MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
KLa is measured in the absence of microorganisms? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Refer to Q12 and, calculate OTR. (Given: kLa = 169 mmol O2/ 1 hr atm, P* = 0.0263 atm and PO2 = 0.21 atm). |
| A. | 30.05 mmoles O<sub>2</sub> / liter hr |
| B. | 31.05 mmoles O<sub>2</sub> / liter hr |
| C. | 20.05 mmoles O<sub>2</sub> / liter hr |
| D. | 21.05 mmoles O<sub>2</sub> / liter hr |
| Answer» C. 20.05 mmoles O<sub>2</sub> / liter hr | |
| 3. |
A 10,000 liter (of liquid) bioreactor contains 5 g / L of growing cells qO2 = 20 mmoles O2 / (g cells hr) DT = 2 m, DI = 1 m, (6 blade turbine agitator) x 3 blades and CL = 1 mg O2/L. Calculate OUR. |
| A. | 200 mmoles O<sub>2</sub> / (g cells hr) |
| B. | 250 mmoles O<sub>2</sub> / (g cells hr) |
| C. | 100 mmoles O<sub>2</sub> / (g cells hr) |
| D. | 150 mmoles O<sub>2</sub> / (g cells hr) |
| Answer» D. 150 mmoles O<sub>2</sub> / (g cells hr) | |
| 4. |
Which of the following does not affect KLa value? |
| A. | Air flow rate |
| B. | Presence of enzymes |
| C. | Presence of antifoam agents |
| D. | Degree of agitation |
| Answer» C. Presence of antifoam agents | |
| 5. |
Which of the following is not a chemical method to measure kLa? |
| A. | Dynamic gassing out method |
| B. | Sodium sulfite oxidation method |
| C. | Carbon dioxide absorption method |
| D. | Glucose oxidase method |
| Answer» B. Sodium sulfite oxidation method | |
| 6. |
Speed is the factor affecting the value of kLa. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
The kLa value will depend upon the design and operating conditions of the fermenter , is this statement true or false? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Refer to Q5 and, calculate: An error is made determining the steady-state oxygen level which, instead of 78%, is taken as 70%. What is the percentage error in kLa resulting from this 10% error in ( bar{C_{AL}} )? |
| A. | 50% |
| B. | 25% |
| C. | 75% |
| D. | 100% |
| Answer» E. | |
| 9. |
What is the proper concentration unit of kLa? |
| A. | h<sup>-1</sup> |
| B. | ml/h |
| C. | mmol/h |
| D. | ml/sec |
| Answer» B. ml/h | |
| 10. |
What do you mean by kLa ? |
| A. | Volumetric mass transfer coefficient |
| B. | Henry s law coefficient |
| C. | Volumetric oxygen transfer coefficient |
| D. | Volumetric Solute transfer coefficient |
| Answer» D. Volumetric Solute transfer coefficient | |