MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
What factors affect heat transfer coefficient? |
| A. | Viscosity, density, specific heat |
| B. | Viscosity |
| C. | Density |
| D. | Specific heat |
| Answer» B. Viscosity | |
| 2. |
How do you increase heat transfer coefficient? |
| A. | By increasing Reynolds number |
| B. | By decreasing Reynolds number |
| C. | By increasing velocity |
| D. | By increasing Reynolds number and velocity |
| Answer» E. | |
| 3. |
What is meant by heat transfer coefficient? |
| A. | The heat transfer coefficient is the heat transferred per unit volume per kelvin |
| B. | The heat transfer coefficient is the heat transferred per unit area per kelvin |
| C. | The heat transfer coefficient is the heat transferred per unit volume per Celsius |
| D. | The heat transfer coefficient is the heat transferred per unit area per Celsius |
| Answer» C. The heat transfer coefficient is the heat transferred per unit volume per Celsius | |
| 4. |
What are the principle functions of evaporator? |
| A. | Heat exchanger and separator |
| B. | Heat exchanger |
| C. | Heat exchanger |
| D. | Evaporate |
| Answer» B. Heat exchanger | |
| 5. |
Which of the following statements about rate of evaporationare correct?Statement 1: Quantity of heat required to evaporate each kg of water. |
| A. | nStatement 2: Maximum allowable temperature of the liquid, |
| B. | True, False |
| C. | True, True |
| D. | False, True |
| E. | False, False |
| Answer» C. True, True | |
| 6. |
What is conduction? |
| A. | Conduction is heat transfer by means of molecular agitation |
| B. | Conduction is mass transfer by means of molecular agitation |
| C. | Conduction is heat transfer by means of electron agitation |
| D. | Conduction is heat transfer by means of atom agitation |
| Answer» B. Conduction is mass transfer by means of molecular agitation | |
| 7. |
What is the cause of convection heat transfer in evaporators? |
| A. | Convection is heat transfer by neutrons |
| B. | Convection is heat transfer by mass motion of a heat source |
| C. | Convection is mass transfer by mass motion of a fluid |
| D. | Convection is heat transfer by mass motion of a fluid |
| Answer» E. | |
| 8. |
What controls the overall heat transfer coefficient in falling film evaporators? |
| A. | Film thickness |
| B. | Velocity |
| C. | Liquid properties |
| D. | Film thickness, velocity, liquid properties |
| Answer» E. | |
| 9. |
What are modes of heat transfer in evaporators? |
| A. | Conduction and convention |
| B. | Conduction and radiation |
| C. | Radiation and convention |
| D. | Conduction, convention, radiation |
| Answer» B. Conduction and radiation | |