Refractory Technology Which is the most stable crystalline form of silica at room temperature? Tridymite Quartz Cristobalite None of these Tridymite Quartz Cristobalite None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An ideal refractory should have high Spalling rate Fusion point None of these Shrinkage ability Spalling rate Fusion point None of these Shrinkage ability ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot face insulating linings of high purity alumina fused mullite are used, where All of these Very high temperatures are involved Presence of iron or silica is harmful Highly reducing conditions are involved All of these Very high temperatures are involved Presence of iron or silica is harmful Highly reducing conditions are involved ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chrome magnesite is not used in the All of these Aluminium melting furnaces Wear out lining of steel melting furnaces Inner lining of L.D. converter All of these Aluminium melting furnaces Wear out lining of steel melting furnaces Inner lining of L.D. converter ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Colour of fireclay bricks is Black Light buff to reddish buff None of these Yellow Black Light buff to reddish buff None of these Yellow ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome refractories Are not at all resistant to the corrosive action of iron oxide Have better spalling resistance than chrome magnesite refractories Have very low thermal co-efficient of expansion Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Are not at all resistant to the corrosive action of iron oxide Have better spalling resistance than chrome magnesite refractories Have very low thermal co-efficient of expansion Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form ANSWER DOWNLOAD EXAMIANS APP
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