【Test Your Knowledge】Basic Chemical Engineering Knowledge (12)
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1. The safe voltages for use with lanterns, as well as the power voltages for indicator lights, are ____, _____, ____ , ____. 2. The physical quantities that reflect the conditions during chemical production processes are: temperature, _________, _______, __________, __________. 3. In unit operations, distillation is used to separate ____________________, while absorption is used to separate ____________________. 4. Acid-base fire extinguishers contain a solution of NaHCO3 and dilute H2SO4; they can extinguish fires because the CO2 produced is non-flammable. Write the chemical equation for this reaction: ___________________________. 5. The polymerization reaction can generally be divided into three stages, namely _________, _________, and ________. 6. The safety accessories of pressure vessels include __________, __________, __________, _______________, and ___________. Answer key: 1. 36 volts, 24 volts, 12 volts, 6 volts. 2. Pressure, flow rate, pressure difference, liquid level. 3. Liquid mixture, gas mixture. 4. 2NaHCO3 + H2SO4 === Na2SO4 + 2CO2↑ + 2H2O. 5. Chain initiation, chain growth, chain termination. 6. Safety valve, explosion-proof plate, pressure gauge, level gauge, thermometer. Did you get them right? This post was last edited by zhangyong6404 on 2009-3-26 15:13.]
1. 36V 24V 12V 6V 2. Volume, pressure, flow rate, velocity 3. Liquid mixtures/compoounds, gas-liquid/gas-solid mixtures 4. H2SO4 + 2NaHCO3 → Na2SO4 + H2O + CO2 5. Chain initiation, chain growth, chain termination 6. Safety valves, burst discs, emergency shut-off devices, pressure gauges, level gauges
1.6V, 12V, 24V, 36V 2. Pressure, flow rate, level, composition (?) ) 3. Homogeneous liquid mixtures, gas mixtures 4.2 NaHCO3 + H2SO4 == Na2SO4 + 2H2O + 2CO2(g) 5. Chain initiation, chain growth, and chain termination 6. Safety valves, explosion-proof valves, pressure gauges, level gauges, thermometers, common valves
1. 1, 6, 12, 24, 36 2. Pressure, liquid level, flow rate, concentration 3. Liquid-liquid mixtures, gas mixtures 4. 2NaHCO3 + H2SO4 == Na2SO4 + 2H2O + 2CO2 5. Chain initiation, chain growth, chain termination 6. Safety valve, rupture disc, level gauge, thermometer, ? (I really can’t guess it.)
1. 36V 24V 12V 6V 2. Volume, pressure, flow rate, velocity 3. Liquid mixtures/compoounds, gas-liquid/gas-solid mixtures 4. H2SO4 + 2NaHCO3 → Na2SO4 + H2O + CO2 5. Chain initiation, chain growth, chain termination 6. Safety valves, burst discs, emergency shut-off devices, pressure gauges, level gauges
1. 36V 24V 12V 6V 2. Volume, pressure, flow rate, velocity 3. Liquid mixtures/compoounds, gas-liquid/gas-solid mixtures 4. H2SO4 + 2NaHCO3 → Na2SO4 + 2H2O + 2CO2 5. Chain initiation, chain growth, chain termination 6. Safety valves, burst discs, emergency shut-off devices, pressure gauges, level gauges
6. The safety accessories of pressure vessels include __________, __________, __________, _______________, and ___________. 1. 36V, 24V, 12V, 6V 2. Pressure, flow rate, speed, volume (weight?) ) 3. Liquid mixtures, gas-liquid mixtures 4. 2NaHCO3 + H2SO4 = Na2SO4 + 2CO2 + 2H2O 5. Initiation, growth, termination 6. Safety valves, pressure gauges, level gauges, temperature measuring instruments, rupture disc devices
1. 36 24 12 6 2. Volume, pressure, flow rate, velocity 3. Liquid mixture, gas mixture 4. H2SO4 + 2NaHCO3 → Na2SO4 + 2H2O + 2CO2 5. I don’t know 6. Safety valves, pressure gauges, level gauges – these are the three common safety accessories, right? I didn’t look at the answers below this time; let’s see what my answer is :$ This post was last edited by onefly2009 on 2009-3-25 22:29.]
