| 31. | Which one is having highest thermal conductivity? |
| a. | Silver |
| b. | Copper |
| c. | Glass |
| d. | Earth |
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Answer: (a).Silver
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| 32. | What is the thermal conductivity of magnetite in W/m K? |
| a. | 3.7 |
| b. | 3.8 |
| c. | 3.9 |
| d. | 4.0 |
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Answer: (b).3.8
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| 33. | Which one is having lowest thermal conductivity? |
| a. | Furnace |
| b. | Wool |
| c. | Saw dust |
| d. | Glass wool |
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Answer: (d).Glass wool
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| 34. | What is the thermal conductivity of coal in W/m K? |
| a. | 0.25 |
| b. | 0.26 |
| c. | 0.27 |
| d. | 0.28 |
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Answer: (b).0.26
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| 35. | What is the thermal conductivity of cotton in W/m K? |
| a. | 0.03 |
| b. | 0.04 |
| c. | 0.05 |
| d. | 0.06 |
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Answer: (d).0.06
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