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. |
The renowned equation used to calculate the pressure drop in a non-ideal packed bed is known as______________ |
| A. | Sieder Tate Equation |
| B. | Kozeny Carman Equation |
| C. | Ergun Equation |
| D. | Arrhenius Equation |
| Answer» D. Arrhenius Equation | |
| 2. |
Which one is the correct temperature profile for very low dp/di packed bed setup? |
| A. | Laminar temperature profile |
| B. | Turbulent Temperature profile |
| C. | Laminar near the walls and turbulent at the centre |
| D. | Turbulent near the walls and laminar at the centre |
| Answer» B. Turbulent Temperature profile | |
| 3. |
Which one is the correct temperature profile for high dp/di Packed bed setup? |
| A. | Laminar temperature profile |
| B. | Turbulent Temperature profile |
| C. | Laminar near the walls and turbulent at the centre |
| D. | Turbulent near the walls and laminar at the centre |
| Answer» D. Turbulent near the walls and laminar at the centre | |
| 4. |
For very high dp/di, the mixing is very large and the heat transfer coefficient is ______ |
| A. | Low |
| B. | Very low |
| C. | High |
| D. | Very high |
| Answer» D. Very high | |
| 5. |
For very low dp/di, the temperature pattern is similar to that of complete mixing and turbulent flow. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
The value of dp/di in the range _______ gives maximum heat transfer coefficient. |
| A. | 0.15-0.2 |
| B. | 2-3 |
| C. | 0.6-0.9 |
| D. | 0.001-0.002 |
| Answer» B. 2-3 | |
| 7. |
In the expression given below, what is the expression Di? This given ratio defines voidage which is controlled to obtain maximum heat transfer coefficient.
|
| A. | Internal diameter of Pellets |
| B. | Internal diameter of Tube |
| C. | Internal diameter of Bed |
| D. | Internal diameter of Pellets |
| Answer» C. Internal diameter of Bed | |
| 8. |
The heat transfer coefficient ________ with increasing flow rate. |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | Drops drastically |
| Answer» C. Remains the same | |
| 9. |
The presence of particles makes the inside heat transfer coefficient higher than empty tube because the superficial velocity is _______ the actual velocity. |
| A. | Little higher than |
| B. | Very higher than |
| C. | Very less than |
| D. | Little less than |
| Answer» C. Very less than | |
| 10. |
Which one of the following is the correct velocity profile of a packed bed setup? |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q6a.png"><img alt="The correct velocity profile of a packed bed setup - option a" class="alignnone size-full wp-image-247416" height="189" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q6a.png" width="141"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q6b.png"><img alt="The correct velocity profile of a packed bed setup - option b" class="alignnone size-full wp-image-247417" height="184" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q6b.png" width="134"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q6c.png"><img alt="The correct velocity profile of a packed bed setup - option c" class="alignnone size-full wp-image-247418" height="192" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q6c.png" width="125"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q6d.png"><img alt="The correct velocity profile of a packed bed setup - option d" class="alignnone size-full wp-image-247419" height="166" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q6d.png" width="116"/></a> |
| Answer» E. | |
| 11. |
The particles are usually _______ packed near the wall of the tube. |
| A. | Tightly |
| B. | Loosely |
| C. | Very tightly |
| D. | Negligibly |
| Answer» C. Very tightly | |
| 12. |
Which one of the following is the correct Temperature profile for a Packed Bed Heat transfer Equipment? |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/tough-heat-transfer-operations-questions-answers-q1a.png"><img alt="Temperature profile for a Packed Bed Heat transfer Equipment - option a" class="alignnone size-full wp-image-249812" height="221" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/tough-heat-transfer-operations-questions-answers-q1a.png" width="153"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q1b.png"><img alt="Temperature profile for a Packed Bed Heat transfer Equipment - option b" class="alignnone size-full wp-image-247410" height="217" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q1b.png" width="146"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q1c.png"><img alt="Temperature profile for a Packed Bed Heat transfer Equipment - option c" class="alignnone size-full wp-image-247411" height="215" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q1c.png" width="161"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q1d.png"><img alt="Temperature profile for a Packed Bed Heat transfer Equipment - option d" class="alignnone size-full wp-image-247412" height="224" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q1d.png" width="160"/></a> |
| Answer» C. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q1c.png"><img alt="Temperature profile for a Packed Bed Heat transfer Equipment - option c" class="alignnone size-full wp-image-247411" height="215" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q1c.png" width="161"/></a> | |