Refractory Technology Chemically, mullite refractories is ZrSO₄ ThO₂ 3Al2O₃.2SiO₂ Al2O₃ ZrSO₄ ThO₂ 3Al2O₃.2SiO₂ Al2O₃ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories Do not burn/oxidise, when exposed to air on heating Have extremely low thermal & electrical conductivities Do not resist temperature fluctuations Are not attacked by slags, as they are not wetted by melts Do not burn/oxidise, when exposed to air on heating Have extremely low thermal & electrical conductivities Do not resist temperature fluctuations Are not attacked by slags, as they are not wetted by melts ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology PCE value (Segar cone) of superduty refractories is more than 33, which is equivalent to a temperature of __________ °C. 1670 1630 1730 1520 1670 1630 1730 1520 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a basic refractory? Silicon carbide Magnesite Chrome magnesite Dolomite Silicon carbide Magnesite Chrome magnesite Dolomite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory bricks having lower porosity have Low heat capacity Low thermal conductivity Greater strength High insulating properties Low heat capacity Low thermal conductivity Greater strength High insulating properties ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal conductivity of refractory bricks Increases with decrease in porosity Decreases with decreases in porosity Is independent of its porosity and is maximum for insulating bricks Increases with the amount of air entrapped in pores Increases with decrease in porosity Decreases with decreases in porosity Is independent of its porosity and is maximum for insulating bricks Increases with the amount of air entrapped in pores ANSWER DOWNLOAD EXAMIANS APP
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