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Building Materials - Section 7 Multiple Questions and Answers.
| 26. | Bitumen felt is used for | ||
| A. | water proofing | ||
| B. | damp proofing | ||
| C. | both (a) and (b) | ||
| D. | neither (a) nor (b). | ||
| 27. | According to ISI, bitumen is classified into | ||
| A. | 2 grades | ||
| B. | 4 grades | ||
| C. | 6 grades | ||
| D. | 10 grades. | ||
| 28. | Lime putty | ||
| A. | is made from hydraulic lime | ||
| B. | is made by adding lime to water | ||
| C. | can be used only upto three days | ||
| D. | all of above. | ||
| 29. | The minimum percentage of silica, alumina and ferric oxide in lime for white washing, is | ||
| A. | 20 | ||
| B. | 15 | ||
| C. | 10 | ||
| D. | 0 | ||
| 30. | For a 50 kg cement bag water required, is | ||
| A. | 16.5 litres | ||
| B. | 18.5 litres | ||
| C. | 20.5 litres | ||
| D. | 22.5 litres | ||
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