Refractory Technology Refractoriness/fusion points of 'superduty' refractories is __________ °C. > 1730 1630-1670 1520-1630 > 2000 > 1730 1630-1670 1520-1630 > 2000 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories are generally not used in the Steel melting furnace Burning zone of cement kilns Electric furnace walls Open hearth furnace Steel melting furnace Burning zone of cement kilns Electric furnace walls Open hearth furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not an alumino-silicate refractory? Fireclay bricks Mullite bricks High alumina bricks Tar dolomite bricks Fireclay bricks Mullite bricks High alumina bricks Tar dolomite bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the alumina content, the refractoriness of high alumina refractories Decreases Remains same Increases May increase or decrease Decreases Remains same Increases May increase or decrease ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome refractories Have better spalling resistance than chrome magnesite 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 Are not at all resistant to the corrosive action of iron oxide Have better spalling resistance than chrome magnesite 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 Are not at all resistant to the corrosive action of iron oxide ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Periclase is MgCO₃ Amorphous magnesite Crystalline form of MgO ZrSO₄ MgCO₃ Amorphous magnesite Crystalline form of MgO ZrSO₄ ANSWER DOWNLOAD EXAMIANS APP
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