Refractory Technology The maximum linear expansion of silica bricks during firing is about __________ percent. 1 0.5 2 3.5 1 0.5 2 3.5 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 very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide Have better spalling resistance than chrome magnesite refractories Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide Have better spalling resistance than chrome magnesite refractories ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks. Zirconia Fireclay Magnesite Silica Zirconia Fireclay Magnesite Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology RUL of refractories depends on the All of these Physical structure Chemical composition Presence of impurities like iron & alkali All of these Physical structure Chemical composition Presence of impurities like iron & alkali ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Roof of a basic open hearth furnace is lined with __________ bricks. Fireclay Dolomite Silica Magnesite Fireclay Dolomite Silica Magnesite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories have Poor thermal spalling resistance Very high cost Low co-efficient of thermal expansion Tendency to expand unduly high during firing Poor thermal spalling resistance Very high cost Low co-efficient of thermal expansion Tendency to expand unduly high during firing ANSWER DOWNLOAD EXAMIANS APP
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