—Plan—Summarize B. Plan—Implement—Inspect—Summarize C. Inspect—Implement—Summarize—Plan 4. Among the methods for separating oil products, which one has the highest precision of separation? _____ A. Enthalpy distillation B. True boiling point distillation C. Equilibrium vaporization 5. If the temperature at the top of the fractionation tower remains constant and the vapor pressure of the oil-gas mixture decreases, then the dry point of gasoline ______. A. Rising B. Falling C. Unchanged D. Falling or unchanged II. True or False: 6. The 50% distillation temperature of gasoline indicates its starting performance at low temperatures. （ ） 7. Straight-run gasoline has a short induction period. ( ) 8. Increasing the number of baffle plates in a floating-head heat exchanger can improve the flow velocity and turbulence level of the fluid in the shell side. （ ） 9. The choice between air-open and air-close operation for control valves is primarily based on considerations related to safe production. （ ） 10. The degree to which the gas-liquid phase is deviated from phase equilibrium is the driving force for distillation mass transfer; the greater the degree of deviation, the greater the driving force. ( ) Reference answer: BDBBA ××√√√
ADBCA True False True True False
My answer is ADCBA, wrong wrong right right right
BDBCA ××√√√
ADBAB wrong right right wrong
bdbcb wrong wrong wrong wrong right
adcba wrong wrong right right right
A D B B B X V V V X
I. Single-choice questions: 1. Quality management should be centered around ___B__. A. Management B. Quality C. Variety D. Brand 2. Among the following gases, the one with a smell similar to rotten eggs is ___D__. A. CO B. N2 C. NH3 D. H2S 3. In total quality management, the steps of the PDCA cycle follow the order ___B__. A. Implement—Inspect—Plan—Summarize B. Plan—Implement—Inspect—Summarize C. Inspect—Implement—Summarize—Plan 4. Among the methods for separating oil products, the one with the highest precision of separation is __A___. A. Enthalpic distillation B. Actual boiling point distillation C. Equilibrium vaporization 5. If the temperature at the top of the fractionation tower remains constant and the vapor pressure of the oil mixture decreases, then the dry point of gasoline ___B__. A. Rising B. Falling C. Unchanged D. Falling or unchanged II. True or False: 6. The 50% distillation temperature of gasoline indicates its starting performance at low temperatures. (Yes) 7. Straight-run gasoline has a short induction period. (Correct) 8. Increasing the number of baffle plates in a floating-head heat exchanger can improve the flow velocity and turbulence level of the fluid in the shell side. (Yes) 9. The choice between air-open and air-close for control valves is primarily based on considerations of safe production. (Correct) 10. The degree to which the gas-liquid phase deviates from phase equilibrium is the driving force for distillation mass transfer; the greater the degree of deviation, the greater the driving force. (Correct)
ADBBB VVVXX
A, D, B, B, B ×, ×, ×, √, √