Refractory Technology Which is not a high alumina refractory? Dolomite Bauxite Mullite Corrundum Dolomite Bauxite Mullite Corrundum ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal spalling mainly occurs during __________ of furnaces. Both A & B Cooling down Neither A nor B Warming up Both A & B Cooling down Neither A nor B Warming up ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories are used for the construction of those furnaces, which are Not required to resist the corrosive action of basic slag Used for raising & maintaining high temperature Not subjected to fluctuation in temperature Both (b) and © Not required to resist the corrosive action of basic slag Used for raising & maintaining high temperature Not subjected to fluctuation in temperature Both (b) and © ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours. 1000 700 2000 1600 1000 700 2000 1600 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome refractories Have very low thermal co-efficient of expansion 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 Are not at all resistant to the corrosive action of iron oxide Have very low thermal co-efficient of expansion 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 Are not at all resistant to the corrosive action of iron oxide ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High alumina refractory compared to fireclay bricks have Less load bearing capacity Low refractoriness High resistance to thermal shock and creep Less resistance to slag attack Less load bearing capacity Low refractoriness High resistance to thermal shock and creep Less resistance to slag attack ANSWER DOWNLOAD EXAMIANS APP
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