MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Bioprocess Engineering Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Refer to Q8 and, calculate the bacteria suffer growth inhibition after copper sulphate is accidently added to the fermentation broth. This causes a reduction in oxygen uptake rate to 3 mmol g-1 h-1. What maximum cell concentration can now be supported by the fermenter? |
| A. | 50 gl-1 |
| B. | 10 gl-1 |
| C. | 25 gl-1 |
| D. | 55 gl-1 |
| Answer» B. 10 gl-1 | |
| 2. |
A strain of Azotobacter vinelandii is cultured in a 15 m3 stirred fermenter for alginate production. Under current operating conditions kLa is 0.17 s-1. Oxygen solubility in the broth is approximately 8 x 10-3 kg m-3. The specific rate of oxygen uptake is 12.5 mmol g-1 h-1. What is the maximum possible cell concentration? |
| A. | 10 gl-1 |
| B. | 15 gl-1 |
| C. | 20 gl-1 |
| D. | 12 gl-1 |
| Answer» E. | |
| 3. |
What is the unit of “Qo”, the oxygen uptake rate per volume of broth? |
| A. | gl s-1 |
| B. | g-1l s |
| C. | g-1l-1 s |
| D. | g l-1s-1 |
| Answer» E. | |
| 4. |
What do you mean by “NA” in mass transfer? |
| A. | Rate of oxygen transfer per unit volume of fluid |
| B. | Rate of oxygen transfer per unit volume of gas |
| C. | Avogadro number |
| D. | Rate of oxygen transfer per unit mass of solid |
| Answer» B. Rate of oxygen transfer per unit volume of gas | |