【Test Your Knowledge】Basic Chemical Engineering Knowledge (14)

1) Safety management for all personnel, safety management throughout the entire process, comprehensive safety management, round-the-clock safety management. 2) Instability, wear and tear, deterioration. 3) Pipeline centerline; the slower the rate, the closer it is to 0. 4) Rate from liquid to gas, rate from gas to liquid, gas-liquid equilibrium, critical temperature. 5) Head-flow curve, shaft power-flow curve, efficiency flow direction curve. 6) A 7) A 8) B 9) B 10) B. This post was last edited by qq375170364 on 2009-3-27 at 17:32.]

1. Safety work must adhere to the \"four-all management\" principle of involving all employees, covering all aspects, throughout the entire process, and 24/7. 2. The property whereby the zero point and indication of a gauge change over time is called _________, and it is mainly caused by _____ and _________ among other factors. 3. The velocity of the fluid within a pipe is, under normal conditions, highest at the __center of the pipe________; the closer to the wall, the __lower__ the velocity becomes, with the velocity at the wall being __zero__. 4. When the rate at which the liquid’s ____ enters the gas phase is equal to the rate at which ____ enters the liquid phase from the gas phase, the liquid becomes _saturated_. The temperature at which this occurs is called the ____saturation temperature__ of that liquid. 5. The performance curve of a centrifugal pump refers to the _______ pipeline characteristic curve and the ____ pump characteristic _______ curve. 6. The thermal resistance of convective heat transfer is mainly concentrated in _____A___. A. Laminar inner layer B. Turbulent core C. Transitional flow region D. Conduction through the wall 7. The external energy supplied by a pump to a fluid is called the pump’s _____A___. A. Head B. Lift height C. Power D. Efficiency 8. Glass wool is commonly used for insulation in factories because its thermal conductivity is __B______. A. Large B. Small C. Moderate D. Largest 9. When there is a fire involving electrical equipment, _____B___ extinguishers cannot be used to put out the fire. A. Foam B. 1211 C. CO2 D. Dry powder 10. When two pumps of the same model are connected in parallel, the actual flow rate is ___B______. A.Q combined > 2Q1 B.Q combined

1. Total quality, involvement of everyone throughout the whole process, and comprehensive application of various effective modern management methods. 2. Zero drift, temperature, voltage. 3. Axis value; small, equal to 0. 4. Saturated vapor pressure, external pressure, boiling, boiling point. 5. Head–flow curve, power–flow curve, efficiency–flow curve. 6. A 7. A 8. B 9. A 10. B

1. Safety management for all personnel, safety management throughout the entire process, comprehensive safety management, 24/7 safety management. 2. Instability, wear and tear, deterioration. 3. Pipeline centerline; the slower the speed, the closer it is to 0. 4. Rate from liquid to gas, rate from gas to liquid, gas-liquid equilibrium, critical temperature. 5. Head-flow curve, shaft power-flow curve, efficiency-flow direction curve. 6. A 7. A 8. B 9. B 10. B

I only answer what I know. 2. The property whereby the zero point and indication of a gauge change over time is called _zero drift_, which is mainly caused by factors such as __wear__ and __deformation__.

1. Total quality, involvement of everyone throughout the whole process, and comprehensive application of various effective modern management methods. 2. Zero drift, temperature, voltage. 3. Central axis: small value, approaching zero. 4. Saturated vapor pressure, external pressure, boiling, boiling point. 5. Head–flow curve, power–flow curve, efficiency–flow curve. 6. A 7. A 8. B 9. A 10. C

1. Safety work must adhere to the “four-all management” principle of (all employees), (all aspects), (the entire process), and (24/7). 2. The property whereby the zero point and indication of a gauge change over time is called (zero drift), and it is mainly caused by factors such as (temperature) and (pressure). 3. The velocity of the fluid within the pipe is, under normal conditions, highest at the center; it decreases as one moves closer to the wall of the pipe, and the velocity at the wall is zero. 4. When the (saturation vapor pressure) of a liquid is equal to the (external air pressure), the liquid (boils), and its temperature is called the (boiling point) of that liquid. 5. The performance curves of a centrifugal pump refer to the (head-flow) curve, the (shaft power-flow) curve, and the (efficiency-flow rate) curve. 6. The thermal resistance of convective heat transfer is mainly concentrated in ___A__. A. Laminar inner layer B. Turbulent core C. Transitional flow region D. Conduction through the wall 7. The external energy supplied by a pump to a fluid is referred to as the pump’s ___A___. A. Head B. Lift height C. Power D. Efficiency 8. Glass wool is commonly used for insulation in factories because its thermal conductivity is __B___. A. Large B. Small C. Moderate D. Largest 9. When there is a fire involving electrical equipment, ___D__ extinguishers cannot be used to put out the fire. A. Foam B. 1211 C. CO2 D. Dry powder 10. When two pumps of the same model are connected in parallel, the actual flow rate is ___B___. A.Q combined > 2Q1 B.Q combined

