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Building Materials - Section 3 Multiple Questions and Answers.
| 42. | In paints, the pigment is responsible for | ||
| A. | durability | ||
| B. | colour | ||
| C. | smoothness | ||
| D. | glassy face | ||
| 43. | The operation of removal of impurities or clay adhering to iron ores, is known as | ||
| A. | dressing | ||
| B. | calcination | ||
| C. | roasting | ||
| D. | smelting. | ||
| 44. | If water required for 1 bag of cement is 30 litres, the water cement ratio is : | ||
| A. | 0.4 | ||
| B. | 0.5 | ||
| C. | 0.6 | ||
| D. | None of these. | ||
| 45. | Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as | ||
| A. | quick setting cement | ||
| B. | rapid hardening cement | ||
| C. | white cement | ||
| D. | low heat Portland cement. | ||
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