Refractory Technology Magnesite chrome refractories Have better spalling resistance than chrome magnesite refractories Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide Have better spalling resistance than chrome magnesite refractories Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite bricks are used in those parts of furnaces, which are Subjected to high load 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 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness under load (RUL) is the most important property for the refractory bricks At the hearth bottom of the furnace on which stock is placed Used for furnace insulation None of these Used in the roof of the furnace At the hearth bottom of the furnace on which stock is placed Used for furnace insulation None of these Used in the roof of the furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following does not occur during firing/burning of refractories? Development of stable mineral form Vitrification Removal of water of hydration Decrease in crushing strength Development of stable mineral form Vitrification Removal of water of hydration Decrease in crushing strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Colour of fireclay bricks is Black Light buff to reddish buff Yellow None of these Black Light buff to reddish buff Yellow None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks. Zirconia Fireclay Magnesite Silica Zirconia Fireclay Magnesite Silica ANSWER DOWNLOAD EXAMIANS APP
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