MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
Recognize the falling film evaporator. |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/advanced-heat-transfer-operations-questions-answers-q12a.png"><img alt="The falling film evaporator - option a" class="alignnone size-full wp-image-249848" height="305" sizes="(max-width: 376px) 100vw, 376px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/advanced-heat-transfer-operations-questions-answers-q12a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/advanced-heat-transfer-operations-questions-answers-q12a.png 376w, https://www.sanfoundry.com/wp-content/uploads/2019/10/advanced-heat-transfer-operations-questions-answers-q12a-300x243.png 300w, https://www.sanfoundry.com/wp-content/uploads/2019/10/advanced-heat-transfer-operations-questions-answers-q12a-100x80.png 100w" width="376"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-falling-film-evaporator-q12b.png"><img alt="The falling film evaporator - option b" class="alignnone size-full wp-image-248044" height="309" sizes="(max-width: 367px) 100vw, 367px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-falling-film-evaporator-q12b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-falling-film-evaporator-q12b.png 367w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-falling-film-evaporator-q12b-300x253.png 300w" width="367"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-falling-film-evaporator-q12c.png"><img alt="The falling film evaporator - option c" class="alignnone size-full wp-image-248045" height="290" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-falling-film-evaporator-q12c.png" width="230"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-falling-film-evaporator-q12d.png"><img alt="The falling film evaporator - option d" class="alignnone size-full wp-image-248046" height="228" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-falling-film-evaporator-q12d.png" width="209"/></a> |
| Answer» C. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-falling-film-evaporator-q12c.png"><img alt="The falling film evaporator - option c" class="alignnone size-full wp-image-248045" height="290" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-falling-film-evaporator-q12c.png" width="230"/></a> | |
| 2. |
In order to maintain conservation of mass as this fluid fall proceeds in a falling film evaporator, the downward vapour velocity ___________ |
| A. | Decreases |
| B. | Increases |
| C. | Remains Same |
| D. | Oscillates |
| Answer» C. Remains Same | |
| 3. |
The fluids in falling tube evaporator usually form a film inside the tubes but there are applications when the fluid forms a film outside the tube and falls subsequently. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Which one of the following cannot be regarded as a demerit of falling film evaporator? |
| A. | High headroom requirement |
| B. | Corrosive fluids cannot be used |
| C. | Large product holdup |
| D. | Recirculation needed |
| Answer» D. Recirculation needed | |
| 5. |
Which one of the following is not an advantage of falling film evaporator? |
| A. | Relatively low cost |
| B. | High headroom |
| C. | Large surface area for heating available |
| D. | Low product holdup |
| Answer» C. Large surface area for heating available | |
| 6. |
Falling film evaporators have __________ product holdup. |
| A. | Large |
| B. | Very high |
| C. | Low |
| D. | Zero |
| Answer» D. Zero | |
| 7. |
Falling film evaporators are best suited for pharmaceutical industries because |
| A. | It has high temperature gradient and natural convection |
| B. | Low pressure |
| C. | It has less temperature gradient and natural convection |
| D. | High headroom available |
| Answer» D. High headroom available | |
| 8. |
The applications of falling film and rising film are more or less same, but if industries have the cost capital, they go for falling film, why? |
| A. | It has high temperature gradient and natural convection |
| B. | Better efficiency of falling film |
| C. | It has less temperature gradient and natural convection |
| D. | No need for upward pressure |
| Answer» C. It has less temperature gradient and natural convection | |
| 9. |
Falling film evaporators are considered over climbing film evaporators because of which one of the following factor? |
| A. | Efficiency |
| B. | Product holdup |
| C. | Driving force requirement |
| D. | Temperature sensitivity |
| Answer» B. Product holdup | |
| 10. |
Falling film evaporators can be operated in _______________ |
| A. | Counter-flow with the vapour |
| B. | Co-current flow with vapour |
| C. | Both co-current and counter-current |
| D. | Separate segments in any direction |
| Answer» D. Separate segments in any direction | |
| 11. |
Falling film evaporators are a subclass of long tube evaporators. |
| A. | True |
| B. | False |
| Answer» B. False | |