MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Food Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Rayleigh number is _____ |
| A. | Product of schmidst and grashof number |
| B. | Total mass transferred by mass transferred due to molecular diffusion |
| C. | Product of schmidst and reynold number |
| D. | None of the mentioned |
| Answer» B. Total mass transferred by mass transferred due to molecular diffusion | |
| 2. |
Sherwood number is _____ |
| A. | Product of schmidst and grashof number |
| B. | Total mass transferred by mass transferred due to molecular diffusion |
| C. | Product of schmidst and reynold number |
| D. | None of the mentioned |
| Answer» C. Product of schmidst and reynold number | |
| 3. |
Which of the following is also called Oxygen balancing method? |
| A. | Dynamic gassing out method |
| B. | Static method |
| C. | Sulphite oxidation method |
| D. | None of the mentioned |
| Answer» C. Sulphite oxidation method | |
| 4. |
Which of the following is not a measuring technique of KLa? |
| A. | Dynamic gassing out method |
| B. | Static method |
| C. | Sulphite oxidation method |
| D. | None of the mentioned |
| Answer» E. | |
| 5. |
Statement 1: KLa is measured together and not separately. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Which theory proposes that the film is continuously getting renewed and replaced by the bulk liquid? |
| A. | Film theory |
| B. | Penetration theory |
| C. | Surface renewal theory |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 7. |
Statement 1: In film theory, mass transfer coefficient is proportional to D1/2Statement 2: Penetration theory states that all elements are exposed at the same time which is unrealistic. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 8. |
Statement 1: Penetration theory states that mass transfer coefficient is directly proportional to diffusivity coefficient which was later proved wrong.Statement 2: Penetration theory states that mass transfer is based on unsteady mass transfer. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 9. |
The existence of a thick constant film between two phases is a proposal by which of the following theories? |
| A. | Film theory |
| B. | Penetration theory |
| C. | Surface renewal theory |
| D. | All of the mentioned |
| Answer» B. Penetration theory | |
| 10. |
Statement 1: Concentration is a product of diffusivity and solubility.Statement 2: Permeability coefficient in case of food packaging can be written as product of partial pressure and solubility using Henry s law. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |