【Test Your Knowledge】Basic Chemical Engineering Knowledge (28)

1B，2B，3D，4B，5C，6C，7B，8B，9A，10B

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase (B) its concentration in the liquid phase. A. Below B. Above C. Equal to D. Approximate 3. The head indicated on a pump’s nameplate refers to (D): A. The increase in kinetic energy B. The increase in potential energy C. The increase in pressure energy D. The maximum parameter 4. The total power of pumps connected in parallel is equal to (B). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump. 5. The characteristic curve of a piping system is a (C). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass transfer and heat transfer processes B. Heat transfer process C. Mass transfer, heat transfer, and multiple vaporization and condensation processes D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is __B___. A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, the feed state is ___B___. A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have _A_: A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation column is superheated steam, the vaporization rate is A. (Is it the same as the q value?) ? ? ) A.e＜0 B.e=1 C.e＞1 D. e＜1

1B，2B，3D，4B，5C，6C，7B，8B，9A，10B

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase (B) its concentration in the liquid phase. A. Below B. Above C. Equal to D. Approximate 3. The head indicated on a pump’s nameplate refers to (D): A. The increase in kinetic energy B. The increase in potential energy C. The increase in pressure energy D. The maximum parameter 4. The total power of pumps connected in parallel is equal to (B). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump. 5. The characteristic curve of a piping system is a (C). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass and heat transfer processes B. Heat transfer process C. Mass and heat transfer processes along with multiple vaporization and condensation steps D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is (B). A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, it indicates that the feed state is (B). A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have (A) A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation tower is superheated steam, the vaporization rate is (A). A. e＜0 B. e=1 C. e＞1 D. e＜1

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase (B) its concentration in the liquid phase. A. Below B. Above C. Equal to D. Approximate 3. The head indicated on a pump’s nameplate refers to (B): A. The increase in kinetic energy B. The increase in potential energy C. The increase in pressure energy D. The maximum parameters 4. The total power of pumps connected in parallel is equal to (B). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump. 5. The characteristic curve of a piping system is a (C). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass transfer and heat transfer processes B. Heat transfer process C. Mass transfer, heat transfer, and multiple vaporization and condensation processes D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is __B___. A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, the feed state is ___B___. A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have _A_: A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation column is superheated steam, the vaporization ratio is _A_: A. e＜0 B. e=1 C. e＞1 D. e＜1

1、B 2、B 3、C 4、B 6、C 7、B 8、B 9、A 10、D

1、B 2、B 3、D 4、B 5、C 6、C 7、B 8、B 9、A 10、B

1B, 2B, 3D, 4B, 5C, 6C, 7B, 8B, 9A, 10D

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase is (B) its concentration in the liquid phase. A. Below B. Above C. Equal to D. Approximate 3. The head indicated on a pump’s nameplate refers to (B): A. The increase in kinetic energy B. The increase in potential energy C. The increase in pressure energy D. The maximum parameters 4. The total power of pumps connected in parallel is equal to (B). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump. 5. The characteristic curve of a piping system is a (C). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass transfer and heat transfer processes B. Heat transfer process C. Mass transfer, heat transfer, and multiple vaporization and condensation processes D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is _B___. A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, the feed state is ___B___. A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have _A____: A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation tower is superheated steam, the vaporization rate is ___C___. A. e＜0 B. e=1 C. e＞1 D. e＜1

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase is (B) its concentration in the liquid phase. A. Below B. Above C. Equal to D. Approximate 3. The head indicated on a pump’s nameplate refers to (D): A. Increase in kinetic energy B. Increase in potential energy C. Increase in pressure energy D. Maximum parameter 4. The total power of pumps connected in parallel is equal to (B). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump. 5. The characteristic curve of a piping system is a straight line (C). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass transfer and heat transfer processes B. Heat transfer process C. Mass transfer, heat transfer, and multiple vaporization and condensation processes D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is __B___. A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, the feed state is ___B___. A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have _A_: A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation column is superheated steam, the vaporization rate is ___B___. A. e＜0 B. e=1 C. e＞1 D. e＜1

1、B2、B 3、C 4、B 5、C 6、C 7、B 8、B 9、A 10、B

1B 2B 3D 4B 5C 6C 7B 8B 9A 10B

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase is (B) its concentration in the liquid phase. A. Lower than B. Higher than C. Equal to D. Approximate 3. The head indicated on a pump’s nameplate refers to (D): A. The increase in kinetic energy B. The increase in potential energy C. The increase in pressure energy D. The maximum parameter 4. The total power of pumps connected in parallel is equal to (B). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump. 5. The characteristic curve of a piping system is a (C). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass transfer and heat transfer processes B. Heat transfer process C. Mass transfer, heat transfer, and multiple vaporization and condensation processes D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is ___B___. A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, the feed state is __B____. A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have __A___: A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation column is superheated steam, the vaporization rate is __A____. A. e＜0 B. e=1 C. e＞1 D. e＜1

