【Test Your Knowledge】Basic Chemical Engineering Knowledge (8)
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Write the answer directly. 1. Pressure distillation is commonly used to separate mixtures whose boiling points are relatively ________. A. High B. Low C. Far D. Near 2. Cooling refers to the phenomenon in which the cold medium does not undergo ________ while removing heat, but only experiences a change in temperature. A. Phase change B. Pressure change C. Concentration change D. Qualitative change 3. The main principle for selecting the operating pressure of a distillation column is ________. A. The relative volatility of key components under different pressures; B. The economic viability of the coolant at the top of the tower and the heating medium at the bottom of the tower; C. The pressure specified by safety regulations; D. The magnitude of the pressure drop in the tower. 4. Free radicals are electron-bearing groups that are generated as a result of ________ reactions occurring in covalent compound under certain external conditions. A. Thermal cracking B. Homolytic cleavage C. Splitting D. Fission 5. The diagram that shows the relationship between quality characteristics and their causes is ________. A. Pareto chart B. Scatter plot C. Cause-and-effect diagram D. Control chart 6. In a polymer molecular chain, the number of repeating units is called ________. A. Number of molecules B. Degree of polymerization C. Number of chain segments D. Degree of branching Answer: 1.B ； 2.A ； 3.B ； 4.B ； 5.C ； 6.C Did you get it right? This post was last edited by zhangyong6404 on 2009-3-22 19:37.]
1.D 2.D 3.A 4.B 5.I’m not sure what area of knowledge this relates to. 6.B
1.B (low boiling point) 2.C (concentration change) 3.B (economic feasibility of the refrigerant at the top of the tower and the heating medium at the bottom) 4.B (homolysis) 5.C (cause-and-effect diagram) 4.B (degree of polymerization) Last edited by jin9090900 on 2009-3-21 23:38]
I wonder if it is: B A B A C B
B.A.A.B.C.B – I’m a bit rusty on my chemical engineering knowledge, so I’m not entirely sure; I’ll keep paying attention to get the correct result
B A A C C B
B D B A C B
I originally studied *Engineering Management with the intention of finding a job in civil construction, but ended up working in the chemical industry on construction projects. There are so many things I don’t understand. If I try to learn, there’s too much content and it’s difficult to find relevant materials; if I don’t learn, I can’t just wait for death. Studying + exhaustion = tears
B A B? A? ? B
B A B B C B
B C A B B B
Based on what I know from before, let’s see how many I can get right: 1 B, 2 D, 3 A, 4 C, 5 C. I still need to learn more*
B B D D C B, what’s the answer?
1B,2A,3B,4B.5,C,6C
1.B 2. D 3.A 4.B 5.D 6.B
1.B 2. D 3.A 4.B 5.D 6.B isn’t necessarily correct; when will the original poster provide the answers?
Write the answer directly. 1. Pressure distillation is commonly used to separate mixtures when their boiling points are relatively ____D____. A. High B. Low C. Far D. Near 2. Cooling refers to the phenomenon in which the cold medium does not undergo ___A_____ while removing heat, but only experiences a change in temperature. A. Phase change B. Pressure change C. Concentration change D. Qualitative change 3. The main principle for selecting the operating pressure of a distillation column is __A__. A. The relative volatility of key components under different pressures; B. The economic feasibility of using a coolant at the top of the tower and a heating medium at the bottom of the tower; C. The pressure specified by safety regulations; D. The magnitude of the pressure drop in the tower. 4. Free radicals are electron-bearing groups that are generated as a result of ____D____ reactions occurring in covalent compound under certain external conditions. A. Thermal cracking B. Homolytic cleavage C. Splitting D. Fission 5. The diagram that shows the relationship between quality characteristics and their causes is ___C______. A. Pareto chart B. Scatter plot C. Cause-and-effect diagram D. Control chart 6. In a polymer molecular chain, the number of repeating units is called ____B____. A. Number of molecules B. Degree of polymerization C. Number of chain segments D. Degree of branching
This section is quite interesting; let’s give it a try: D A A B C B
C A A B C B
1.B 2.C 3.B 4.B 5.C 6.B
C A A B C B