MCQOPTIONS
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MCQOPTIONS
| 1. |
*/*_Magnesite chrome refractories? |
| A. | Have better spalling resistance than chrome magnesite refractories |
| B. | Have very low thermal co-efficient of expansion |
| C. | Are not at all resistant to the corrosive action of iron oxide |
| D. | Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form |
| Answer» B. Have very low thermal co-efficient of expansion | |