MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Reaction Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The dispersion model is a ____ |
| A. | Two parameter model |
| B. | One parameter model |
| C. | No parameter model |
| D. | Three parameter model |
| Answer» C. No parameter model | |
| 2. |
The range of reactor peclet number for open tubes is ____ |
| A. | 10<sup>6</sup> |
| B. | 10<sup>10</sup> |
| C. | 10<sup>2</sup> |
| D. | 10<sup>3</sup> |
| Answer» B. 10<sup>10</sup> | |
| 3. |
If Da is diffusivity, CT is tracer concentration and UT is overall heat transfer coefficient, then the pulse tracer balance with dispersion is obtained as ____ |
| A. | ( frac{ ^2 C_T}{ z^2} frac{ (UC_T)}{ z} = frac{ C_T}{ z} ) |
| B. | D<sub>a</sub> ( frac{ ^2 C_T}{ z^2} frac{ (UC_T)}{ z} = frac{ C_T}{ z} ) |
| C. | D<sub>a</sub> ( frac{ ^2 C_T}{ z^2} + frac{ (UC_T)}{ z} = frac{ C_T}{ z} ) |
| D. | D<sub>a</sub> ( frac{ ^2 C_T}{ z^2} frac{ (UC_T)}{ z} = frac{ C_T}{ z} ) |
| Answer» C. D<sub>a</sub> ( frac{ ^2 C_T}{ z^2} + frac{ (UC_T)}{ z} = frac{ C_T}{ z} ) | |
| 4. |
The the species continuity equation for the axial dispersion model is ____ |
| A. | u ( frac{ C_A}{ z} = frac{ D_a}{ z} frac{ C_A}{ z} ) + (r<sub>A</sub>)C |
| B. | u ( frac{ C_A}{ z} = frac{ D_a}{ z} frac{ C_A}{ z} ) + C |
| C. | ( frac{ C_A}{ z} = frac{ D_a}{ z} frac{ C_A}{ z} ) + (r<sub>A</sub>)C |
| D. | u ( frac{ C_A}{ z} = frac{ D_a}{ z} frac{ C_A}{ z} ) + (r<sub>A</sub>) |
| Answer» B. u ( frac{ C_A}{ z} = frac{ D_a}{ z} frac{ C_A}{ z} ) + C | |
| 5. |
The dispersion model accounts for ____ |
| A. | Deviation from ideal PFR |
| B. | Modelling ideal CSTR |
| C. | Combining batch and CSTR |
| D. | CSTRs connected in parallel |
| Answer» B. Modelling ideal CSTR | |
| 6. |
The range of dispersion number for PFR is ____ |
| A. | ( frac{D}{uL} ) < 0.1 |
| B. | ( frac{D}{uL} ) < 0.01 |
| C. | ( frac{D}{uL} ) > 1 |
| D. | ( frac{D}{uL} ) > 10 |
| Answer» C. ( frac{D}{uL} ) > 1 | |
| 7. |
The value of the Peclet number for CSTR is ____ |
| A. | 1 |
| B. | 0 |
| C. | |
| D. | 2 |
| Answer» C. | |
| 8. |
Which of the following represents Peclet number? |
| A. | ( frac{Lu}{D} ) |
| B. | ( frac{u}{D} ) |
| C. | ( frac{u}{DL} ) |
| D. | ( frac{D}{uL} ) |
| Answer» B. ( frac{u}{D} ) | |
| 9. |
The value of the Dispersion coefficient for plug flow is ____ |
| A. | 1 |
| B. | 0 |
| C. | |
| D. | 2 |
| Answer» C. | |
| 10. |
If D is the fluid dispersion coefficient, L is the length of spread of tracer and u is the fluid velocity, then which of the following represents Dispersion number? |
| A. | ( frac{L}{uD} ) |
| B. | ( frac{L}{D} ) |
| C. | ( frac{D}{uL} ) |
| D. | ( frac{Lu}{D} ) |
| Answer» D. ( frac{Lu}{D} ) | |