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. |
For the calculation of critical radius of insulation for a cylindrical tube, which of the following differentiation is correct? |
| A. | ( frac{d( frac{K}{HR_2}+ln( frac{R_2}{R_1}))}{dR_1} ) = 0 |
| B. | ( frac{d( frac{K}{HR_1}+ln( frac{R_2}{R_1}))}{dR_2} ) = 0 |
| C. | ( frac{d( frac{K}{HR_2}+ln( frac{R_1}{R_2}))}{dR_1} ) = 0 |
| D. | ( frac{d( frac{K}{HR_2}+ln( frac{R_2}{R_1}))}{dR_2} ) = 0 |
| Answer» E. | |
| 2. |
What is critical thickness of insulation for a spherical insulator? |
| A. | <sup>K</sup> <sub>H</sub> |
| B. | ( frac{2K}{H} ) |
| C. | ( frac{4K}{H} ) |
| D. | <sup>H</sup> <sub>K</sub> |
| Answer» C. ( frac{4K}{H} ) | |
| 3. |
Which one of the following figures correctly shows the dotted line at the point of critical radius/ maximum heat transfer rate for a cylindrical tube wall? |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12a.png"><img alt="Line at point of critical radius heat transfer rate for cylindrical tube wall - option a" class="alignnone size-full wp-image-246515" height="394" sizes="(max-width: 567px) 100vw, 567px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12a.png 567w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12a-300x208.png 300w" width="567"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12b.png"><img alt="Line at point of critical radius heat transfer rate for cylindrical tube wall - option b" class="alignnone size-full wp-image-246516" height="403" sizes="(max-width: 565px) 100vw, 565px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12b.png 565w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12b-300x214.png 300w" width="565"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12c.png"><img alt="Line at point of critical radius heat transfer rate for cylindrical tube wall - option c" class="alignnone size-full wp-image-246517" height="407" sizes="(max-width: 571px) 100vw, 571px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12c.png 571w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12c-300x214.png 300w" width="571"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12d.png"><img alt="Line at point of critical radius heat transfer rate for cylindrical tube wall - option d" class="alignnone size-full wp-image-246518" height="402" sizes="(max-width: 570px) 100vw, 570px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12d.png 570w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12d-300x212.png 300w" width="570"/></a> |
| Answer» D. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12d.png"><img alt="Line at point of critical radius heat transfer rate for cylindrical tube wall - option d" class="alignnone size-full wp-image-246518" height="402" sizes="(max-width: 570px) 100vw, 570px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12d.png 570w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q12d-300x212.png 300w" width="570"/></a> | |
| 4. |
Recognize the correct heat transfer rate pattern for critical radius of insulation. |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11a.png"><img alt="The correct heat transfer rate pattern for critical radius of insulation - option a" class="alignnone size-full wp-image-246510" height="237" sizes="(max-width: 342px) 100vw, 342px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11a.png 342w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11a-300x208.png 300w" width="342"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11b.png"><img alt="The correct heat transfer rate pattern for critical radius of insulation - option b" class="alignnone size-full wp-image-246511" height="240" sizes="(max-width: 343px) 100vw, 343px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11b.png 343w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11b-300x210.png 300w" width="343"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11c.png"><img alt="The correct heat transfer rate pattern for critical radius of insulation - option c" class="alignnone size-full wp-image-246512" height="248" sizes="(max-width: 349px) 100vw, 349px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11c.png 349w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11c-300x213.png 300w" width="349"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11d.png"><img alt="The correct heat transfer rate pattern for critical radius of insulation - option d" class="alignnone size-full wp-image-246513" height="241" sizes="(max-width: 348px) 100vw, 348px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11d.png 348w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11d-300x208.png 300w" width="348"/></a> |
| Answer» C. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11c.png"><img alt="The correct heat transfer rate pattern for critical radius of insulation - option c" class="alignnone size-full wp-image-246512" height="248" sizes="(max-width: 349px) 100vw, 349px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11c.png 349w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q11c-300x213.png 300w" width="349"/></a> | |
| 5. |
What is Critical radius of insulation? |
| A. | The maximum radius that can allow heat transfer |
| B. | The maximum heat transfer coefficient at a maximum possible radius |
| C. | The radius at which maximum heat transfer rate is observed |
| D. | The minimum radius at which maximum heat transfer rate is observed |
| Answer» D. The minimum radius at which maximum heat transfer rate is observed | |
| 6. |
What is the critical radius of insulation for a cylindrical wall? |
| A. | ( frac{K}{H} ) |
| B. | ( frac{4K}{H} ) |
| C. | ( frac{K}{4H} ) |
| D. | ( frac{H}{K} ) |
| Answer» B. ( frac{4K}{H} ) | |
| 7. |
When we want to heat a stream of liquid by Steam, we usually keep removing the condensate from the surface of the tube. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
When we want to heat a stream of liquid by Steam, and the steam may condense into liquid. Then which of the following is best suited? |
| A. | Steam on the side with the fins |
| B. | Steam on the side with the fins and condensate drainage |
| C. | Steam on the side with the fins and a brush to remove the condensate film from surface |
| D. | Steam on the tube with the fins on inner surface of the tube passing through a pool of cooling liquid |
| Answer» D. Steam on the tube with the fins on inner surface of the tube passing through a pool of cooling liquid | |
| 9. |
How many Heat Exchangers can be classified on the basis of phase change of the fluids? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 10. |
In which one of the following, Heat transfer takes place without any Conduction or Convection? |
| A. | Condenser |
| B. | Recuperators |
| C. | Cooling tower |
| D. | Shell and Tube HE |
| Answer» D. Shell and Tube HE | |
| 11. |
Which is the correct temperature regime for combined Conduction and Natural Convection through a conducting wall? |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-interview-questions-answers-q2a.png"><img alt="Temperature regime for combined Conduction & Natural Convection - option a" class="alignnone size-full wp-image-249716" height="247" sizes="(max-width: 338px) 100vw, 338px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-interview-questions-answers-q2a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-interview-questions-answers-q2a.png 338w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-interview-questions-answers-q2a-300x219.png 300w" width="338"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2b.png"><img alt="Temperature regime for combined Conduction & Natural Convection - option b" class="alignnone size-full wp-image-246505" height="233" sizes="(max-width: 345px) 100vw, 345px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2b.png 345w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2b-300x203.png 300w" width="345"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2c.png"><img alt="Temperature regime for combined Conduction & Natural Convection - option c" class="alignnone size-full wp-image-246506" height="299" sizes="(max-width: 434px) 100vw, 434px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2c.png 434w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2c-300x207.png 300w" width="434"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2d.png"><img alt="Temperature regime for combined Conduction & Natural Convection - option d" class="alignnone size-full wp-image-246507" height="246" sizes="(max-width: 357px) 100vw, 357px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2d.png 357w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2d-300x207.png 300w" width="357"/></a> |
| Answer» C. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2c.png"><img alt="Temperature regime for combined Conduction & Natural Convection - option c" class="alignnone size-full wp-image-246506" height="299" sizes="(max-width: 434px) 100vw, 434px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2c.png 434w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q2c-300x207.png 300w" width="434"/></a> | |
| 12. |
In a Heat Exchanger, heat cannot be transferred by all the three means, that is Conduction, Convection and Radiation simultaneously. |
| A. | True |
| B. | False |
| Answer» B. False | |