Refractory Technology Silica bricks have low spalling resistance below 600°C, due to its Very high thermal conductivity Low refractoriness High co-efficient of expansion upto this temperature High thermal diffusivity Very high thermal conductivity Low refractoriness High co-efficient of expansion upto this temperature High thermal diffusivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractories are not used in High frequency induction furnaces in the form of inductors Making sheaths for thermocouple Furnaces subjected to fluctuating temperature Lining high temperature ceramic kilns High frequency induction furnaces in the form of inductors Making sheaths for thermocouple Furnaces subjected to fluctuating temperature Lining high temperature ceramic kilns ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the density of silica refractories, its Both A & B Neither A nor B Resistance to slag attack increases Spalling resistance reduces Both A & B Neither A nor B Resistance to slag attack increases Spalling resistance reduces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica refractories All of these Have lower thermal conductivity than fireclay bricks Crack when subjected to sudden change of temperature Can not be used in the dome of hot blast stoves All of these Have lower thermal conductivity than fireclay bricks Crack when subjected to sudden change of temperature Can not be used in the dome of hot blast stoves ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Grog Is a non-plastic material Contains both alumina and silica All of these Iscrushed firebrick Is a non-plastic material Contains both alumina and silica All of these Iscrushed firebrick ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion temperature of pure silica (SiO₂) is __________ °C. 1715 2800 2570 1350 1715 2800 2570 1350 ANSWER DOWNLOAD EXAMIANS APP
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