Refractory Technology Natural silica All of these Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Is not stable at high temperature Mainly contains quartz All of these Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Is not stable at high temperature Mainly contains quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a high alumina refractory? Dolomite Corrundum Mullite Bauxite Dolomite Corrundum Mullite Bauxite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica below 870°C ? Cristobalite None of these Tridymite Quartz Cristobalite None of these Tridymite Quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant? Soaking pits Ceheating furnace Rotary lime kiln L.D. converter Soaking pits Ceheating furnace Rotary lime kiln L.D. converter ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome refractories Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have better spalling resistance than chrome magnesite refractories Have very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have better spalling resistance than chrome magnesite refractories Have very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks are used in the Chimney linings All of these Furnaces allowed to cool frequently Flues Chimney linings All of these Furnaces allowed to cool frequently Flues ANSWER DOWNLOAD EXAMIANS APP
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