Refractory Technology Spalling of a refractory means its Resistance to chemical action of gases and molten fluxes Fracture due to uneven expansion at high temperature Resistancce to compressive loads Softening Resistance to chemical action of gases and molten fluxes Fracture due to uneven expansion at high temperature Resistancce to compressive loads Softening ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite bricks are used in those parts of furnaces, which are Required to resist corrosive basic slag Subjected to high load Subjected to temperature fluctuation None of these Required to resist corrosive basic slag Subjected to high load Subjected to temperature fluctuation None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories have low resistance to Abrasion Disintegration on sudden change of temperature Attack by basic slag Both B and C Abrasion Disintegration on sudden change of temperature Attack by basic slag Both B and C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Crystalline magnesia Zirconium sulphate Silicon carbide Silicon nitride Crystalline magnesia Zirconium sulphate Silicon carbide Silicon nitride ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Making it denser Decreasing its thermal co-efficient of expansion Using a coarser grog during its manufacture Increasing its porosity Making it denser Decreasing its thermal co-efficient of expansion Using a coarser grog during its manufacture Increasing its porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory bricks with lower permeability is produced by using Higher moulding pressure Higher firing temperature Finer grog size All of these Higher moulding pressure Higher firing temperature Finer grog size All of these ANSWER DOWNLOAD EXAMIANS APP
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