Refractory Technology Fusion point of a basic refractory material is Not affected by the addition of acid oxides Reduced by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Reduced by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Increasing its porosity Decreasing its thermal co-efficient of expansion Using a coarser grog during its manufacture Making it denser Increasing its porosity Decreasing its thermal co-efficient of expansion Using a coarser grog during its manufacture Making it denser ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves? High refractoriness All of these High resistance to spalling High strength and density High refractoriness All of these High resistance to spalling High strength and density ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of grog in fireclay brick during its manufacture is advantageous, because it results in Less shrinkage in heating, decreased apparent porosity & increased specific gravity All of these High strength & thermal spalling resistance Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production Less shrinkage in heating, decreased apparent porosity & increased specific gravity All of these High strength & thermal spalling resistance Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractory blocks Are used in the hearth of blast furnace All of these Are wetted by molten iron Are acidic in nature Are used in the hearth of blast furnace All of these Are wetted by molten iron Are acidic in nature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the alumina content in firebricks, its fusion point (refractoriness) Decreases Remains unchanged Increases Decreases linearly Decreases Remains unchanged Increases Decreases linearly ANSWER DOWNLOAD EXAMIANS APP
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