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase is (B) its concentration in the liquid phase. A. Lower than B. Higher than C. Equal to D. Approximately equal 3. The head indicated on a pump’s nameplate refers to (C): A. The increase in kinetic energy B. The increase in potential energy C. The increase in pressure energy D. The maximum parameters 4. The total power of pumps connected in parallel is equal to (B). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump. 5. The characteristic curve of a piping system is a (C). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass transfer and heat transfer processes B. Heat transfer process C. Mass transfer, heat transfer, and multiple vaporization and condensation processes D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is __B___. A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, the feed state is __B___. A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have _A__: A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation tower is superheated steam, the vaporization rate is __C__. A. e＜0 B. e=1 C. e＞1 D. e＜1

1、B 2、B 3、D 4、B 5、C 6、C 7、B 8、B 9、A 10、B

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase (B) its concentration in the liquid phase. A. Below B. Above C. Equal to D. Approximate 3. The head indicated on a pump’s nameplate refers to (B): A. The increase in kinetic energy B. The increase in potential energy C. The increase in pressure energy D. The maximum parameters 4. The total power of pumps connected in parallel is equal to (D). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump. 5. The characteristic curve of a piping system is a (C). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass transfer and heat transfer processes B. Heat transfer process C. Mass transfer, heat transfer, and multiple vaporization and condensation processes D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is __B____. A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, the feed state is __B____. A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have _A____: A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation tower is superheated steam, the vaporization rate is ___C___. A. e＜0 B. e=1 C. e＞1 D. e＜1

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase is (B) its concentration in the liquid phase. A. Lower than B. Higher than C. Equal to D. Approximate 3. The head indicated on a pump’s nameplate refers to (D): A. The increase in kinetic energy B. The increase in potential energy C. The increase in pressure energy D. The maximum parameter 4. The total power of pumps connected in parallel is equal to (B). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump. 5. The characteristic curve of a piping system is a (C). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass transfer and heat transfer processes B. Heat transfer process C. Mass transfer, heat transfer, and multiple vaporization and condensation processes D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is __B____. A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, it indicates that the feed state is _B_____. A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have __A___: A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation column is superheated steam, the vaporization rate is __C____. A. e＜0 B. e=1 C. e＞1 D. e＜1 Last edited by wysup on 2009-4-10 22:15]

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase (B) its concentration in the liquid phase. A. Below B. Above C. Equal to D. Approximate 3. The head indicated on a pump’s nameplate refers to (C): (I’m not sure what the options mean; head is essentially the pressure rise, which represents the effective energy provided by a centrifugal pump per unit weight of liquid.) A. Increase in kinetic energy B. Increase in potential energy C. Increase in pressure energy D. Maximum parameter 4. The total power of pumps connected in parallel equals (B). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump. 5. The characteristic curve of a piping system is a (C). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass transfer and heat transfer processes B. Heat transfer process C. Mass transfer, heat transfer, and multiple vaporization and condensation processes D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is __B___. A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, the feed state is ___B___. A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have _A_: A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation tower is superheated steam, the vaporization rate is C. A. e＜0 B. e=1 C. e＞1 D. e＜1

In question 10, the values of e and q are different; q represents the liquefaction ratio, with q = W/F； e is the vaporization rate; e = D/W = 1 – q. Do you understand?

1. The instrument regulator P represents (B). A. Integration B. Scale factor C. Differential time D. None of the above. 2. In a phase-equilibrium system, the concentration of the light component in the vapor phase is (B) its concentration in the liquid phase. A. Below B. Above C. Equal to D. Approximate 3. The head indicated on a pump’s nameplate refers to (C): A. The increase in kinetic energy B. The increase in potential energy C. The increase in pressure energy D. The maximum parameters 4. The total power of pumps connected in parallel is equal to (D). A. The product of the powers of each pump B. The sum of the powers of each pump C. The difference between the powers of each pump D. The power of a single pump 5. The characteristic curve of a piping system is a (A). A. Straight line B. Irregular curve C. Parabola D. Parallel lines 6. The distillation process is a (C). A. Mass transfer and heat transfer processes B. Heat transfer process C. Mass transfer, heat transfer, and multiple vaporization and condensation processes D. Mass transfer process 7. The temperature distribution in the stripping section of a distillation column is __B____. A. The temperature decreases from top to bottom. B. The temperature increases from top to bottom. C. The temperature remains constant from top to bottom. D. The temperature does not change from top to bottom. 8. When the vaporization rate is 0＜e＜1, it indicates that the feed state is _B_____. A. Saturated liquid feed B. Partially vaporized two-phase feed C. Superheated steam feed D. Subcooled liquid feed 9. Compared to vortex pumps, centrifugal pumps have _A____: A. Low head, high flow rate, poor self-priming ability B. High head, low flow rate, strong self-priming ability C. Low head, low flow rate, strong self-priming ability D. High head, low flow rate, poor self-priming ability 10. When the feed to a distillation column is superheated steam, the vaporization rate is _C____. A. e＜0 B. e=1 C. e＞1 D. e＜1