Refractory Technology Fireclay refractories have Tendency to expand unduly high during firing Low co-efficient of thermal expansion Very high cost Poor thermal spalling resistance Tendency to expand unduly high during firing Low co-efficient of thermal expansion Very high cost Poor thermal spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion temperature of pure silica (SiO₂) is __________ °C. 1715 2800 2570 1350 1715 2800 2570 1350 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractory Does not react with basic slags Is produced from baddeleyite Has poor electrical conductivity at high temperature Can not be used as an insulator Does not react with basic slags Is produced from baddeleyite Has poor electrical conductivity at high temperature Can not be used as an insulator ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a natural insulating material? Asbestos None of these Diatomaceous earth/kieselgur Vermiculite Asbestos None of these Diatomaceous earth/kieselgur Vermiculite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spray test determines the __________ of refractories. RUL Resistance to CO attack Resistance to slag penetration Permanent linear change RUL Resistance to CO attack Resistance to slag penetration Permanent linear change ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum safe working temperature for fireclay bricks is about __________ °C. 1300 1150 1550 1450 1300 1150 1550 1450 ANSWER DOWNLOAD EXAMIANS APP
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