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Building Materials - Section 2 Multiple Questions and Answers.
| 21. | The main constituent of fly-ash, is | ||
| A. | aluminium oxide | ||
| B. | silica | ||
| C. | ferrous oxide | ||
| D. | All of these. | ||
| 22. | Bitumen in | ||
| A. | solid state, is called asphalt | ||
| B. | semi fluid state, is called mineral tar | ||
| C. | fluid state, is called petroleum | ||
| D. | all the above. | ||
| 23. | The plastics made from cellulose resin | ||
| A. | are as clear as glass | ||
| B. | are tough and strong | ||
| C. | possess excellent electrical properties | ||
| D. | All the above. | ||
| 24. | Kaolin is chemically classified as | ||
| A. | metamorphic rock | ||
| B. | argillaceous rock | ||
| C. | calcareous rock | ||
| D. | silicious rock. | ||
| 25. | Which one of the following is acid resistant asbestos: | ||
| A. | actinolite asbestos | ||
| B. | amosite asbestos | ||
| C. | anthophylite asbestos | ||
| D. | All the above. | ||
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