MCQOPTIONS
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MCQOPTIONS
This section includes 23 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: In coiled heat exchanger, the coils can be present inside and outside the vessel.Statement 2: The coils can have either hot/cold fluid present inside them or even electrical coils can be present. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 2. |
Statement 1: Plate heat exchangers are used in heat sensitive foods like milk.Statement 2: Principle behind plate heat exchangers is that there is very less space between the plates and hence quick heating can take place. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 3. |
Which of the following heat exchangers are used for the quick exchange of heat? |
| A. | Shell and tube heat exchangers |
| B. | Plate heat exchangers |
| C. | Scraped surface heat exchangers |
| D. | Jacketed Vessels |
| Answer» C. Scraped surface heat exchangers | |
| 4. |
Which of the following is untrue about scraped surface heat exchangers? |
| A. | They’re unsuitable for viscous fluids |
| B. | They’re suitable for fouling fluids |
| C. | They’re used for continuous operation and have a double pipe |
| D. | None of the mentioned |
| Answer» B. They’re suitable for fouling fluids | |
| 5. |
Statement 1: Scraping improves heat transfer co-efficient by 5 times in case of non-Newtonian fluids.Statement 2: In food industry, major physical changes to food items when they’re processed, take place like transformation from Newtonian to Non-Newtonian fluids. Hence, scraped surface heat exchangers are very beneficial. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 6. |
Statement 1: Generally, in small scaled jacketed pans, food products like jams, sauces etc are made.Statement 2: Baffles provide structural support to tubes, but they cannot prevent channeling. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» B. True, True | |
| 7. |
Statement 1: Difference between 1-1 and 1-2 heat exchanger is that 1-2 has both counter AND co current, whereas 1-1 has only co-current.Statement 2: 1-2 heat exchanger requires a high pressure drop. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 8. |
External heat exchangers are gaining popularity as they’ve several advantages over conventional methods. Still, there is a major drawback. Which among the following is it? |
| A. | Some shear-sensitive cells might get damaged due to abrasion |
| B. | It is difficult for pumps to withstand high temperature without leakages of the fluid |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 9. |
STATEMENT_1:_SCRAPING_IMPROVES_HEAT_TRANSFER_CO-EFFICIENT_BY_5_TIMES_IN_CASE_OF_NON-NEWTONIAN_FLUIDS.?$ |
| A. | |
| B. | True, False |
| C. | True, True |
| Answer» C. True, True | |
| 10. |
Which of the following heat exchangers are used for the quick exchange of heat?$ |
| A. | Shell and tube heat exchangers |
| B. | Plate heat exchangers |
| C. | Scraped surface heat exchangers |
| D. | Jacketed Vessels |
| Answer» C. Scraped surface heat exchangers | |
| 11. |
Which_of_the_following_is_untrue_about_scraped_surface_heat_exchangers?$ |
| A. | They’re unsuitable for viscous fluids |
| B. | They’re suitable for fouling fluids |
| C. | They’re used for continuous operation and have a double pipe |
| D. | None of the mentioned |
| Answer» B. They‚Äö√Ñ√∂‚àö√ë‚àö¬•re suitable for fouling fluids | |
| 12. |
Statement 1: In coiled heat exchanger, the coils can be present inside and outside the vessel. |
| A. | |
| B. | True, False |
| C. | True, True |
| Answer» C. True, True | |
| 13. |
Contamination takes place to high extend in Plate heat exchangers. |
| A. | True, the space between plates is too less |
| B. | False, they cannot be used for viscous liquids |
| C. | Cannot be determined |
| D. | True, they can be used for thin liquids only |
| Answer» B. False, they cannot be used for viscous liquids | |
| 14. |
Which of the following is true about Plate heat exchangers? |
| A. | They’re used for Ultra high temperature treatment |
| B. | Used for high temperature and short time |
| C. | They’re used for Ultra high temperature treatment and also Used for high temperature and short time |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 15. |
Statement_1:_Plate_heat_exchangers_are_used_in_heat_sensitive_foods_like_milk. |
| A. | |
| B. | True, False |
| C. | True, True |
| Answer» C. True, True | |
| 16. |
Statement 1: Generally, in small scaled jacketed pans, food products like jams, sauces etc are made? |
| A. | |
| B. | True, False |
| C. | True, True |
| Answer» B. True, False | |
| 17. |
Statement 1: Difference between 1-1 and 1-2 heat exchanger is that 1-2 has both counter AND co current, whereas 1-1 has only co-current. |
| A. | |
| B. | True, False |
| C. | True, True |
| Answer» C. True, True | |
| 18. |
Which of the following is a parameter to be checked before choosing the shape of the pitch in heat exchangers? |
| A. | Easiness to clean |
| B. | High heat transfer |
| C. | Cost |
| D. | All of the mentioned |
| Answer» E. | |
| 19. |
External heat exchangers are gaining popularity as they’ve several advantages over conventional methods. Still, there is a major drawback. Which among the following is it?$ |
| A. | Some shear-sensitive cells might get damaged due to abrasion |
| B. | It is difficult for pumps to withstand high temperature without leakages of the fluid |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 20. |
Which of the following is an advantage of using pumps as heat transfer equipment? |
| A. | No stirrer required |
| B. | Taking them to a heat exchanger where the area used for heat transfer can be easily changed |
| C. | No stirrer required & taking them to a heat exchanger where the area used for heat transfer can be easily changed |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 21. |
In a jacketed vessel, the only way to increase the heat transfer rates is to increase the temperature difference. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 22. |
If _______ heating has higher heat transfer rates than _______ heating, then why is ________ difficult to be used. |
| A. | Direct, Indirect, no difficulty, they’re used |
| B. | Direct, Indirect, coil is difficult to clean and is prone to bacterial growth |
| C. | Indirect, Direct, no difficulty, they’re used |
| D. | Indirect, Direct, coil is difficult to clean and is prone to bacterial growth |
| Answer» C. Indirect, Direct, no difficulty, they‚Äö√Ñ√∂‚àö√ë‚àö¬•re used | |
| 23. |
Which of the following sentences is true? |
| A. | Direct heating has higher heat transfer rates than indirect heating |
| B. | Indirect heating has higher heat transfer rates than direct heating |
| C. | Both of them have the same heat transfer rates |
| D. | Cannot be determined |
| Answer» B. Indirect heating has higher heat transfer rates than direct heating | |