【Test you】Basic knowledge of chemical engineering (37)
Thread Content
It is convenient for others. Please write the answer directly. Do not paste the original question, otherwise you will not be graded. Thank you for your cooperation! 1. Pressure vessels are divided into four levels according to their pressure. For example, the pressure value of a low-pressure vessel is__ _ _ _ _ _ _ _ Mpa, the pressure value of the high-pressure vessel is__ _ _ _ _ _ _ _ _ _ _ _ _ _ _ MPa. 2. Flow meters currently used in industry are roughly divided into: _ _ _ _ _ _ _ _ ,__ _ _ _ _ _ _ ,__ _ _ _ _ _ _ Three major categories. 3. The mechanical energy possessed by the fluid during the flow process is__ _ _ _ _ ,__ _ _ _ _ and__ _ _ _ . 4. Volatile components refer to__ _ _ _ _ _ _ _ _ _ _ _ _ larger,__ _ _ _ _ _ _ lower,__ _ _ _ _ _ _ _ _ Higher components. 5. Product quality in a broad sense: It means that the product can satisfy__ _ _ _ _ _ _ _ _ Place__ _ _ _ _ _ _ _ characteristics. It includes three contents: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . 6. The principle of glass plate liquid level meter is__ _ _ _ _ _ _ . A. Capillary phenomenon B. Siphon phenomenon C. Connector principle D.A , B and C are not 7. The phenomenon of matter changing from liquid to gaseous state is called__ _ _ _ _ _ _ . A. Sublimation B. Boiling C. Condensation D. Vaporization 8. When the temperature increases, the thermal conductivity of pure metal__ _ _ _ _ _ _ . A. Unchanged B. Increased C. Decreased D. Unable to determine 9. When the fluid flows from high to low, its energy conversion relationship is__ _ _ _ _ _ _ _ . A. Static pressure energy is converted into kinetic energy B. Potential energy is converted into kinetic energy C. Potential energy is converted into kinetic energy and static pressure energy D. Kinetic energy is converted into static pressure energy and potential energy 10. It will occur when the inlet pressure of the centrifugal pump is equal to the saturated vapor pressure corresponding to the liquid temperature.__ _ _ _ _ _ _ Phenomenon. A. Air blockage B. Cavitation C. Air binding D. Unable to absorb liquid Reference answer: 1. 0.1mPa≤P
6. C 7. D 8. C 9. B 10. B
1. 0.1 MPa≤p＜1.6 MPa; 10 MPa≤p＜100 MPa 2. Velocity flow meter, volumetric flow meter, mass flow meter 3. Kinetic energy, static pressure energy, potential energy 4. Volatility, boiling point, saturated vapor pressure 5. User needs must have applicability, reliability and economy 6. C 7, D 8, A 9, B 10, B
Only one: 8. When the temperature increases, the thermal conductivity of pure metal__ _ _ _ _ _ _ . A. Unchanged B. Increased C. Decreased D. Unable to determine C. As the temperature increases, the resistance increases and the thermal conductivity decreases. Superconductivity occurs at low temperatures.
1. 0.1 MPa≤p<1.6 MPa, 10 MPa≤p<100 MPa 2. Velocity flow meter, volumetric flow meter, mass flow meter 3. Kinetic energy, static pressure energy, potential energy 4. Volatility, boiling point, saturated vapor pressure 5. 6. C 7, D 8, C 9, B 10, B
1. 0.1 MPa≤p＜1.6 MPa; 10 MPa≤p＜100 MPa 2. Velocity flow meter, volumetric flow meter, mass flow meter 3. Kinetic energy, static pressure energy, potential energy 4. Volatility, boiling point, saturated vapor pressure 5. User needs must have applicability, reliability and economy 6. C 7, D Evaporization: The phase change process in which a substance changes from a liquid to a gaseous state. Sublimation: a phenomenon in which a substance changes from a gaseous state directly to a solid state without passing through a liquid state. Sublimation: refers to a phenomenon in which a solid substance directly changes to a gaseous state without passing through a liquid state. Boiling: a violent vaporization phenomenon that occurs simultaneously on the surface and inside of a liquid. 8. C The thermal conductivity of pure metals generally decreases as the temperature increases. 9. B 10. B
6. c 7 ,D 8 ,C 9 ,B 10 ,B
1. 0.1 MPa≤p＜1.6 MPa; 10 MPa≤p＜100 MPa 2. Velocity flow meter, volumetric flow meter, mass flow meter 3. Kinetic energy, static pressure energy, potential energy 4. Volatility, boiling point, saturated vapor pressure 5. User needs must have applicability, reliability and economy 6. C 7, D 8, C 9, B 10, B
1. 0.1 MPa≤p＜1.6 MPa; 10 MPa≤p＜100 MPa 2. Velocity flow meter, volumetric flow meter, mass flow meter 3. Kinetic energy, static pressure energy, potential energy 4. Volatility, boiling point, saturated vapor pressure 5. Customers must have, applicability, reliability, economy 6, C 7, D 8, C 9, B 10, B
1. 0.1 MPa≤p＜1.6 MPa; 10 MPa≤p＜35 MPa 2. Volumetric flow meter, velocity flow meter, mass flow meter 3. Kinetic energy, static pressure energy, potential energy 4. Volatility, boiling point, saturated vapor pressure 5. User needs must have applicability, reliability and economy 6. C 7, D 8, B 9, B 10, B
1. 0.1 MPa≤p＜1.6 MPa; 10 MPa≤p＜100 MPa 2. Velocity flow meter, volumetric flow meter, mass flow meter 3. Kinetic energy, static pressure energy, potential energy 4. Volatility, boiling point, saturated vapor pressure 5. User needs must have applicability, reliability and economy 6. C 7, D 8, C 9, B 10, B
1. 0.1 MPa≤p＜1.6 MPa; 10 MPa≤p＜100 MPa 2. Velocity flow meter, volumetric flow meter, mass flow meter 3. Kinetic energy, static pressure energy, potential energy 4. Saturated vapor pressure, boiling point, volatility 5. User needs must have applicability, reliability and economy 6. c 7, A 8, C 9, C 10, B
1. 0.1 MPa≤p＜1.6 MPa; 10 MPa≤p＜100 MPa 2. Velocity flow meter, volume flow meter, mass flow meter 3. Kinetic energy, static pressure energy, potential energy 4. Volatility, boiling point, saturated vapor pressure 5. User needs must have applicability, reliability and economy 6. C 7, D 8, C 9, B 10, C
1. 0.1 MPa≤p＜1.6 MPa; 10 MPa≤p＜100 MPa 2. Velocity flow meter, volumetric flow meter, mass flow meter 3. Kinetic energy, static pressure energy, potential energy 4. Volatility, boiling point, saturated vapor pressure 5. User needs must have applicability, reliability and economy 6. C 7, D 8, A 9, B 10, B