MCQOPTIONS
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MCQOPTIONS
This section includes 3 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. |
Mark the false statement regarding effectiveness of fin |
| A. | A high value of film coefficient adversely affects the fin effectiveness |
| B. | Fin effectiveness is improved if the fin is made from a material of low conductivity |
| C. | Fin effectiveness is improved by having thin fins |
| D. | It can also be improved by having closely spaced fins |
| Answer» C. Fin effectiveness is improved by having thin fins | |
| 2. |
Let us assume a square section fin split longitudinally and used as two fins. This will result in |
| A. | Increase or decrease in heat transfer depending on the material of fin |
| B. | Heat flow remains constant |
| C. | Decrease in heat transfer |
| D. | Increase in heat transfer |
| Answer» E. | |
| 3. |
The handle of a saucepan, 30 cm long and 2 cm in diameter, is subjected to 100 degree Celsius temperature during a certain cooking operation. The average unit surface conductance over the handle surface is 7.35 W/m2 degree in the kitchen air at 24 degree Celsius. The cook is likely to grasp the last 10 cm of the handle and hence the temperature in this region should not exceed 38 degree Celsius. What should be the thermal conductivity of the handle material to accomplish it? The handle may be treated as a fin insulated at the tip |
| A. | 18.36 W/m degree |
| B. | 17.36 W/m degree |
| C. | 16.36 W/m degree |
| D. | 15.36 W/m degree |
| Answer» C. 16.36 W/m degree | |