Refractory Technology Thermal diffusivity of a refractory brick is high, when its __________ is high. Thermal conductivity None of these Density Specific heat Thermal conductivity None of these Density Specific heat ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion temperature of pure silica (SiO₂) is __________ °C. 2570 1715 1350 2800 2570 1715 1350 2800 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Increases Either A or B; depends on its quantity Lowers Does not affect Increases Either A or B; depends on its quantity Lowers Does not affect ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Outer combustion chamber of blast furnace stove is lined with __________ bricks. Silica Fireclay Zirconia Chrome magnesite Silica Fireclay Zirconia Chrome magnesite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology SiO₂ percentage in firebrick is about 35-40 >94 80-85 55-60 35-40 >94 80-85 55-60 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to Thermal spalling CO attack Slag attack Fusion under load Thermal spalling CO attack Slag attack Fusion under load ANSWER DOWNLOAD EXAMIANS APP
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