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. |
Statement 1: Drop-wise condensation takes place on a smooth surface.Statement 2: All the resistance to heat transfer lies in the film formed during Film-type condensation. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 2. |
Statement 1: Film-type condensation has a higher heat transfer co-efficient than drop-wise condensation.Statement 2: Drop-wise condensation is easier to maintain than Film-type condensation |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» D. False, True | |
| 3. |
The reciprocal of heat transfer co-efficient is _____ |
| A. | Conductance |
| B. | Resistance |
| C. | Density |
| D. | Temperature difference |
| Answer» C. Density | |
| 4. |
Statement 1: hd/k is _____Statement 2: _____ is the ratio of convective heat transfer to conductive heat transfer. |
| A. | Prandtl number, Prandtl number |
| B. | Nussel number, Nussel number |
| C. | Pictet number, Pictet number |
| D. | Fourier number, Fourier number |
| Answer» C. Pictet number, Pictet number | |
| 5. |
Why is better to use a Jacketed vessel in the dairy industry than a stainless steel container directly? |
| A. | To prevent milk from charring |
| B. | To have a better temperature control |
| C. | The temperature of food in the film = temperature of the wall which is very high. Hence, jacketed vessels are needed |
| D. | All of the mentioned |
| Answer» E. | |
| 6. |
Statement 1: NPr= (Cp μ)/kStatement 2: If NPr is lesser than 1, Thermal Boundary layer is thinner than Hydrodynamic Boundary layer. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» B. True, True | |
| 7. |
Statement 1: When heat transfer takes between a solid surface and a fluid, an insulating film layer is formed. More is the agitation; more is the thickness of the film.Statement 2: Within the film, the temperature varies from the wall to the temperature of the bulk. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 8. |
Statement 1: Nucleate Boiling is when a layer of film is formed in the beginning.Statement 2: Boiling starts with the bottom layer which heats up, becomes light and goes up. That way everything becomes hot and there is not temperature difference and hence no heat transfer. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 9. |
__________ is when nucleate boiling transforms to film boiling. |
| A. | Critical temperature |
| B. | Leiden frost point |
| C. | Critical temperature & Leiden frost point |
| D. | None of the mentioned |
| Answer» C. Critical temperature & Leiden frost point | |
| 10. |
Which of the following is true about Natural Convection? |
| A. | Low heat transfer |
| B. | Due to gravity and natural buoyant forces |
| C. | Dependent on viscosity, density and thermal conductivity |
| D. | All of the mentioned |
| Answer» E. | |