Refractory Technology Grog addition in fireclay during brick manufacture is done to Reduce its shrinkage on heating Impart greater spalling resistance All of these Enhance the strength of fired refractories Reduce its shrinkage on heating Impart greater spalling resistance All of these Enhance the strength of fired refractories ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the most stable crystalline form of silica at room temperature? Tridymite Cristobalite None of these Quartz Tridymite Cristobalite None of these Quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome refractories Have very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide Have better spalling resistance than chrome magnesite refractories Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide Have better spalling resistance than chrome magnesite refractories Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of refractories depends upon its Composition Texture All of these Firing temperature Composition Texture All of these Firing temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High alumina refractory compared to fireclay bricks have Less resistance to slag attack Low refractoriness High resistance to thermal shock and creep Less load bearing capacity Less resistance to slag attack Low refractoriness High resistance to thermal shock and creep Less load bearing capacity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High density refractory bricks have lower Slag penetration resistance Spalling resistance Fusion point Thermal conductivity Slag penetration resistance Spalling resistance Fusion point Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
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