MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Food Processing Unit Operations knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Convective heat transfer coefficients for liquid under forced convection is __________ |
| A. | 0.5 – 1000 (W/(m2K)) |
| B. | 50 – 3000 (W/(m2K)) |
| C. | 10 – 1000 (W/(m2K)) |
| D. | 50 – 10000 (W/(m2K)) |
| Answer» E. | |
| 2. |
Convective heat transfer coefficients for condensing water vapor is __________ |
| A. | 0.5 – 1000 (W/(m2K)) |
| B. | 5 – 100 (W/(m2K)) |
| C. | 10 – 1000 (W/(m2K)) |
| D. | 50 – 10000 (W/(m2K)) |
| Answer» C. 10 – 1000 (W/(m2K)) | |
| 3. |
Convective heat transfer coefficients for air under natural convection is __________ |
| A. | 0.5 – 1000 (W/(m2K)) |
| B. | 50 – 3000 (W/(m2K)) |
| C. | 10 – 1000 (W/(m2K)) |
| D. | 50 – 10000 (W/(m2K)) |
| Answer» B. 50 – 3000 (W/(m2K)) | |
| 4. |
In __________, fluid is forced to flow over a surface or in a tube by external means. |
| A. | natural convection |
| B. | forced convection |
| C. | conduction |
| D. | radiation |
| Answer» C. conduction | |
| 5. |
_________ is the currents produced only by temperature difference. |
| A. | Natural convection |
| B. | Forced convection |
| C. | Conduction |
| D. | Radiation |
| Answer» B. Forced convection | |
| 6. |
Are these statements about the thermal convection true?Statement 1: Thermal convection depends on temperature gradient.Statement 2: It does not depend on relative motion of the fluid. |
| A. | True, False |
| B. | True, True |
| C. | False, True |
| D. | False, False |
| Answer» B. True, True | |
| 7. |
Is conduction faster than convection? |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
___________ is the transfer of thermal energy through the movement of a liquid or gas. |
| A. | Convection |
| B. | Conduction |
| C. | Radiation |
| D. | Evaporation |
| Answer» B. Conduction | |
| 9. |
Which law governs the thermal convection? |
| A. | Fourier’s law |
| B. | Pascal law |
| C. | Newton’s law |
| D. | Stefan-Boltzmann Law |
| Answer» D. Stefan-Boltzmann Law | |
| 10. |
Which of the following example explain convection? |
| A. | The heat from a hot liquid makes the cup itself hot |
| B. | Walking on the beach on a hot summer day will warm the feet |
| C. | A metal spoon becomes hot from the boiling water inside the pot |
| D. | The formation of sea and land breeze |
| Answer» E. | |