MCQOPTIONS
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MCQOPTIONS
| 1. |
Percentage of silica in a good brick earth lies between_______________? |
| A. | 5 to 10% |
| B. | 20 to 30% |
| C. | 50 to 60% |
| D. | 70 to 80% |
| Answer» D. 70 to 80% | |