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Building Materials - Section 7 Multiple Questions and Answers.
| 31. | The presence of sand in brick earth prevents: | ||
| A. | cracking of bricks | ||
| B. | shrinkage of bricks | ||
| C. | warping of bricks | ||
| D. | none of these. | ||
| 32. | The property by virtue of which lime sets under water, is known as | ||
| A. | slacking | ||
| B. | setting | ||
| C. | hydraulicity | ||
| D. | calcining. | ||
| 33. | Percentage content of silica in window glass, is | ||
| A. | 40 to 45 | ||
| B. | 50 to 55 | ||
| C. | 60 to 65 | ||
| D. | 70 to 75. | ||
| 34. | The coefficient of hardness of stones used in road work should be greater than | ||
| A. | 10 | ||
| B. | 12 | ||
| C. | 15 | ||
| D. | 17 | ||
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