Refractory Technology Magnesite chrome refractories Are not at all resistant to the corrosive action of iron oxide Have very low thermal co-efficient of expansion 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 Are not at all resistant to the corrosive action of iron oxide Have very low thermal co-efficient of expansion 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 High alumina refractory compared to fireclay bricks have High resistance to thermal shock and creep Low refractoriness Less resistance to slag attack Less load bearing capacity High resistance to thermal shock and creep Low refractoriness Less resistance to slag attack Less load bearing capacity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of zircon to silica refractory brick improves its Neither A nor B Resistance to slag attack Crushing strength Neither A nor B Neither A nor B Resistance to slag attack Crushing strength Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Bottom of basic open hearth furnace are constructed of Semi-silica bricks Dead burnt magnesite ramming mass Porous fireclay bricks Silicon carbide bricks Semi-silica bricks Dead burnt magnesite ramming mass Porous fireclay bricks Silicon carbide bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks are used in the Chimney linings Furnaces allowed to cool frequently Flues All of these Chimney linings Furnaces allowed to cool frequently Flues All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Increasing its porosity Making it denser Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Increasing its porosity Making it denser ANSWER DOWNLOAD EXAMIANS APP
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