MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 9 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. |
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. | 106 |
| B. | 1010 |
| C. | 102 |
| D. | 103 |
| Answer» B. 1010 | |
| 3. |
The the species continuity equation for the axial dispersion model is ____a) u \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z} \frac{∂C_A}{∂z}\) + (rA)Cb) u \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z} \frac{∂C_A}{∂z}\) + Cc) \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z} \frac{∂C_A}{∂z}\) + (rA)Cd) u \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z} \frac{∂C_A}{∂z}\) + (r |
| A. | u \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z} \frac{∂C_A}{∂z}\) + (rA)C |
| B. | u \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z} \frac{∂C_A}{∂z}\) + C |
| C. | \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z} \frac{∂C_A}{∂z}\) + (rA)C |
| D. | u \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z} \frac{∂C_A}{∂z}\) + (rA) |
| Answer» B. u \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z} \frac{∂C_A}{∂z}\) + C | |
| 4. |
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 | |
| 5. |
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 | |
| 6. |
The value of the Peclet number for CSTR is ____ |
| A. | 1 |
| B. | 0 |
| C. | ∞ |
| D. | 2 |
| Answer» C. ∞ | |
| 7. |
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. \(\frac{u}{D} \) | |
| 8. |
The value of the Dispersion coefficient for plug flow is ____ |
| A. | 1 |
| B. | 0 |
| C. | ∞ |
| D. | 2 |
| Answer» C. ∞ | |
| 9. |
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. \(\frac{Lu}{D}\) | |