Refractory Technology Tar dolomite bricks are used in the Basic Bessemer converter Basic open hearth furnace Electric furnaces All of these Basic Bessemer converter Basic open hearth furnace Electric furnaces All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 270 70 770 570 270 70 770 570 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Zirconium sulphate Silicon nitride Silicon carbide Crystalline magnesia Zirconium sulphate Silicon nitride Silicon carbide Crystalline magnesia ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of a refractory means its Fracture due to uneven expansion at high temperature Resistance to chemical action of gases and molten fluxes Softening Resistancce to compressive loads Fracture due to uneven expansion at high temperature Resistance to chemical action of gases and molten fluxes Softening Resistancce to compressive loads ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following bricks has the most close values of RUL and PCE? Tar dolomite bricks Silica bricks High alumina bricks Fireclay bricks Tar dolomite bricks Silica bricks High alumina bricks Fireclay bricks 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
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