Refractory Technology The maximum linear expansion of silica bricks during firing is about __________ percent. 1 2 3.5 0.5 1 2 3.5 0.5 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ is not a single oxiderefractory. None of these Zirconia Silicon carbide Magnesia None of these Zirconia Silicon carbide Magnesia ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the density of silica refractories, its Neither A nor B Both A & B Spalling resistance reduces Resistance to slag attack increases Neither A nor B Both A & B Spalling resistance reduces Resistance to slag attack increases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology What is Thoria? All of these Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock Thoria Has high resistance to basic slags Which is expensive & radioactive, is used in crucibles for melting high purity metals All of these Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock Thoria Has high resistance to basic slags Which is expensive & radioactive, is used in crucibles for melting high purity metals ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pyrometric cone equivalent (PCE) value (Segar cone) of 'superduty refractories' is more than 33 which corresponds to a temperature of __________ °C. 1670 1630 1730 1520 1670 1630 1730 1520 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Insulating refractories should have Both A & B Neither A nor B High porosity Low thermal conductivity Both A & B Neither A nor B High porosity Low thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
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