Magnesite chrome refractories____________________?
Correct answer: A. Have better spalling resistance than chrome magnesite 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 cannot be used in metalcase
- E. form
Explanation
Magnesite-chrome refractories, with magnesia as the major constituent, generally offer better resistance to spalling than chrome-magnesite grades. The other statements incorrectly describe their strength, expansion, or chemical resistance.
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