MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Bioprocess Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the unit of heat transfer coefficient? |
| A. | Watt m<sup>2</sup> / k |
| B. | Watt m<sup>2</sup> k |
| C. | Watt / m<sup>2</sup> k |
| D. | Watt / m<sup>2</sup>k<sup>2</sup> |
| Answer» D. Watt / m<sup>2</sup>k<sup>2</sup> | |
| 2. |
Molar flux consist of ______________ |
| A. | Molar flux = partial flux + diffusion |
| B. | Total flux = bulk motion + diffusion |
| C. | Molar flux = solid motion + flow rate |
| D. | Total flux = partial flux + flow rate |
| Answer» C. Molar flux = solid motion + flow rate | |
| 3. |
If a species appears in the numerator of the rate law, it is probably a product. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Rate at the surface will be higher due to heat transfer limitations. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
If the reaction is endothermic, the temperature at the catalyst surface will be less. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Denitrifying bacteria are immobilised in gel beads and used in a stirred reactor for removal of nitrate from groundwater. At a nitrate concentration of 3 g m-3, the conversion rate is 0.011 g s-1 m-3 catalyst. The effective diffusivity of nitrate in the gel is 1.5 10-9 m2 s-1, the beads are 6 mm in diameter, and the liquid-solid mass-transfer coefficient is 10-5 m s-1. Km for the immobilised bacteria is approximately 25 g m-3. What is the value of an observable modulus for external mass transfer, ? |
| A. | 0.35 |
| B. | 0.36 |
| C. | 0.37 |
| D. | 0.38 |
| Answer» D. 0.38 | |
| 7. |
If << 1, then _________ |
| A. | C<sub>AS</sub> = C<sub>Ab</sub> |
| B. | C<sub>AS</sub> < C<sub>Ab</sub> |
| C. | C<sub>AS</sub> > C<sub>Ab</sub> |
| D. | C<sub>AS</sub> = C<sub>Ab</sub> = 0 |
| Answer» B. C<sub>AS</sub> < C<sub>Ab</sub> | |
| 8. |
What is the dimension of liquid phase mass-transfer coefficient kS ? |
| A. | LT<sup>-1</sup> |
| B. | LT |
| C. | L<sup>-1</sup>T<sup>-1</sup> |
| D. | L<sup>-1</sup>T |
| Answer» B. LT | |