Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Does not affect Increases Either A or B; depends on its quantity Lowers Does not affect Increases Either A or B; depends on its quantity Lowers ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Making it denser Increasing its porosity Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Making it denser Increasing its porosity Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories have low resistance to Both B and C 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 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Zirconium sulphate Silicon nitride Crystalline magnesia Silicon carbide Zirconium sulphate Silicon nitride Crystalline magnesia Silicon carbide ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which furnace consumes maximum refractory annually in an integrated steel plant? Coke ovens Blastfurnace L.D. converter Soaking pit Coke ovens Blastfurnace L.D. converter Soaking pit ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Periclase is Crystalline form of MgO ZrSO₄ MgCO₃ Amorphous magnesite Crystalline form of MgO ZrSO₄ MgCO₃ Amorphous magnesite ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS