Refractory Technology Which is the stable form of silica upto 1470°C ? Tridymite Quartz None of these Cristobalite Tridymite Quartz None of these Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling tendency of refractories is reduced by increasing its Specific gravity Thermal conductivity Strength Porosity Specific gravity Thermal conductivity Strength Porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot face insulating linings of high purity alumina fused mullite are used, where Very high temperatures are involved All of these Highly reducing conditions are involved Presence of iron or silica is harmful Very high temperatures are involved All of these Highly reducing conditions are involved Presence of iron or silica is harmful ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Slide gates in teeming laddie used for steel pouring in ingot moulds is lined with __________ bricks. Bakelite impregnated or fused periclase Semi-silica Silica Fireclay Bakelite impregnated or fused periclase Semi-silica Silica Fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a basic refractory? Magnesite Silicon carbide Dolomite Chrome magnesite Magnesite Silicon carbide Dolomite Chrome magnesite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Does not affect Either A or B; depends on its quantity Lowers Increases Does not affect Either A or B; depends on its quantity Lowers Increases ANSWER DOWNLOAD EXAMIANS APP
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