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Building Materials - Section 4 Multiple Questions and Answers.
| 16. | Cement paints usually | ||
| A. | contain hydrated lime | ||
| B. | contain 5% to 10% colour pigments | ||
| C. | are prepared with white cement | ||
| D. | all the above. | ||
| 17. | The cement becomes unsound by the presence of excess | ||
| A. | sulphur | ||
| B. | magnesia | ||
| C. | lime | ||
| D. | All of these. | ||
| 18. | The minimum compressive strength of 1st class bricks should be | ||
| A. | 75 kg/cm2 | ||
| B. | 90 kg/cm2 | ||
| C. | 100 kg/cm2 | ||
| D. | 120 kg/cm2 | ||
| 19. | A volatile substance added to a paint to make its application easy and smooth, is known as | ||
| A. | base | ||
| B. | solvent | ||
| C. | vehicle | ||
| D. | none to these. | ||
| 20. | The percentage of water for normal consistency, is | ||
| A. | 5% to 15% | ||
| B. | 10% to 25% | ||
| C. | 15% to 25% | ||
| D. | 25% to 35%. | ||
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