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Building Materials - Section 5 Multiple Questions and Answers.
| 16. | For sanitary pipes and chemical stonewares, | ||
| A. | salt glazing is used | ||
| B. | lead glazing is used | ||
| C. | opaque glazing is used | ||
| D. | None of these. | ||
| 17. | The steel used for rails under heavy traffic and on sharp curves, is | ||
| A. | Nickel steel | ||
| B. | Chrome steel | ||
| C. | Magnese steel | ||
| D. | Vanadium steel. | ||
| 18. | The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick | ||
| A. | 20% | ||
| B. | 15% | ||
| C. | 10% | ||
| D. | None of these. | ||
| 19. | Snowcrete is one of the patent forms of | ||
| A. | distempers | ||
| B. | water proof cement paints | ||
| C. | enamel paints | ||
| D. | cellulose paints. | ||
| 20. | The usual percentages of clay and metal in cermet are : | ||
| A. | 50%, 50% | ||
| B. | 60%, 40% | ||
| C. | 70%, 30% | ||
| D. | 80%, 20%. | ||
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