MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Fermentation Technology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Casson body rheology is a Newtonian type fluid. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
The rheological type of Endomyces sp. is ____________ |
| A. | Pseudoplastic rheology |
| B. | Bingham plastic rheology |
| C. | Dilatant rheology |
| D. | Casson body |
| Answer» B. Bingham plastic rheology | |
| 3. |
Which of the following organism broth has Bingham plastic rheology? |
| A. | <i>Penicillium chrysogenum</i> |
| B. | <i>Endomyces sp.</i> |
| C. | <i>Streptomyces kanamyceticus</i> |
| D. | <i>Streptomyces scabies</i> |
| Answer» B. <i>Endomyces sp.</i> | |
| 4. |
Smaller bubbles are a nuisance to the fermenters. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Which of the following is not a surface active solute? |
| A. | Alcohol sulfates |
| B. | Alkylbenzene sulfonates |
| C. | Phosphoric acid esters |
| D. | Halogen salts |
| Answer» E. | |
| 6. |
Which of the following does not influence the mass transfer? |
| A. | Types of cells |
| B. | Anatomy of cells |
| C. | Morphology of cells |
| D. | Concentration of cells |
| Answer» C. Morphology of cells | |
| 7. |
What is the change of using antifoaming agents on KLa? |
| A. | K<sub>L</sub>a increases |
| B. | K<sub>L</sub>a decreases |
| C. | K<sub>L</sub>a becomes constant |
| D. | No effect |
| Answer» B. K<sub>L</sub>a decreases | |
| 8. |
Which of the following law affects the mass transfer due to pressure? |
| A. | Henry s law |
| B. | Kohlrausch law |
| C. | Hardy-Weinberg law |
| D. | Hardy-Schulze law |
| Answer» B. Kohlrausch law | |
| 9. |
What happens to the value of KLa if the temperature is raised more than 40 C? |
| A. | Decreases |
| B. | Become zero |
| C. | Increases |
| D. | Becomes constant |
| Answer» B. Become zero | |
| 10. |
Which of the following agitator is required for mixing of highly viscous liquid and slurries? |
| A. | Turbine |
| B. | Vaned discs |
| C. | Paddle |
| D. | Anchor |
| Answer» E. | |
| 11. |
Who reported that sparger design does not affect KLa? |
| A. | Hassan and Robinson |
| B. | Tuffile and Pinho |
| C. | Taguchi and Roels |
| D. | Riet and Tramper |
| Answer» B. Tuffile and Pinho | |
| 12. |
What results in impeller flooding? |
| A. | Increase impeller speed |
| B. | Increases gas velocity |
| C. | Decrease impeller speed |
| D. | Decrease gas velocity |
| Answer» C. Decrease impeller speed | |
| 13. |
What happens to the value of KLa if aeration is lowered in the fermenter? |
| A. | Becomes zero |
| B. | Increases |
| C. | Becomes constant |
| D. | Decreases |
| Answer» C. Becomes constant | |
| 14. |
The value of KLa increases with ____________ in agitation speed (rpm). |
| A. | Decrease |
| B. | Increase |
| C. | Constancy |
| D. | Zero |
| Answer» C. Constancy | |
| 15. |
The smaller the size of the bubble the __________ is the value of KLa. |
| A. | Higher |
| B. | Lower |
| C. | Zero |
| D. | Constant |
| Answer» B. Lower | |
| 16. |
Which of the following is not the factor affecting the value of KLa? |
| A. | Bubble size |
| B. | Temperature |
| C. | Solubility |
| D. | pH |
| Answer» E. | |