Refractory Technology Which of the following impurities reduces the refractoriness of magnesite bricks? SiO₂ All of these Al2O₃ CaO SiO₂ All of these Al2O₃ CaO ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one contains minimum percentage of SiO₂? Sillimanite Aluminous firebrick Firebrick Semi-silica Sillimanite Aluminous firebrick Firebrick Semi-silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon bricks are not used in the lining of the Blast furnace hearth Highly chemical resistant equipments Electric furnaces Combustion chamber of blast furnace stoves Blast furnace hearth Highly chemical resistant equipments Electric furnaces Combustion chamber of blast furnace stoves ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following has the lowest electrical resistivity? Zircon Fireclay Alumina Graphite Zircon Fireclay Alumina Graphite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Mullite is chemically represented by 2Al2O₃ . 3SiO₂ 3Al2O₃ . 2SiO₂ Al2O₃ . 2SiO₂ Al2O₃ . SiO₂ 2Al2O₃ . 3SiO₂ 3Al2O₃ . 2SiO₂ Al2O₃ . 2SiO₂ Al2O₃ . SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks have low spalling resistance below 600°C, due to its High co-efficient of expansion upto this temperature Very high thermal conductivity Low refractoriness High thermal diffusivity High co-efficient of expansion upto this temperature Very high thermal conductivity Low refractoriness High thermal diffusivity ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS