Refractory Technology Thermal conductivity of refractory bricks Is independent of its porosity and is maximum for insulating bricks Decreases with decreases in porosity Increases with the amount of air entrapped in pores Increases with decrease in porosity Is independent of its porosity and is maximum for insulating bricks Decreases with decreases in porosity Increases with the amount of air entrapped in pores Increases with decrease in porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Slide gates in teeming laddie used for steel pouring in ingot moulds is lined with __________ bricks. Silica Semi-silica Fireclay Bakelite impregnated or fused periclase Silica Semi-silica Fireclay Bakelite impregnated or fused periclase ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one expands on heating? Fireclay bricks Silica bricks Both A & B Neither A nor B Fireclay bricks Silica bricks Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not an acidic refractory? Silica Carbon black High alumina refractory Fireclay Silica Carbon black High alumina refractory Fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Panel test determines the __________ of refractories. Refractoriness under load (RUL) Spalling resistance Fusion point Slag penetration resistance Refractoriness under load (RUL) Spalling resistance Fusion point Slag penetration resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica between 1470°C and the melting point 1713°C ? Tridymite None of these Quartz Cristobalite Tridymite None of these Quartz Cristobalite ANSWER DOWNLOAD EXAMIANS APP
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