MCQOPTIONS
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MCQOPTIONS
This section includes 21 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. |
In anaerobic condition sugar in dough is converted into? |
| A. | Alcohol |
| B. | Water |
| C. | Glucose |
| D. | Sucrose |
| Answer» B. Water | |
| 2. |
Beer may be produced by ________________ |
| A. | Fermentation of rice |
| B. | Germination of rice |
| C. | Germination of barley |
| D. | Fermentation of grapes |
| Answer» D. Fermentation of grapes | |
| 3. |
Which type of microbes grow well in the condition of enriched oxygen? |
| A. | Obligate anaerobes |
| B. | Obligate aerobes |
| C. | Facultative anaerobes |
| D. | Facultative aerobes |
| Answer» C. Facultative anaerobes | |
| 4. |
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-1b) 10 gl-1 |
| B. | 10 gl-1b) 25 gl-1d) 55 gl-1 |
| C. | |
| Answer» B. 10 gl-1b) 25 gl-1d) 55 gl-1 | |
| 5. |
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. | |
| 6. |
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. | |
| 7. |
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 | |
| 8. |
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 glsup>-1 |
| B. | 10 glsup>-1 |
| C. | 25 glsup>-1 |
| D. | 55 glsup>-1 |
| Answer» B. 10 glsup>-1 | |
| 9. |
Beer may be produced by ________________$ |
| A. | Fermentation of rice |
| B. | Germination of rice |
| C. | Germination of barley |
| D. | Fermentation of grapes |
| Answer» D. Fermentation of grapes | |
| 10. |
Which_type_of_microbes_grow_well_in_the_condition_of_enriched_oxygen?$ |
| A. | Obligate anaerobes |
| B. | Obligate aerobes |
| C. | Facultative anaerobes |
| D. | Facultative aerobes |
| Answer» C. Facultative anaerobes | |
| 11. |
Cell density is controlled by increasing or decreasing flow of culture medium in which state? |
| A. | Turbidostat |
| B. | Chemostat |
| C. | Continuous culture |
| D. | Synchronus culture |
| Answer» C. Continuous culture | |
| 12. |
The population of microbes is maintained in which phase for long time using continuous culture system? |
| A. | Lag |
| B. | Log |
| C. | Exponential |
| D. | Stationary |
| Answer» C. Exponential | |
| 13. |
The lowest yield of ATP is in ____________ |
| A. | Aerobic respiration |
| B. | Aerobic fermentation |
| C. | Anaerobic respiration |
| D. | Fermentation |
| Answer» E. | |
| 14. |
In_anaerobic_condition_sugar_in_dough_is_converted_into? |
| A. | Alcohol |
| B. | Water |
| C. | Glucose |
| D. | Sucrose |
| Answer» B. Water | |
| 15. |
Maximum rate of oxygen transfer occurs when? |
| A. | CAL = 0 |
| B. | CAL < 0 |
| C. | CAL >= 1 |
| D. | CAL > 1 |
| Answer» B. CAL < 0 | |
| 16. |
At steady state, there is accumulation of oxygen at any location in the fermenter? |
| A. | True |
| B. | False |
| Answer» C. | |
| 17. |
Single cells are smaller than gas bubbles? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 18. |
Which Substrate is consumed rapidly in fermentation process? |
| A. | Fructose |
| B. | Glucose |
| C. | Sucrose |
| D. | Lactose |
| Answer» C. Sucrose | |
| 19. |
What is the unit of “Qo”, the oxygen uptake rate per volume of broth?$ |
| A. | gl ssup>-1 |
| B. | g<sup>-1</sup>l s |
| C. | g<sup>-1</sup>l<sup>-1</sup> s |
| D. | g l<sup>-1</sup>-1 |
| Answer» E. | |
| 20. |
The solubility of oxygen in aqueous solutions is about? |
| A. | 20 ppm |
| B. | 15 ppm |
| C. | 10 ppm |
| D. | 5 ppm |
| Answer» D. 5 ppm | |
| 21. |
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 | |