Refractory Technology Thermal spalling mainly occurs during __________ of furnaces. Cooling down Warming up Neither A nor B Both A & B Cooling down Warming up Neither A nor B Both A & B 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. Thoria Corundum Carborundum Beryllia Thoria Corundum Carborundum Beryllia ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Quartz is All of these Stable form of silica upto 870°C Converted to tridymite on firing between 870 to 1470°C Transformed to crystoballite on heating above 1470°C All of these Stable form of silica upto 870°C Converted to tridymite on firing between 870 to 1470°C Transformed to crystoballite on heating above 1470°C ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Decreasing its thermal co-efficient of expansion Making it denser Increasing its porosity Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Making it denser Increasing its porosity Using a coarser grog during its manufacture ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractories are not used in Making sheaths for thermocouple Furnaces subjected to fluctuating temperature High frequency induction furnaces in the form of inductors Lining high temperature ceramic kilns Making sheaths for thermocouple Furnaces subjected to fluctuating temperature High frequency induction furnaces in the form of inductors Lining high temperature ceramic kilns ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks are never used in the Beehive oven Lead blast furnace Coke oven walls Zinc roaster Beehive oven Lead blast furnace Coke oven walls Zinc roaster ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS