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. |
Which of the following evaporator cannot be used for milk? |
| A. | Scraped surface evaporators |
| B. | Fluidized bed evaporators |
| C. | Plate-and-frame type evaporators |
| D. | Batch Pan |
| Answer» C. Plate-and-frame type evaporators | |
| 2. |
What is the important factor which is employed for heat sensitive materials in an evaporator ? |
| A. | High pressure |
| B. | Vacuum |
| C. | High residence time |
| D. | High temperature |
| Answer» C. High residence time | |
| 3. |
Which of the following evaporator separates volatile and nonvolatile compounds? |
| A. | Falling film evaporators |
| B. | Vertical type evaporators |
| C. | Climbing film type evaporators |
| D. | Forced circulation evaporators |
| Answer» B. Vertical type evaporators | |
| 4. |
Which of the following evaporator is not used for heat sensitive materials? |
| A. | Vacuum evaporators |
| B. | Vertical type evaporators |
| C. | Plate-and-frame type evaporators |
| D. | Agitated thin-film evaporators |
| Answer» C. Plate-and-frame type evaporators | |
| 5. |
Are these statements about the distillateto concentrate ratio in evaporators true?Statement 1: Lack of wall wetting causes fouling. |
| A. | nStatement 2: Fouling depends on the fluid velocity. |
| B. | True, False |
| C. | True, True |
| D. | False, True |
| E. | False, False |
| Answer» C. True, True | |
| 6. |
Which of the following can be evaporated in plate-and-frame or agitated thin-film evaporator? |
| A. | High viscosity, heavy solids, high tendency to foul |
| B. | Heavy solids, high tendency to foul |
| C. | High viscosity, heavy solids, |
| D. | High viscosity, high tendency to foul |
| Answer» B. Heavy solids, high tendency to foul | |
| 7. |
Are these statements about the gasketed plate-and-frame evaporators true?Statement 1: Gasketed plate-and-frame evaporators are not used for heat sensitive materials. |
| A. | nStatement 2: These systems are operated as rising-film, falling-film evaporators. |
| B. | True, False |
| C. | True, True |
| D. | False, True |
| E. | False, False |
| Answer» D. False, True | |
| 8. |
What are the applications of agitated thin-film evaporators? |
| A. | Purification of sensitive organic chemicals |
| B. | Vapor recompression for energy recovery |
| C. | Devolatilization of thermoplastics |
| D. | Devolatilization of thermoplastics and purification of sensitive organic chemicals |
| Answer» E. | |
| 9. |
What type of evaporators used for heat sensitive materials? |
| A. | Vacuum evaporators |
| B. | Vertical type evaporators |
| C. | Climbing film type evaporators |
| D. | Forced circulation evaporators |
| Answer» B. Vertical type evaporators | |
| 10. |
What are conditions to achieve maximum retention of volatile constituents? |
| A. | Short residence time and low pressure |
| B. | Short residence time and high pressure |
| C. | Long residence time and low pressure |
| D. | Long residence time and high pressure |
| Answer» B. Short residence time and high pressure | |