Refractory Technology Carbon refractories 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 Have extremely low thermal & electrical conductivities ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Periclase is Amorphous magnesite ZrSO₄ MgCO₃ Crystalline form of MgO Amorphous magnesite ZrSO₄ MgCO₃ Crystalline form of MgO ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology To resist spalling tendency, a refractory should have Low thermal co-efficient of expansion Greater diffusivity All of these Low specific heat Low thermal co-efficient of expansion Greater diffusivity All of these Low specific heat ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology The maximum linear expansion of silica bricks during firing is about __________ percent. 1 2 3.5 0.5 1 2 3.5 0.5 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite bricks are used in those parts of furnaces, which are None of these Subjected to temperature fluctuation Required to resist corrosive basic slag Subjected to high load None of these Subjected to temperature fluctuation Required to resist corrosive basic slag Subjected to high load ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not an acidic refractory? Fireclay High alumina refractory Carbon black Silica Fireclay High alumina refractory Carbon black Silica ANSWER DOWNLOAD EXAMIANS APP
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