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Building Materials - Section 5 Multiple Questions and Answers.
| 46. | Seasoning of timber is done | ||
| A. | to make it water proof | ||
| B. | to paint its surface | ||
| C. | to increase its temperature | ||
| D. | to remove water. | ||
| 47. | The specific gravity of marble, is | ||
| A. | 2.5 | ||
| B. | 2.6 | ||
| C. | 2.66 | ||
| D. | 2.72 | ||
| 48. | The rocks having alumina or clay as their major constituents, are known as | ||
| A. | siliceous rocks | ||
| B. | argillaceous rocks | ||
| C. | calcareous rocks | ||
| D. | sedimentary rocks | ||
| 49. | The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner, are known as | ||
| A. | knots | ||
| B. | rindgalls | ||
| C. | burls | ||
| D. | none of these. | ||
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