【Test Your Knowledge】Basic Chemical Engineering Knowledge (6)
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Just write down the answers directly: 1. During fluid flow, the volume of fluid that passes through a conduit per unit time is called _______________, and its unit is ___________________. 2. The main components of a centrifugal pump are _________, __________, __________. 3. The type of fire that cannot be extinguished with a carbon dioxide fire extinguisher is ________. A. Precision instruments B. Electrical equipment C. Metal oxides D. Books and archives 4. The most authoritative evaluator of product quality should be ________. A. Authority for product evaluation B. Factory manager C. Operator D. User 5. In environmental monitoring, COD stands for ________. A. Biochemical oxygen demand B. Chemical oxygen demand C. Air purity D. Noise level. Answer key: 1. Volumetric flow rate at any cross-section, in m3/s or m3/h. 2. Impeller, pump casing, shaft seal device. 3. C ； 4.D 5.B Did you get it right? This post was last edited by zhangyong6404 on 2009-3-20 17:51.]
1. Cross-sectional area, flow rate, volume per time (m³/h, l/s, etc.) 2. Pump body, impeller, pump shaft 3. C 4. D 5. A. Haha, not sure if it’s correct
1. Cross-sectional area, flow rate, volume per time (m³/h, l/s, etc.) 2. Pump body, impeller, pump shaft 3. C 4. D 5. A
1. Cross-section, volumetric flow rate, in cubic meters per hour or liters per second. 2. Pump body, impeller, pump shaft. 3. C 4. D 5. B
1. During fluid flow, the volume of fluid that passes through the cross-section of a conduit per unit of time is called volumetric flow rate, and its unit is m3/s. 2. The main components of a centrifugal pump are the impeller and the pump casing; there is also the pump shaft. 3. Carbon dioxide fire extinguishers cannot be used to extinguish fires involving metal oxides. 4. The most authoritative evaluators of product quality should be the users. 5. In environmental monitoring, COD stands for chemical oxygen demand---
1. Cross-section, volumetric flow rate: m³/h, l/s 2. Pump body, impeller, pump shaft 3. C 4. D 5. B
1 Cross-sectional area, flow rate, volume per time (m³/h, l/s, etc.) 2 Pump body, impeller, pump shaft 3 C 4 D 5 A
1. Cross-sectional area, flow rate, volume per time (m³/h, l/s, etc.)； 2. Pump body, impeller, pump shaft ； 3、C ； 4、D ； 5. A.
1. Cross-sectional area, flow rate, volumetric flow rate (m³/h, l/s, etc.)； 2. Pump body, impeller, shaft sealing device 3. C ； 4、A ； 5. A.
1. Cross-section, volumetric flow rate, in cubic meters per hour or liters per second. 2. Impeller, pump casing, and shaft sealing device. 3. C 4. D 5. B
1. During fluid flow, the volume of fluid that passes through the cross-sectional area of a conduit per unit of time is called the **volumetric flow rate**; its unit is **m^3/s**. 2. The main components of a centrifugal pump are __impeller_______, ___casing_______, and __shaft seal________. 3. The type of fire that cannot be extinguished with a carbon dioxide fire extinguisher is __C______. A. Precision instruments B. Electrical equipment C. Metal oxides D. Books and archives 4. The most authoritative evaluator of product quality should be ___D______. A. Authority for product evaluation B. Factory manager C. Operator D. User 5. In environmental monitoring, COD stands for ___B______. A. Biochemical oxygen demand B. Chemical oxygen demand C. Air purity D. Noise intensity
1. Cross-section, volumetric flow rate: cubic meters per hour or liters per second. 2. Impeller, pump casing, and shaft sealing device. 3. C 4. D 5. C
1. Cross-section, volumetric flow rate: cubic meters per hour or liters per second. 2. Impeller, pump casing, and shaft sealing device. 3. C 4. D 5. B Chemical Oxygen Demand (COD) refers to the amount of oxidizing agent consumed when a water sample is treated with a certain strong oxidizer under specific conditions. It is an indicator of the amount of reducing substances in water. Such posts are really great!
1. Cross-section, flow rate, m³/h, l/s 2. Impeller, pump casing, and shaft sealing device 3. ABC 4. D 5. B Haha, give it a try
1. During fluid flow, the volume of fluid that passes through a cross-sectional area _____ of a conduit per unit of time is called the ______ volume flow rate _______, and its unit is ____ cubic meters per hour or liters per second ___________. 2. The main components of a centrifugal pump are the _impeller________, the ___pump shaft_______, the __pump casing_, and the shaft seal device______. 3. The type of fire that cannot be extinguished with a carbon dioxide fire extinguisher is ___C_____ . A. Precision instruments B. Electrical equipment C. Metal oxides D. Books and archives 4. The most authoritative evaluator of product quality should be ____D____. A. Authority for product evaluation B. Factory manager C. Operator D. User 5. In environmental monitoring, COD stands for ____B____. A. Biochemical oxygen demand B. Chemical oxygen demand C. Air purity D. Noise intensity
4. The most authoritative evaluator of product quality should be ____A____. A. An authority in product evaluation B. Plant manager C. Operator D. User. It should be A, right: handshake
1 Cross-sectional area, flow rate, volume per time (m³/h, l/s, etc.) 2 Pump body, impeller, pump shaft 3 C 4 D 5 B Last edited by brainandrain on 2009-3-20 13:12]
1 Cross-sectional area, volumetric flow rate in m³/h 2 Impeller, pump casing, shaft seal device 3 C 4 D 5 B
1. Cross-sectional area, volumetric flow rate: m³/h, l/s 2. Impeller, pump casing, and shaft sealing device 3. C 4. C 5. B
1. Cross-sectional area, volumetric flow rate, volume per unit time (usually in m³/hr) 2. Impeller, pump casing, shaft seal 3. C 4. D 5. B
1. Cross-sectional area, volumetric flow rate in m³/h or l/s, etc. 2. Pump body, impeller, pump shaft 3. C 4. D 5. B