MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The following data pertains to a hollow cylinder and a hollow sphere made of same material and having the same temperature drop over the wall thicknessInside radius = 0.1 m and outside surface area = 1 square meter |
| A. | nIf the outside radius for both the geometrics is same, calculate the ratio of heat flow in the cylinder to that of sphere? |
| B. | 0.056 |
| C. | 2.345 |
| D. | 1.756 |
| E. | 3.543 |
| Answer» D. 1.756 | |
| 2. |
If we increase the thickness of insulation of a circular rod, heat loss to surrounding due to |
| A. | Convection and conduction increases |
| B. | Convection and conduction decreases |
| C. | Convection decreases while that due to conduction increases |
| D. | Convection increases while that due to conduction decreases |
| Answer» E. | |
| 3. |
A spherical vessel of 0.5 m outside diameter is insulated with 0.2 m thickness of insulation of thermal conductivity 0.04 W/m degree. The surface temperature of the vessel is 195 degree Celsius and outside air is at 10 degree Celsius. Determine heat flow |
| A. | 47.93 W |
| B. | 57.93 W |
| C. | 67.93 W |
| D. | 77.93 W |
| Answer» C. 67.93 W | |
| 4. |
A spherical vessel of 0.5 m outside diameter is insulated with 0.2 m thickness of insulation of thermal conductivity 0.04 W/m degree. The surface temperature of the vessel is 195 degree Celsius and outside air is at 10 degree Celsius. Determine heat flow per m2 based on inside area |
| A. | 63.79 W/m<sup>2</sup> |
| B. | 73.79 W/m<sup>2</sup> |
| C. | 83.79 W/m<sup>2</sup> |
| D. | 93.79 W/m<sup>2</sup> |
| Answer» C. 83.79 W/m<sup>2</sup> | |