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.


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