【Test Your Knowledge】Basic Chemical Engineering Knowledge (15)
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1. Sulfuric acid is one of the three strong acids; concentrated sulfuric acid possesses strong ______, ________, and ______. 2. The three major synthetic materials produced in the petrochemical industry are ______, ______, and _______. 3. Inside the heat exchanger, the material can be ________ or ______, and it can also be ______ or ___________. 4. The calomel electrode usually uses _______________________________ as the salt bridge. 5. If the vacuum level of the vacuum pump is 600 mmHg, it corresponds to ____ Kpa and ____ kg/cm2. True or False Question 6: Equipment is the material basis for production, and lubrication is a necessary condition for its operation. ( ) 7. φ25×2.5B, where B denotes the material, 2.5 represents the wall thickness, and 25 indicates the outer diameter of the tube. ( ) 8. To use a foam fire extinguisher, shake it slightly, turn on the switch, and the agent will be sprayed out. （ ） 9. A decrease in the waste rate indicates an improvement in work quality. ( ) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. ( ) Answer key: 1. Water absorption, water loss, oxidizing property 2. Synthetic rubber, synthetic plastic, synthetic fiber 3. Heating, cooling, boiling, condensation 4. Saturated potassium chloride solution 5. 80.44, 0.82 6. Correct ； 7. Wrong ； 8. Wrong ； 9. Yes ； 10. Wrong ； Did you get it right? This post was last edited by zhangyong6404 on 2009-3-29 16:30.]
1. Strong oxidizing properties, dehydrating properties, water-absorbing properties 2. Plastics, synthetic rubbers, and synthetic fibers
1. Sulfuric acid is one of the three strong acids; concentrated sulfuric acid possesses strong oxidizing properties, _dehydrating properties, and hygroscopicity. 2. The three major synthetic materials produced in the petrochemical industry are _plastics_, _synthetic fibers_, and _synthetic rubber_. 3. Inside the heat exchanger, the material can undergo _heat absorption_ or _heat release_, and it can also be _heated_ or _cooled_. 4. The calomel electrode usually uses _______________________________ as the salt bridge. 5. If the vacuum level of the vacuum pump is 600 mmHg, it corresponds to ____ Kpa and ____ kg/cm2. True or False Question 7: φ25×2.5B, where B denotes the material, 2.5 represents the wall thickness, and 25 indicates the outer diameter of the pipe. ( √ ) 8. To use a foam fire extinguisher, shake it slightly, turn on the switch, and the agent will be discharged. ( × ) 9. A decrease in the scrap rate indicates an improvement in work quality. ( × ) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. ( × ) Last edited by rongdragon on 2009-3-28 18:05 ]
1. Water absorption, strong oxidizing property, dehydrating property 2. Specified plastics, synthetic rubbers, and synthetic fibers 3. Heating, cooling, condensation, vaporization 4. Saturated potassium chloride solution 5. 600/760*100, 600/760 6. × 7. √ 8. × 9. × 10. × Last edited by wysup on 2009-3-28 18:33 ]
1. Water absorption, dehydration, oxidizing properties 2. Synthetic resins and plastics, synthetic rubbers, synthetic fibers 3. Heating, cooling, boiling, condensation 4. Electrolytes such as KCl, NH4Cl, KNO3 5. 79.97 KPa (vacuum level), 0.816 kg/cm2 (vacuum level) 6. √ 7. × 8. × 9. √ 10×
1. Water absorption, dehydration, and oxidizing properties. 2. Synthetic resins, synthetic fibers, synthetic rubbers. 3. Heating, cooling, vaporization, condensation. 4. Saturated potassium chloride solution. 5,600/7.6, 600/760. True or False: 6. False 7. True 8. False 9. False 10. False
1. Sulfuric acid is one of the three strong acids; concentrated sulfuric acid possesses strong oxidizing, dehydrating, and hygroscopic properties. 2. The three major synthetic materials produced in the petrochemical industry are (plastics, synthetic fibers, and synthetic rubber). 3. Inside the heat exchanger, the material can be (heated) or (cooled), and it can also be (condensed) or (evaporated). 4. Calomel electrodes typically use electrolytes such as (KCl, NH4Cl, KNO3, etc.) as salt bridges. 5. If the vacuum level of the vacuum pump is 600 mmHg, it corresponds to (79.97) Kpa and (0.789) kg/cm2. True or False Question 6: Equipment is the material basis for production, and lubrication is a necessary condition for its operation. ( √ ) 7. φ25×2.5B, where B denotes the material, 2.5 represents the wall thickness, and 25 indicates the outer diameter of the tube. (×) 8. To use a foam fire extinguisher, shake it slightly, turn on the switch, and the agent will be sprayed out. ( × ) 9. A decrease in the scrap rate indicates an improvement in work quality. ( × ) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. ( × )
