Refractory Technology Thermal conductivity of refractory bricks Is independent of its porosity and is maximum for insulating bricks Decreases with decreases in porosity Increases with decrease in porosity Increases with the amount of air entrapped in pores Is independent of its porosity and is maximum for insulating bricks Decreases with decreases in porosity Increases with decrease in porosity Increases with the amount of air entrapped in pores ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks are never used in the Beehive oven Lead blast furnace Zinc roaster Coke oven walls Beehive oven Lead blast furnace Zinc roaster Coke oven walls ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant? Ceheating furnace Soaking pits L.D. converter Rotary lime kiln Ceheating furnace Soaking pits L.D. converter Rotary lime kiln ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following does not occur during firing/burning of refractories? Development of stable mineral form Removal of water of hydration Decrease in crushing strength Vitrification Development of stable mineral form Removal of water of hydration Decrease in crushing strength Vitrification ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory bricks having lower porosity have High insulating properties Low heat capacity Low thermal conductivity Greater strength High insulating properties Low heat capacity Low thermal conductivity Greater strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum safe working temperature for fireclay bricks is about __________ °C. 1450 1550 1300 1150 1450 1550 1300 1150 ANSWER DOWNLOAD EXAMIANS APP
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