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Building Materials - Section 1 Multiple Questions and Answers.
| 31. | The rocks formed by gradual deposition, are called | ||
| A. | sedimentary rocks | ||
| B. | igneous rocks | ||
| C. | metamorphic rocks | ||
| D. | none of these. | ||
| 32. | Galvanising means covering iron with a thin coat of | ||
| A. | tin | ||
| B. | zinc | ||
| C. | glaze | ||
| D. | coal tar. | ||
| 33. | For preparing porcelains, the clay should be | ||
| A. | sufficiently pure | ||
| B. | of high degree of tanacity | ||
| C. | of good plasticity | ||
| D. | All the above. | ||
| 34. | Polymerization helps to improve the property of | ||
| A. | strength | ||
| B. | rigidity | ||
| C. | elasticity | ||
| D. | all of these. | ||
| 35. | Good quality stones must | ||
| A. | be durable | ||
| B. | be free from clay | ||
| C. | resist action of acids | ||
| D. | all the above. | ||
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