Mechanical Engineering : Heat Transfer QUESTIONS AND ANSWERS :: part1 : 6 to 10
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.Thermal conductivity of air at room temperature in kcal/m hr �C is of the order of |
| 0.002 |
| 0.02 |
| 0.01 |
| 0.1 |
| 0.5. |
7.Thermal conductivity of water at 20�C is of the order of |
| 0.1 |
| 0.23 |
| 0.42 |
| 0.51 |
| 0.64. |
8.Temperature of steam at around 540�C canbe measured by |
| thermometer |
| radiatiouv pyrometer |
| thermistor |
| thermocouple |
| thermopile. |
9.Unit of thermal conductivity in S.I. units is |
| J/m2 sec |
| J/m �K sec |
| W/m �K |
| (a) and (c) above |
| (b) and (c) above. |
10.Cork is a good insulator because it has |
| free electrons |
| atoms colliding frequency |
| low density |
| porous body |
| all of the above. |
More Heat Transfer QUESTIONS AND ANSWERS available in next pages
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