1. 36V 24V 12V 6V 2. Volume, pressure, flow rate, velocity 3. Liquid mixtures/compoounds, gas-liquid/gas-solid mixtures 4. H2SO4 + 2NaHCO3 → Na2SO4 + H2O + CO2 5. Initiation, growth, termination 6. Safety valves, pressure gauges, level gauges, temperature measuring instruments, rupture disc devices
1. The safe voltage for use with lanterns, as well as the power voltage for indicator lights, are 36V, 24V, 12V, and 6V. 2. The physical quantities that reflect the conditions during chemical production include temperature, pressure, liquid level, flow rate, and concentration. 3. In unit operations, distillation is used to separate liquid-liquid mixtures, while absorption is used to separate _gas mixtures_. 4. Acid-base fire extinguishers contain a solution of NaHCO3 and dilute H2SO4; they can extinguish fires because the CO2 produced is non-flammable. Write the chemical equation for this reaction: 2NaHCO3 + H2SO4 == Na2SO4 + 2H2O + 2CO2. 5. The polymerization reaction can generally be divided into three stages, namely chain initiation, chain growth, and chain termination. 6. The safety accessories of pressure vessels include safety valves, rupture discs, emergency shut-off devices, pressure gauges, and level gauges
1. 36V 24V 12V 6V 2. Pressure, level, flow rate, concentration 3. Liquid mixtures/compoounds; gas-liquid/gas-solid mixtures 4. H2SO4 + 2NaHCO3 → Na2SO4 + H2O + CO2 5. Chain initiation, chain growth, chain termination 6. Safety valves, burst discs, emergency shut-off devices, pressure gauges, level gauges
1. 36V, 24V, 12V, 6V 2. Pressure, flow rate, velocity, liquid level 3. (Homogeneous) liquid mixtures, gas mixtures 4. 2NaHCO3 + H2SO4 = Na2SO4 + 2H2O + 2CO2 5. Chain initiation, chain growth, chain termination 6. Safety valve, burst disc, pressure gauge, level gauge, thermometer
1. 36V, 24V, 12V, 6V 2. Pressure, flow rate, velocity, volume 3. Liquid mixtures, gas mixtures 4. 2NaHCO3 + H2SO4 = Na2SO4 + 2CO2 + 2H2O 5. Chain initiation, chain growth, chain termination 6. Safety valves, pressure gauges, level gauges, temperature measuring instruments, rupture disc devices
1. 36V, 24V, 12V, 6V 2. Pressure, flow rate, liquid level, pH 3. Liquid mixtures, gas mixtures 4. H2SO4 + 2NaHCO3 → Na2SO4 + 2H2O + 2CO2 5. Chain initiation, chain propagation, chain termination 6. Safety valves, burst discs, emergency shut-off devices, pressure gauges, level gauges
1. 36V 24V 12V 6V 2. Volume, pressure, flow rate, velocity 3. Liquid mixtures/compoounds, gas-liquid/gas-solid mixtures 4. H2SO4 + 2NaHCO3 → Na2SO4 + H2O + CO2 5. Chain initiation, chain growth, chain termination 6. Safety valves, burst discs, emergency shut-off devices, pressure gauges, level gauges
1. 6V, 12V, 24V, 36V. 2. Temperature, pressure, liquid level, flow rate, concentration. 3. Liquid-liquid mixtures, gas mixtures. 4. 2NaHCO3 + H2SO4 == Na2SO4 + 2H2O + 2CO2. 5. Chain initiation, chain growth, and chain termination. 6. Safety valves, rupture disks, emergency shut-off devices, pressure gauges, level gauges
1. 36V 24V 12V 6V 2. Pressure, flow rate, percentage composition or concentration of the material, flow velocity 3. Liquid-liquid mixtures, gas-gas mixtures 4. 2NaHCO3+H2SO4=Na2SO4+2CO2+2H2O 5. Chain initiation, chain growth, chain termination 6. Safety valves, rupture discs, thermometers, pressure gauges, level gauges] This post was last edited by wbp on 2009-3-26 09:53]
Hehe, another set of questions. 1. The safe voltage for use with lighting fixtures, as well as the voltage for indicator lights, can be 36V, 24V, 12V, or 6V. 2. The physical quantities that reflect the conditions during chemical production include temperature, pressure, liquid level, flow rate, and concentration. 3. In unit operations, distillation is used to separate liquid-liquid mixtures, while absorption is used to separate gas mixtures. 4. Acid-base fire extinguishers contain a solution of NaHCO3 and dilute H2SO4; they can extinguish fires because the CO2 produced is non-flammable. Write the chemical equation for this reaction: 2NaHCO3 + H2SO4 == Na2SO4 + 2H2O + 2CO2. 5. The polymerization reaction can generally be divided into three stages, namely chain initiation, chain growth, and chain termination. 6. The safety accessories of pressure vessels include safety valves, rupture discs, emergency shut-off devices, pressure gauges, and level gauges. Is there a problem with that? It’s normal for the answers to be similar! But there’s also a suspicion of water injection, haha. Well, please participate actively!
1. 1, 6, 12, 24, 36 2. Pressure, level, flow rate 3. Liquid-liquid mixtures, gas mixtures 4. 2NaHCO3 + H2SO4 == Na2SO4 + 2H2O + 2CO2 5. Chain initiation, chain growth, chain termination 6. Safety valves, burst discs, level gauges
1.6V, 12V, 24V, 36V 2. Pressure, flow rate, level, composition (?) ) 3. Homogeneous liquid mixtures, gas mixtures 4.2NaHCO3+H2SO4==Na2SO4+2H2O+2CO2(g) 5. Chain initiation, chain growth, and chain termination 6. Not applicable
1.6V, 12V, 24V, 36V 2. Temperature, pressure, liquid level, flow rate, concentration 3. Homogeneous liquid mixtures, gas mixtures 4. 2NaHCO3 + H2SO4 == Na2SO4 + 2H2O + 2CO2(g) 5. Chain initiation, chain growth, and chain termination 6. Safety valves, explosion-proof discs, pressure gauges, level gauges, thermometers, common valves