

MCQOPTIONS
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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. | |