Refractory Technology RUL of refractories depends on the Chemical composition Presence of impurities like iron & alkali All of these Physical structure Chemical composition Presence of impurities like iron & alkali All of these Physical structure ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dolomite bricks have good resistance to attack by Iron oxide None of these Lime slag Molten steel Iron oxide None of these Lime slag Molten steel ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold. High thermal conductivity Non-wetting characteristics High density Low porosity High thermal conductivity Non-wetting characteristics High density Low porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by 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 Making it denser Increasing its porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively. 60 and 40 20 and 80 50 and 50 80 and 20 60 and 40 20 and 80 50 and 50 80 and 20 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Graphite or carbon refractories Exhibit high shrinkage on thermal treatment Exihibit wetting characteristics Should be used in neutral or reducing atmosphere Are not resistant to corrosion by slag Exhibit high shrinkage on thermal treatment Exihibit wetting characteristics Should be used in neutral or reducing atmosphere Are not resistant to corrosion by slag ANSWER DOWNLOAD EXAMIANS APP
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