Refractory Technology Carbon refractory blocks Are acidic in nature Are wetted by molten iron All of these Are used in the hearth of blast furnace Are acidic in nature Are wetted by molten iron All of these Are used in the hearth of blast furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Resistance to slag attack of a refractory Decreases at higher temperature Decreases, if defective joints & cracks exist in the refractory All of these Depends on the nature of slag & refractory Decreases at higher temperature Decreases, if defective joints & cracks exist in the refractory All of these Depends on the nature of slag & refractory ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With decrease in porosity, the __________ of the refractories decreases. Thermal conductivity Spalling resistance Strength None of these Thermal conductivity Spalling resistance Strength None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories have Tendency to expand unduly high during firing Low co-efficient of thermal expansion Poor thermal spalling resistance Very high cost Tendency to expand unduly high during firing Low co-efficient of thermal expansion Poor thermal spalling resistance Very high cost ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Basic bricks are not made of Chromite Fireclay Magnesite Foresterite Chromite Fireclay Magnesite Foresterite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories Have extremely low thermal & electrical conductivities Do not resist temperature fluctuations Do not burn/oxidise, when exposed to air on heating Are not attacked by slags, as they are not wetted by melts Have extremely low thermal & electrical conductivities Do not resist temperature fluctuations Do not burn/oxidise, when exposed to air on heating Are not attacked by slags, as they are not wetted by melts ANSWER DOWNLOAD EXAMIANS APP
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