1. Sulfuric acid is one of the three strong acids; concentrated sulfuric acid has a strong ___water-absorbing capacity___, __oxidizing property____, and ______. 2. The three major synthetic materials produced in the petrochemical industry are ______, ______, and _______. 3. Inside the heat exchanger, the material can be ___heated_____ or __cooled____, and it can also be ______ or ___________. 4. The calomel electrode usually uses a ________saturated potassium chloride solution_____________________ as the salt bridge. 5. If the vacuum level of the vacuum pump is 600 mmHg, then it corresponds to __600/760*101.325__ Kpa and __600/760__ kg/cm2. True or False Question 6: Equipment is the material basis for production, and lubrication is a necessary condition for its operation. (Correct) 7. φ25×2.5B, where B denotes the material, 2.5 represents the wall thickness, and 25 indicates the outer diameter of the tube. (Incorrect) 8. The method of using a foam fire extinguisher is to shake it slightly, turn on the switch, and the agent will be sprayed out. (Incorrect) 9. A decrease in the waste rate indicates an improvement in work quality. (Incorrect) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. (Correct)
1. Water absorption, dehydration, and oxidizing properties. 2. Synthetic resins, synthetic fibers, synthetic rubbers. 3. Heating, cooling, vaporization, condensation. 4. Saturated potassium chloride solution. 5,600/7.6, 600/760. 6、Wrong 7、Right 8、Wrong 9、Wrong 10、Wrong
1. Water absorption, water loss, strong oxidizing property 2. Synthetic plastics, synthetic fibers, synthetic rubbers 3. Heating, cooling, vaporization, condensation 4. Saturated KC solution 5. 21.3, 0.21 True or False questions 6. True 7. False 8. False 9. True 10. True
1. Water absorption, dehydration, oxidizing properties 2. Synthetic resins and plastics, synthetic rubbers, synthetic fibers 3. Heating, cooling, boiling, condensation 4. KCl solution 5. 79.97, 0.816 6. √ 7. × 8. × 9. √ 10×
Oxidizing property, dehydrating property, water-absorbing property; plastics, synthetic rubbers, synthetic fibers; heating, cooling, condensation, vaporization; saturated potassium chloride solution: 78.9, 0.816 √ × × × ×
1. Sulfuric acid is one of the three strong acids; concentrated sulfuric acid possesses strong oxidizing, dehydrating, and hygroscopic properties. 2. The three major synthetic materials produced in the petrochemical industry are (plastics, synthetic fibers, and synthetic rubber). 3. Inside the heat exchanger, the material can be (heated) or (cooled), and it can also be (condensed) or (evaporated). 4. Calomel electrodes typically use electrolytes such as (KCl, NH4Cl, KNO3, etc.) as salt bridges. 5. If the vacuum level of the vacuum pump is 600 mmHg, it corresponds to (79.97) Kpa and (0.789) kg/cm2. True or False Question 6: Equipment is the material basis for production, and lubrication is a necessary condition for its operation. ( √ ) 7. φ25×2.5B, where B denotes the material, 2.5 represents the wall thickness, and 25 indicates the outer diameter of the tube. (×) 8. To use a foam fire extinguisher, shake it slightly, turn on the switch, and the agent will be sprayed out. ( × ) 9. A decrease in the scrap rate indicates an improvement in work quality. ( × ) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. ( × )
