Refractory Technology Conversion of silica mineral to cristobalite is accompanied by reduction in its Both A & B Volume Neither A nor B Specific gravity Both A & B Volume Neither A nor B Specific gravity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chrome magnesite brick is not used for lining the Burning zone of limestone rotary kilns Coke oven regenerator Bottom hearth of reheating furnace Hearth of soaking pits Burning zone of limestone rotary kilns Coke oven regenerator Bottom hearth of reheating furnace Hearth of soaking pits ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica refractories Have lower thermal conductivity than fireclay bricks All of these Can not be used in the dome of hot blast stoves Crack when subjected to sudden change of temperature Have lower thermal conductivity than fireclay bricks All of these Can not be used in the dome of hot blast stoves Crack when subjected to sudden change of temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ nozzles are used in continuous casting of steel, Thoria Beryllia Carborundum Zircon Thoria Beryllia Carborundum Zircon ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zircon refractories have High RUL (1600°C) and refractoriness (> 2000°C) Low co-efficient of expansion High spalling resistance All of these High RUL (1600°C) and refractoriness (> 2000°C) Low co-efficient of expansion High spalling resistance All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Reduced by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Increased by the addition of acid oxides Reduced by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Increased by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
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