MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If CA is the final concentration and CA0 is the initial concentration, the conversion of a reaction is expressed as ____a) \(\frac{C_{A0}-C_A}{(C_{A0})} \) b) \(\frac{C_{A0}-C_A}{(-r_A)}\)Vc) \(\frac{C_{A0}-C_A}{(-r_ |
| A. | \(\frac{C_{A0}-C_A}{(C_{A0})} \) |
| B. | \(\frac{C_{A0}-C_A}{(-r_A)}\)V |
| C. | \(\frac{C_{A0}-C_A}{(-r_A)V} \) |
| D. | \(\frac{C_A}{(C_{A0})} \) |
| Answer» B. \(\frac{C_{A0}-C_A}{(-r_A)}\)V | |
| 2. |
If the conversion of a first order liquid phase reaction occurring in a CSTR is 75%, molar feed rate is 5 mol/min, the rate of the reaction is 5 \(\frac{mol}{litre.min} \) then the volume of the reactor (in litre) is ____ |
| A. | 0.5 |
| B. | 0.75 |
| C. | 0.33 |
| D. | 0.4 |
| E. | is ____a) 0.5b) 0.75c) 0.33d) 0.4 |
| Answer» C. 0.33 | |
| 3. |
The performance equation of a PFR is ____a) \(\frac{F_{A_0}}{dV} = \frac{dX_A}{(-r_A)} \) b) \(\frac{dV}{F_{A_0}} = \frac{(-r_A)}{dX_A} \) c) \(\frac{F_{A_0}}{dV} = \frac{(-r_A)}{dX_A} \) d) \(\frac{F_{A_0}}{dX_A} = \frac{(-r_ |
| A. | \(\frac{F_{A_0}}{dV} = \frac{dX_A}{(-r_A)} \) |
| B. | \(\frac{dV}{F_{A_0}} = \frac{(-r_A)}{dX_A} \) |
| C. | \(\frac{F_{A_0}}{dV} = \frac{(-r_A)}{dX_A} \) |
| D. | \(\frac{F_{A_0}}{dX_A} = \frac{(-r_A)}{dV} \) |
| Answer» D. \(\frac{F_{A_0}}{dX_A} = \frac{(-r_A)}{dV} \) | |
| 4. |
The performance equation of a CSTR is ____a) \(\frac{F_{A_0}}{V} = \frac{(-r_A)}{X_A} \) b) \(\frac{F_{A_0}}{V} = \frac{X_A}{(r_A)} \) c) \(\frac{V}{X_A} = \frac{(-r_ |
| A. | \(\frac{F_{A_0}}{V} = \frac{(-r_A)}{X_A} \) |
| B. | \(\frac{F_{A_0}}{V} = \frac{X_A}{(r_A)} \) |
| C. | \(\frac{V}{X_A} = \frac{(-r_A)}{F_{A_0}} \) |
| D. | \(\frac{F_{A_0}}{V} = \frac{X_A}{-r_A} \) |
| Answer» B. \(\frac{F_{A_0}}{V} = \frac{X_A}{(r_A)} \) | |
| 5. |
For a PFR, the area under the curve \(\frac{1}{-r_A}\) vs XA gives ____ |
| A. | \(\frac{F_{A_0}}{dV} \) |
| B. | \(\frac{dV}{F_{A_0}} \) |
| C. | dVCA0 |
| D. | dVFA0 |
| Answer» C. dVCA0 | |
| 6. |
Which one of the following combinations gives the highest conversion for second order reaction? |
| A. | PFR followed by smaller CSTR followed by a bigger CSTR |
| B. | PFR followed by bigger CSTR followed by a bigger CSTR |
| C. | Smaller CSTR followed by PFR followed by a bigger CSTR |
| D. | Bigger CSTR followed by a PFR followed by smaller CSTR |
| Answer» B. PFR followed by bigger CSTR followed by a bigger CSTR | |
| 7. |
Which of the following is true for a reaction occurring in a batch reactor? |
| A. | The accumulation term is zero |
| B. | Only the component input term is zero |
| C. | Only the component output term is zero |
| D. | Both the component input and output terms are zero |
| Answer» E. | |
| 8. |
State true or false.The average concentration of product is low inside a CSTR. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
State true or false.There is no axial mixing in a plug flow reactor. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
The combination of ideal reactors among the following is ____ |
| A. | Plug flow reactor and batch reactor |
| B. | Batch reactor and mixed flow reactor |
| C. | Plug flow reactor and mixed flow reactor |
| D. | Batch reactor only |
| Answer» D. Batch reactor only | |