1. Sulfuric acid is one of the three strong acids; concentrated sulfuric acid possesses strong __corrosive__ properties, __dehydrating__ properties, and __acidic__ properties. 2. The three major synthetic materials produced in the petrochemical industry are __synthetic plastics__, _synthetic fibers_, and ___synthetic rubber___. 3. Inside the heat exchanger, the material can be ___heated_____ or __cooled____, and it can also be ___condensed___ or ____evaporated____. 4. The calomel electrode typically uses _________saturated potassium chloride____________________ as the salt bridge. 5. If the vacuum level of the vacuum pump is 600 mmHg, it corresponds to __80__ Kpa and __0.8__ kg/cm2. True or False Question 6: Equipment is the material basis for production, and lubrication is a necessary condition for its operation. (T) 7, φ25×2.5B, where B denotes the material, 2.5 represents the wall thickness, and 25 indicates the outer diameter of the tube. (F) 8. To use a foam fire extinguisher, shake it slightly, turn on the switch, and the agent will be sprayed out. (F) 9. A decrease in the scrap rate indicates an improvement in work quality. (T) 10. Thermal load refers to the heat exchange capacity inherent in the heat exchanger itself. ( T )
1. Sulfuric acid is one of the three strong acids; concentrated sulfuric acid possesses strong oxidizing, dehydrating, and hygroscopic properties. 2. The three major synthetic materials produced in the petrochemical industry are: plastics, synthetic fibers, and synthetic rubber. 3. Inside the heat exchanger, the material can be (heated) or (cooled), and it can also be (condensed) or (evaporated). 4. The calomel electrode usually uses a salt bridge (made of KCl solution). 5. If the vacuum level of the vacuum pump is 600 mmHg, it corresponds to (600/7.6) Kpa and (600/7.6/98.1) kg/cm2. True or False Question 6: Equipment is the material basis for production, and lubrication is a necessary condition for its operation. For 7, φ25×2.5B, where B denotes the material, 2.5 represents the wall thickness, and 25 indicates the outer diameter of the tube. Wrong 8: To use a foam fire extinguisher, simply shake it slightly, turn on the switch, and the agent will be discharged. Wrong 9: A decrease in the waste rate indicates an improvement in work quality. Wrong 10: The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. Wrong
1. Sulfuric acid is one of the three strong acids; concentrated sulfuric acid possesses strong oxidizing, dehydrating, and hygroscopic properties. 2. The three major synthetic materials produced in the petrochemical industry are (plastics, synthetic fibers, and synthetic rubber). 3. Inside the heat exchanger, the material can be (heated) or (cooled), and it can also be (condensed) or (evaporated). 4. Calomel electrodes typically use electrolytes such as (KCl, NH4Cl, KNO3, etc.) as salt bridges. 5. If the vacuum level of the vacuum pump is 600 mmHg, it corresponds to (79.97) Kpa and (0.816) kg/cm2. True or False: 6. Equipment is the material basis for production, and lubrication is a necessary condition for its operation. ( √ ) 7. φ25×2.5B, where B denotes the material, 2.5 represents the wall thickness, and 25 indicates the outer diameter of the tube. (×) 8. To use a foam fire extinguisher, shake it slightly, turn on the switch, and the agent will be sprayed out. ( × ) 9. A decrease in the scrap rate indicates an improvement in work quality. ( √ ) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. ( × )
1. Water absorption, dehydration, and oxidizing properties. 2. Synthetic resins, synthetic fibers, synthetic rubbers. 3. Heating, cooling, vaporization, condensation. 4. Saturated potassium chloride solution. 5,600/7.6, 600/760. 6、True 7、False 8、False 9、False 10、False
1. Oxidizing property, dehydrating property, water-absorbing property. 2. Plastics, synthetic fibers, and synthetic rubbers 3. Heating, cooling, condensation, vaporization 4. 3N potassium chloride solution 5. 600/760*100, 600/760 6. Yes 7. Yes 8. No 9. No 10. No
1. Oxidizing property, water absorption, corrosiveness 2. Plastics, synthetic rubbers, synthetic fibers 3. Heating, cooling, condensation, evaporation 4. Saturated potassium chloride solution 5. 7.8.9, 0.789 1. True 2. False 3. False 4. False 5. True
1. Water absorption, dehydration, oxidizing properties 2. Synthetic resins and plastics, synthetic rubbers, synthetic fibers 3. Heating, cooling, boiling, condensation 4. Electrolytes such as KCl, NH4Cl, KNO3 5. 79.97 KPa (vacuum level), 0.816 kg/cm2 (vacuum level) 6. × 7. √ 8. × 9. , × 10×
1. Water absorption, dehydration, and oxidizing properties. 2. Synthetic resins, synthetic fibers, synthetic rubbers. 3. Heating, cooling, evaporation, condensation. 4. Saturated potassium chloride solution. 5, 79.97 KPa (vacuum level), 0.816 kg/cm2 (vacuum level). True or False: 6. False 7. True 8. False 9. False 10. False