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 10 to 30% magnesite is added to chromite to produce chrome-magnesite refractories. Magnesite addition is mainly done to improve the __________ of chromite. Spalling resistance Resistance to slag Refractoriness Crushing strength Spalling resistance Resistance to slag Refractoriness Crushing strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories Are not attacked by slags, as they are not wetted by melts Do not burn/oxidise, when exposed to air on heating Have extremely low thermal & electrical conductivities Do not resist temperature fluctuations Are not attacked by slags, as they are not wetted by melts Do not burn/oxidise, when exposed to air on heating Have extremely low thermal & electrical conductivities Do not resist temperature fluctuations ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increasing alumina content, the fusion point of high alumina refractories Increases Decreases Remains constant May increase or decrease ; depends on its alumina content Increases Decreases Remains constant May increase or decrease ; depends on its alumina content ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories are used for the construction of those furnaces, which are Both (b) and © Used for raising & maintaining high temperature Not subjected to fluctuation in temperature Not required to resist the corrosive action of basic slag Both (b) and © Used for raising & maintaining high temperature Not subjected to fluctuation in temperature Not required to resist the corrosive action of basic slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory castables are used for Patch work Producing monolithic linings All of these Minimising the number of joints in the structure Patch work Producing monolithic linings All of these Minimising the number of joints in the structure ANSWER DOWNLOAD EXAMIANS APP
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