Refractory Technology Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity). Chromite Fireclay Graphite Carborundum Chromite Fireclay Graphite Carborundum ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Crushing strength of a refractory Decreases with rise in service temperature Decreases with increase in porosity Increases with rise in service temperature Is unaffected with change in service temperature Decreases with rise in service temperature Decreases with increase in porosity Increases with rise in service temperature Is unaffected with change in service temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite bricks are used in those parts of furnaces, which are Subjected to high load Subjected to temperature fluctuation None of these Required to resist corrosive basic slag Subjected to high load Subjected to temperature fluctuation None of these Required to resist corrosive basic slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours. 700 1000 2000 1600 700 1000 2000 1600 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns. 2400 1800 2200 2700 2400 1800 2200 2700 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chrome magnesite bricks are Neutral in nature Acidic in nature Made by mixing 30% chromite and 70% periclase Having higher RUL than silica bricks Neutral in nature Acidic in nature Made by mixing 30% chromite and 70% periclase Having higher RUL than silica bricks ANSWER DOWNLOAD EXAMIANS APP
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