Refractory Technology Bottom of basic open hearth furnace are constructed of Silicon carbide bricks Semi-silica bricks Porous fireclay bricks Dead burnt magnesite ramming mass Silicon carbide bricks Semi-silica bricks Porous fireclay bricks Dead burnt magnesite ramming mass ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology 10 to 30% magnesite is added to chromite to produce chrome-magnesite refractories. Magnesite addition is mainly done to improve the __________ of chromite. Crushing strength Resistance to slag Spalling resistance Refractoriness Crushing strength Resistance to slag Spalling resistance Refractoriness ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 770 270 570 70 770 270 570 70 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot metal runner in blast furnace are lined with __________ bricks. Magnesite Fireclay Silica Carborundum Magnesite Fireclay Silica Carborundum ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ bricks should not be used in oxidising atmosphere. Carbon Fireclay Tar dolomite Silica Carbon Fireclay Tar dolomite Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the alumina content, the refractoriness of high alumina refractories Remains same Increases May increase or decrease Decreases Remains same Increases May increase or decrease Decreases ANSWER DOWNLOAD EXAMIANS APP
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