MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer Operations knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which one of the following is a Long tube evaporator? |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12a.png"><img alt="The following is a Long tube evaporator - option a" class="alignnone size-full wp-image-248035" height="234" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12a.png" width="184"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12b.png"><img alt="The following is a Long tube evaporator - option b" class="alignnone size-full wp-image-248036" height="233" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12b.png" width="197"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12c.png"><img alt="The following is a Long tube evaporator - option c" class="alignnone size-full wp-image-248037" height="205" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12c.png" width="186"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12d.png"><img alt="The following is a Long tube evaporator - option d" class="alignnone size-full wp-image-248038" height="161" sizes="(max-width: 204px) 100vw, 204px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12d.png 204w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12d-100x80.png 100w" width="204"/></a> |
| Answer» D. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12d.png"><img alt="The following is a Long tube evaporator - option d" class="alignnone size-full wp-image-248038" height="161" sizes="(max-width: 204px) 100vw, 204px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12d.png 204w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q12d-100x80.png 100w" width="204"/></a> | |
| 2. |
Recognize the correct flow direction in rising film evaporator. |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11a.png"><img alt="The correct flow direction in rising film evaporator - option a" class="alignnone size-full wp-image-248031" height="315" sizes="(max-width: 316px) 100vw, 316px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11a.png 316w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11a-150x150.png 150w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11a-300x300.png 300w" width="316"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11b.png"><img alt="The correct flow direction in rising film evaporator - option b" class="alignnone size-full wp-image-248032" height="308" sizes="(max-width: 304px) 100vw, 304px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11b.png 304w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11b-296x300.png 296w" width="304"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11c.png"><img alt="The correct flow direction in rising film evaporator - option c" class="alignnone size-full wp-image-248033" height="303" sizes="(max-width: 307px) 100vw, 307px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11c.png 307w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11c-300x296.png 300w" width="307"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11d.png"><img alt="The correct flow direction in rising film evaporator - option d" class="alignnone size-full wp-image-248034" height="301" sizes="(max-width: 369px) 100vw, 369px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11d.png 369w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11d-300x245.png 300w" width="369"/></a> |
| Answer» C. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11c.png"><img alt="The correct flow direction in rising film evaporator - option c" class="alignnone size-full wp-image-248033" height="303" sizes="(max-width: 307px) 100vw, 307px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11c.png 307w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-climbing-film-evaporator-q11c-300x296.png 300w" width="307"/></a> | |
| 3. |
Climbing film evaporators are _________ falling film evaporators. |
| A. | Better than |
| B. | Have more efficiency than |
| C. | Not as good as |
| D. | Considered over |
| Answer» D. Considered over | |
| 4. |
Which one of the following is not an advantage of climbing film evaporator? |
| A. | Low residence time |
| B. | High efficiency |
| C. | Low temperature difference required |
| D. | Low pressure operation |
| Answer» C. Low temperature difference required | |
| 5. |
Why are food, pharmaceuticals and sensitive fluids used in climbing tube evaporators? |
| A. | The pressure is very low |
| B. | There is very less temperature gradient |
| C. | The fluid is not exposed to high temperature for a long period of time |
| D. | Its heated by natural convection |
| Answer» D. Its heated by natural convection | |
| 6. |
What is the pressure used for thermal desalination of water in climbing film evaporators? |
| A. | Close to zero |
| B. | Very high around 3-4atm |
| C. | Atmospheric pressure |
| D. | Just below 1atm |
| Answer» B. Very high around 3-4atm | |
| 7. |
Which one of the following is not a use of climbing tube evaporator? |
| A. | Thermal desalination |
| B. | Juice concentration |
| C. | Pharmaceuticals |
| D. | Feed-water purification |
| Answer» E. | |
| 8. |
How does the fluid in climbing film evaporator rise in the tubes? |
| A. | There is a pump at the bottom that pushes it |
| B. | Pressure gradient is applied |
| C. | The vapour produced then pushes the fluid upward |
| D. | Temperature gradient causes convection that moves upward |
| Answer» D. Temperature gradient causes convection that moves upward | |
| 9. |
Climbing film evaporators are necessarily Long tube evaporators. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which one of the following statements is correct about the nucleate boiling phenomenon in climbing tube evaporators? |
| A. | There is no nucleate boiling |
| B. | There is nucleate boiling throughout |
| C. | Nucleate boiling near the entrance but not later |
| D. | Nucleate boiling near the exit and nowhere else |
| Answer» D. Nucleate boiling near the exit and nowhere else | |
| 11. |
Which one of the following statement is incorrect about the factors leads to single effect operation of climbing film evaporator? |
| A. | When the vapour is contaminated and cannot be recycled |
| B. | The feed is highly corrosive, requiring expensive construction materials |
| C. | The liquid has low vapour pressure |
| D. | The energy cost to produce the steam heating is low |
| Answer» D. The energy cost to produce the steam heating is low | |
| 12. |
Climbing film evaporator can be used only as a single effect evaporator. |
| A. | True |
| B. | False |
| Answer» C. | |