Refining Knowledge (Technology): Question of the Day 110223

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Everyone is welcome to actively participate in the learning and discussion of fundamental professional knowledge in the Oil Refining and Processing Technology Exchange Area! In accordance with the forum’s unified requirements, the maximum score for this event is 5 Wealth points; scoring for Charm is prohibited. At the same time, friendship and duplicate ratings are not accepted. Post with caution; editing is ineffective. Those who have different opinions regarding the provided reference answers may post their thoughts the next day for discussion. Appropriate rewards will be given to those who provide solutions or personal opinions regarding the daily question’s reference answer! The emphasis is on participation; there are rewards for participating. 1. Distillation is a ( ) mass transfer process. 2 @# j/ h$ X# {( H( }. A. Unidirectional B. Bidirectional C. Multidirectional D. All of the above; |4 n+ s1 N& L. X/ ^' F0 d 2. Superheated gas refers to gas whose temperature is higher than its ( ). A. Bubble point B. Dew point C. Boiling point D. Freezing point 3. The force exerted by a fluid perpendicularly on a unit area of an object is called ( ). 5. z k1 i, K2 C7 L/ s5 ?* G A. Pressure B. Stress C. Unit force D. None of the above 4. The temperature at which a solid turns into a liquid is called the substance’s ( ). A. Boiling point B. Freezing point C. Melting point D. Flash point) a5 u: a% d1 g6 V4 K6 C m. m 5. In hydrogenated sulfur-containing wastewater, there are mainly the following pollutants: A. Oil B. Sodium sulfide C. Volatile phenols D. Mercaptans Reference answer: B ； B ； B ； C ； C