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 An ideal refractory should have high Spalling rate None of these Fusion point Shrinkage ability Spalling rate None of these Fusion point Shrinkage ability ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Graphite or carbon refractories Should be used in neutral or reducing atmosphere Exihibit wetting characteristics Are not resistant to corrosion by slag Exhibit high shrinkage on thermal treatment Should be used in neutral or reducing atmosphere Exihibit wetting characteristics Are not resistant to corrosion by slag Exhibit high shrinkage on thermal treatment ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology To resist spalling tendency, a refractory should have Greater diffusivity All of these Low specific heat Low thermal co-efficient of expansion Greater diffusivity All of these Low specific heat Low thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is a neutral refractory? Graphite Magnesia Magnesite chrome Silica Graphite Magnesia Magnesite chrome Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With decrease in porosity, the __________ of the refractories decreases. None of these Spalling resistance Thermal conductivity Strength None of these Spalling resistance Thermal conductivity Strength ANSWER DOWNLOAD EXAMIANS APP
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