【Test you】Basic knowledge of chemical engineering (26)
Thread Content
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. ( ) 2. In chemical production, evaporation refers to the unit operation of heating the solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solid. ( ) 3. The surface area occupied by a unit weight of liquid is called specific surface area. ( ) 4. The heat exchange process, the process in which the temperature of the substance changes and the aggregation state of the substance also changes is called condensation. ( ) 5. Horizontal heat exchangers generally use skirt-type supports. ( ) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. ( ) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. ( ) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. ( ) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. ( ) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( ) reference answer: 1. Right ； 2. Right ； 3.Yes ； 4.Yes ； 5. Wrong ； 6.Yes ； 7.Yes ； 8.Yes ； 9.Yes ； 10. Wrong. Did you answer it correctly? This post was last edited by zhangyong6404 on 2009-4-9 20:21 ]
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (Wrong) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solids. (True) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (False) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (Wrong) 5. Horizontal heat exchangers generally use skirt-type supports. (False) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (Correct) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (True) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (True) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (False) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( right )
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (Wrong) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solids. (True) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (False) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (Wrong) 5. Horizontal heat exchangers generally use skirt-type supports. (False) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (Correct) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (True) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (True) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (False) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( right )
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (F) 2. In chemical production, evaporation refers to the unit operation of heating the solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solid. (F) 3. The surface area occupied by a unit weight of liquid is called the specific surface area. (F) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (F) 5. Horizontal heat exchangers generally use skirt-type supports. (F) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (T) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (F) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (T) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (F) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. (T)
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (Correct) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solids. (Correct) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (Incorrect) 4. The heat exchange process, the process in which the temperature of the substance changes and the aggregation state of the substance also changes is called condensation. (Incorrect) 5. Horizontal heat exchangers generally use skirt supports. (Correct) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (Correct) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (Correct) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (Correct) 9. Distillation is divided according to the number of components of the raw materials, and can be divided into two-component distillation and multi-component distillation. (Correct) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( mistake )
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (True) Sublimation is the process in which a substance changes directly from solid to gaseous state. 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solid. (True) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (False) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (Wrong) 5. Horizontal heat exchangers generally use skirt-type supports. (False) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (Correct) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (True) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (True) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (False) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( right )
1. Correct 2. Correct 3. Wrong 4. Wrong 5. Correct 6. Correct 7. Correct 8. Correct 9. Correct 10. Wrong
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (True) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solids. (True) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (False) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (Wrong) 5. Horizontal heat exchangers generally use skirt-type supports. (False) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (Correct) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (True) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (True) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (False) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( right )
1, wrong 2, wrong 3, wrong 4, wrong 5, wrong 6, right 7, right 8, wrong 9, wrong 10, wrong
1, √ 2, √ 3, × 4, × 5, × 6, √ 7, √ 8, √ 9, √ 10,×
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (True) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solids. (True) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (False) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (right) 5. Horizontal heat exchangers generally use skirt-type supports. (True) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (Correct) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (True) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (True) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (True) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( right )
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (True) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solids. (True) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (Incorrect) 4. The heat exchange process, the process in which the temperature of the substance changes and the aggregation state of the substance also changes is called condensation. (Incorrect) 5. Horizontal heat exchangers generally use skirt supports. (Error) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (Correct) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (True) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (True) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (Incorrect) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( right )
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (True) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solids. (True) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (False) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (Wrong) 5. Horizontal heat exchangers generally use skirt-type supports. (False) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (Correct) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (True) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (True) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (False) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( right )
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (Wrong) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solids. (True) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (False) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (Wrong) 5. Horizontal heat exchangers generally use skirt-type supports. (False) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (Correct) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (True) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (True) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (False) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( wrong)
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (Wrong) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solids. (True) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (False) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (Wrong) 5. Horizontal heat exchangers generally use skirt-type supports. (False) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (Correct) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (True) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (True) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (False) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. ( right )
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (T) 2. In chemical production, evaporation refers to the unit operation of heating the solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solid. (T) 3. The surface area occupied by a unit weight of liquid is called the specific surface area. (F) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (F) 5. Horizontal heat exchangers generally use skirt-type supports. (F) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (T) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (T) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (F) 9. Distillation is divided according to the number of components of the raw materials, and can be divided into two-component distillation and multi-component distillation. (T) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. (F)
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (True) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solids. (Wrong) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (False) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (Wrong) 5. Horizontal heat exchangers generally use skirt-type supports. (False) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (True) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition on each tray. An increase in temperature indicates that the components become heavier. (True) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (True) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (True) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. (wrong )
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. ( R ) 2. In chemical production, evaporation refers to the unit operation of heating the solution of non-volatile materials to boiling to vaporize the solvent to obtain gas or concentrate and precipitate solid. (R) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (W) 4. The process of heat exchange, the temperature change of the substance, and the aggregation state of the substance also change is called condensation. (W) 5. Horizontal heat exchangers generally use skirt-type supports. (W) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. ( R ) 7. According to the principle of phase equilibrium, the temperature of each tray in the distillation tower reflects the composition of each tray. An increase in temperature indicates that the components become heavier. (R) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (R) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (R) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. (R)
1, √ 2, √ 3, × 4, × 5, × 6, √ 7, √ 8, √ 9, √ 10,×
1. True 2, False 3, False 4, True 5, False (saddle) 6. True 7, False 8, True 9, False 10, False
1. The phenomenon of direct vaporization of solid surfaces is called sublimation. (√) 2. In chemical production, evaporation refers to the unit operation of heating a solution of non-volatile materials to boiling to vaporize the solvent, thereby obtaining gas or concentrating and precipitating solids. (√) 3. The surface area occupied by a unit weight of liquid is called specific surface area. (×) 4. The heat exchange process, the process in which the temperature of the substance changes and the aggregation state of the substance also changes is called condensation. (×) 5. Horizontal heat exchangers generally use skirt-type supports. (√) 6. When the tower equipment is installed horizontally, the correctness and levelness of the tray position are guaranteed by the support ring. (√) 7. According to the principle of phase balance, the temperature of each tray in the distillation tower reflects the composition on each tray, and an increase in temperature indicates that the components become heavier. (√) 8. In order to increase the transfer rate of the heat exchanger, the driving force for heat transfer must be increased and the resistance to heat transfer must be reduced. (√) 9. Distillation is divided according to the number of components of the raw material, and can be divided into two-component distillation and multi-component distillation. (√) 10. The process of cooling a saturated liquid under its saturated pressure to a temperature lower than its condensation temperature is called supercooling. The result of supercooling is that the refrigeration capacity is reduced. (×)