Refractory Technology Which is the stable form of silica below 870°C ? Quartz None of these Tridymite Cristobalite Quartz None of these Tridymite Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cermets are Having high strength & resistance to high temperature Composite material containing both ceramic & metallic constituents Used in space vehicles, missiles & nuclear energy plants All of these Having high strength & resistance to high temperature Composite material containing both ceramic & metallic constituents Used in space vehicles, missiles & nuclear energy plants All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks are never used for lining the Beehive coke ovens Dome of blast furnace stoves Roof of open hearth furnace By-product coke ovens Beehive coke ovens Dome of blast furnace stoves Roof of open hearth furnace By-product coke ovens ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not an acidic refractory? Silica High alumina refractory Fireclay Carbon black Silica High alumina refractory Fireclay Carbon black ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories Have extremely low thermal & electrical conductivities Do not burn/oxidise, when exposed to air on heating Are not attacked by slags, as they are not wetted by melts Do not resist temperature fluctuations Have extremely low thermal & electrical conductivities Do not burn/oxidise, when exposed to air on heating Are not attacked by slags, as they are not wetted by melts Do not resist temperature fluctuations ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Using a coarser grog during its manufacture Increasing its porosity Making it denser Decreasing its thermal co-efficient of expansion Using a coarser grog during its manufacture Increasing its porosity Making it denser Decreasing its thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
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