【Test Your Knowledge】Basic Chemical Engineering Knowledge (18)
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1. The method for determining hydrogen ion concentration (pH) is ________. A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; what is this safe voltage? ________ A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is ________. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are measures used to assess the quality of work as well as the quality of ________. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the ______ method is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 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. ( ) Reference answer: 1.A ； 2.C ； 3.D ； 4.B ； 5.A ； 6. Yes ； 7. Wrong ； 8. Wrong ； 9. Yes ； 10. Wrong. Did you get it right? It’s been repeated, and most people are still wrong, haha. This post was last edited by zhangyong6404 on 2009-4-1 13:17.]
1. The method for measuring hydrogen ion concentration (pH) is __C_______. A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ____C____. A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is ___B______. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are criteria for measuring work quality and the quality of ___B_____ as well. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the ___A, D___ methods is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 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. (F) This post was last edited by 10105 on 2009-3-31 17:16]
1. The method for measuring hydrogen ion concentration (pH) is __A______. A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ____B____. A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is ___B______. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are criteria for measuring work quality and the quality of ___B_____ as well. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the ___A, D___ methods is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 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. (F) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. (F)
1、C 2、C 3、D 4、B 5、A 6、√ 7、× 8、× 9、√ 10、×
1. The method for measuring hydrogen ion concentration (pH) is __A__. 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ____A____. 3. The unit system commonly used in engineering in our country is ___B______. 4. In enterprises, standards are the measures used to assess the quality of work as well as the quality of ___B______. 5. For the same component in a certain gas, using the ___A and D___ methods is beneficial for condensation. 6. Equipment is the material basis for production, and lubrication is a necessary condition for its operation. (Yes) 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. To use a foam fire extinguisher, simply 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. (Yes) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. ( Wrong )
1. The method for measuring hydrogen ion concentration (pH) is ___C______. A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ___C______. A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is __B______. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are measures used to assess the quality of work as well as the quality of ____B____. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the __A____ method is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 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. (F) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. (F )
1. The method for measuring hydrogen ion concentration (pH) is __A______. A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ____B____. A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is ___B______. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are criteria for measuring work quality and the quality of ___B_____ as well. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the ___A, D___ methods is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 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. (F) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. (F)
C A B B A Right Wrong Wrong Right Wrong
I think the answers are 1, C2, C3, D4, B5, A6, √7, ×8, ×9, √10,×
1. The method for measuring hydrogen ion concentration (pH) is _____A___. A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or electric tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is __C______. A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is ____B____. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are measures used to assess the quality of work as well as the quality of __B_______. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the __A____ method is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 6. Equipment is the material basis for production, and lubrication is a necessary condition for its operation. (Yes) 7. φ25×2.5B, where B denotes the material, 2.5 represents the wall thickness, and 25 indicates the outer diameter of the tube. (Yes) 8. To use a foam fire extinguisher, shake it slightly, turn on the switch, and the agent will be discharged. (Incorrect) 9. A decrease in the waste rate indicates an improvement in work quality. (Yes) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. (Wrong)
1、A 2、B 3、D 4、B 5、B 6、Correct 7、Incorrect 8、Incorrect 9、Incorrect 10、Correct
1. The method for measuring hydrogen ion concentration (pH) is ___a_____ . A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ____c__. A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is ____d____. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are measures used to assess the quality of work as well as the quality of _____b___. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the ___a___ method is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 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. (t) 8. To use a foam fire extinguisher, shake it slightly, turn on the switch, and the agent will be discharged. (f) 9. A decrease in the scrap rate indicates an improvement in work quality. (f) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. ( t )
C A D B A,D √ × × √ ×
1. The method for measuring hydrogen ion concentration (pH) is ___C______. A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ____C__. A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is ____B____. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are measures used to assess the quality of work as well as the quality of _____B___. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the ___a___ method is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 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. (T) 8. To use a foam fire extinguisher, shake it slightly, turn on the switch, and the agent will be discharged. (F) 9. A decrease in the scrap rate indicates an improvement in work quality. (F) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. (T) True/False: There was already a question like this before
1. The method for determining hydrogen ion concentration (pH) is __c_______. A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ____c____. A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is ___B______. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are criteria for measuring work quality and the quality of ___B_____ as well. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the ___A, D___ methods is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 6. Equipment is the material basis for production, and lubrication is a necessary condition for its operation. (Yes) 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. To use a foam fire extinguisher, simply shake it slightly, turn on the switch, and the agent will be sprayed out. (Incorrect) 9. A decrease in the scrap rate indicates an improvement in work quality. (Yes) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. (Mistake)
1、C 2、C 3、D 4、B 5、A 6、√ 7、× 8、× 9、√ 10、×
1. The method for measuring hydrogen ion concentration (pH) is __A__. 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ____A____. 3. The unit system commonly used in engineering in our country is ___B______. 4. In enterprises, standards are the measures used to assess the quality of work as well as the quality of ___B______. 5. For the same component in a certain gas, using the ___A and D___ methods is beneficial for condensation. 6. Equipment is the material basis for production, and lubrication is a necessary condition for its operation. (Yes) 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. To use a foam fire extinguisher, simply 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. (Yes) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. ( Wrong )
1、A 2、C 3、D 4、C 5、A、D 6、Correct 7、Incorrect 8、Incorrect 9、Incorrect 10、Incorrect
1. The method for measuring hydrogen ion concentration (pH) is ___C___. A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ____C____. A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is ____D____. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are measures used to assess the quality of work as well as the quality of ____B____. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the ___AD___ method is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 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. (T) 8. To use a foam fire extinguisher, shake it slightly, turn on the switch, and the agent will be discharged. (F) 9. A decrease in the scrap rate indicates an improvement in work quality. (F) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. (F )
1. The method for measuring hydrogen ion concentration (pH) is ___C______. A. Acid-base indicator method B. Calomel electrode method C. Glass electrode method D. Antimony electrode method 2. When working in humid environments, lighting or power tools must use a safe voltage in accordance with electrical safety regulations; this safe voltage is ___C______. A. 36V B. 24V C. 12V D. 6V 3. The unit system commonly used in engineering projects in our country is __B______. A. Physical unit system B. Engineering unit system C. Absolute unit system D. International unit system 4. In enterprises, standards are measures used to assess the quality of work as well as the quality of ____B____. A. Maintenance B. Products C. Inspection D. Equipment 5. For the same component in a certain gas, using the __A____ method is beneficial for condensation. A. Pressurization B. Depressurization C. Temperature increase D. Temperature decrease 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. (F) 10. The heat load refers to the heat exchange capacity inherent in the heat exchanger itself. (F )
1、C 2、C 3、D 4、B 5、A 6、√ 7、× 8、× 9、√ 10、×