Refractory Technology Maximum safe working temperature for fireclay bricks is about __________ °C. 1300 1150 1450 1550 1300 1150 1450 1550 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chemically, mullite refractories is ThO₂ ZrSO₄ Al2O₃ 3Al2O₃.2SiO₂ ThO₂ ZrSO₄ Al2O₃ 3Al2O₃.2SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories Do not burn/oxidise, when exposed to air on heating Are not attacked by slags, as they are not wetted by melts Have extremely low thermal & electrical conductivities Do not resist temperature fluctuations Do not burn/oxidise, when exposed to air on heating Are not attacked by slags, as they are not wetted by melts Have extremely low thermal & electrical conductivities Do not resist temperature fluctuations ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractory blocks Are acidic in nature Are wetted by molten iron All of these Are used in the hearth of blast furnace Are acidic in nature Are wetted by molten iron All of these Are used in the hearth of blast furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Conversion of silica mineral to cristobalite is accompanied by reduction in its Volume Neither A nor B Specific gravity Both A & B Volume Neither A nor B Specific gravity Both A & B ANSWER DOWNLOAD EXAMIANS APP
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