6. The thermal resistance of convective heat transfer is mainly concentrated in ___A__. A. Laminar inner layer B. Turbulent core C. Transitional flow region D. Conduction through the wall 7. The external energy supplied by a pump to a fluid is referred to as the pump’s ___A___. A. Head B. Lift height C. Power D. Efficiency 8. Glass wool is commonly used for insulation in factories because its thermal conductivity is __B___. A. Large B. Small C. Moderate D. Largest 9. When there is a fire involving electrical equipment, ___D__ extinguishers cannot be used to put out the fire. A. Foam B. 1211 C. CO2 D. Dry powder 10. When two pumps of the same model are connected in parallel, the actual flow rate is ___B___. A.Q combined > 2Q1 B.Q combined

1. The principle of “four-all management”: all personnel, in all aspects, throughout the whole process, and around the clock. 2. Zero-point drift, temperature, voltage 3. Pipeline centerline; the slower it is, the closer it is to zero 4. Rate from liquid to gas, rate from gas to liquid, gas-liquid equilibrium, critical temperature 5. Head flow, power flow, efficiency flow 6. A 7. A 8. B 9. B 10. B

1. Total quality, involvement of everyone throughout the whole process, and comprehensive application of various effective modern management methods. 2. Zero drift wear and deformation. 3. The smaller the central axis value, the closer it is to zero. 4. Saturated vapor pressure, external pressure, boiling, boiling point. 5. Head–flow curve, power–flow curve, efficiency–flow curve. 6. D 7. A 8. B 9. B 10. B

All personnel, in all aspects, throughout the entire process, 24/7 – zero drift, temperature, voltage; pipeline centerline; the slower the rate, the closer it is to zero; head flow rate, shaft power flow rate, pump efficiency at rated flow rate: A A B A B

1. All personnel, entire process, all aspects, around the clock 2. Zero drift, environment, components 3. Axis of the tube; the slower, the better 4. Saturated vapor pressure, external air pressure, boiling, boiling point 5. Q-H, Q-N, Q-efficiency 6. A 7. A 8. B 9. A 10. B

1) Safety management across all personnel, throughout the entire process, in all aspects, and around the clock. 2) Unstable temperature and pressure. 3) The smaller the pipeline’s centerline distance, the better; ideally it should be close to 0. 4) Rate of transition from liquid to gas, rate of transition from gas to liquid, gas-liquid equilibrium, critical temperature. 5) Head-flow curve, shaft power-flow curve, efficiency-flow direction curve. 6) A 7) A 8) B 9) B 10) B. This post was last edited by genius510 on 2009-3-27 at 23:02.]

1. Safety management for all personnel, safety management throughout the entire process, comprehensive safety management, 24/7 safety management. 2. Instability, wear and tear, deterioration. 3. Pipeline centerline; the slower the speed, the closer it is to 0. 4. Rate from liquid to gas, rate from gas to liquid, gas-liquid equilibrium, critical temperature. 5. Head-flow curve, shaft power-flow curve, efficiency-flow direction curve. 6. A 7. A 8. B 9. B 10. B

1. All personnel, in all aspects, throughout the whole process, around the clock. 2. Zero drift, due to components and the environment. 3. The center of the pipeline; the smaller this value, the better, with zero being ideal. 4. Vaporization rate and condensation rate, until a vapor-liquid equilibrium state (also known as saturation state) is reached; saturation temperature. 5. The operating performance curve of a centrifugal pump refers to the characteristic curve of the pipeline as well as the pump’s own characteristics (flow rate–head pressure curve). The characteristic curves of a centrifugal pump refer to the flow rate-head curve, the flow rate-axis power curve, and the flow rate-efficiency curve: 6, A 7, A 8, B 9, A 10, B

1. Total quality, involvement of everyone throughout the whole process, and comprehensive application of various effective modern management methods. 2. Zero drift, temperature, voltage. 3. Axis value; small, equal to 0. 4. Saturated vapor pressure, external pressure, boiling, boiling point. 5. Head–flow curve, power–flow curve, efficiency–flow curve. 6. A 7. A 8. B 9. A 10. B

1 All personnel, in all aspects, throughout the whole process, around the clock 2 Zero-point drift, temperature and voltage 3 Center; the smaller the value, the closer it is to zero 4 Rate from liquid to gas, rate from gas to liquid, gas-liquid equilibrium, critical temperature 5 Head flow, power flow, efficiency flow 6 A 7 A 8 B 9 B 10 B

1. Total quality, involvement of everyone throughout the whole process, and comprehensive use of various effective modern management methods. 2. Zero drift, temperature, voltage. 3. Axis value: small, equal to 0. 4. Saturated vapor pressure, external pressure, boiling, boiling point. 5. Head-flow curve, power-flow curve, efficiency-flow curve. 6. A 7. A 8. B 9. B 10. B

1. Comprehensive safety management for all personnel, safety management throughout the entire process, all-round safety management, 24/7 safety management. 2. Instability, wear and tear, deterioration. 3. Pipeline centerline; the slower the rate, the closer it is to 0. 4. Rate from liquid to gas, rate from gas to liquid, gas-liquid equilibrium, critical temperature. 5. Head-flow curve, shaft power-flow curve, efficiency-flow direction curve. 6A, 7A, 8B, 9B, 10B

1. All personnel, in all aspects, throughout the whole process, 24/7. 2. Zero drift, temperature, voltage. 3. Pipeline centerline; the slower it is, the closer to zero it is. 4. Rate from liquid to gas, rate from gas to liquid, gas-liquid equilibrium, critical temperature. 5. Head flow, power flow, efficiency flow. 6. A 7. A 8. B 9. A 10. B