Refractory Technology Thermal conductivity of refractory bricks Increases with the amount of air entrapped in pores Decreases with decreases in porosity Is independent of its porosity and is maximum for insulating bricks Increases with decrease in porosity Increases with the amount of air entrapped in pores Decreases with decreases in porosity Is independent of its porosity and is maximum for insulating bricks Increases with decrease in porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pure oxide refractories are generally monocrystaliine in nature and are self bonded __________ bricks are generally used as moderator in nuclear reactors. Corundum Thoria Carborundum Beryllia Corundum Thoria Carborundum Beryllia ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material? Plaster of paris Aluminium phosphate Water Lime Plaster of paris Aluminium phosphate Water Lime ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories have Poor thermal spalling resistance Low co-efficient of thermal expansion Tendency to expand unduly high during firing Very high cost Poor thermal spalling resistance Low co-efficient of thermal expansion Tendency to expand unduly high during firing Very high cost ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant? Rotary lime kiln Soaking pits L.D. converter Ceheating furnace Rotary lime kiln Soaking pits L.D. converter Ceheating furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Tar bonded dolomite bricks All of these Have poorer hydration resistance than pitch bonded bricks Are stored under controlled temperature & humidity to avoid hydration Are used in outer lining of L.D. converters All of these Have poorer hydration resistance than pitch bonded bricks Are stored under controlled temperature & humidity to avoid hydration Are used in outer lining of L.D. converters ANSWER DOWNLOAD EXAMIANS APP
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