Refractory Technology Zirconia refractories are not used in High frequency induction furnaces in the form of inductors Making sheaths for thermocouple Furnaces subjected to fluctuating temperature Lining high temperature ceramic kilns High frequency induction furnaces in the form of inductors Making sheaths for thermocouple Furnaces subjected to fluctuating temperature Lining high temperature ceramic kilns ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the Neither A nor B Washing action of metal Corrosion by layer of slag Both A & B Neither A nor B Washing action of metal Corrosion by layer of slag Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone. Preheating Burning Cooling All of these Preheating Burning Cooling All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent. 80 55 90 70 80 55 90 70 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories Do not resist temperature fluctuations Have extremely low thermal & electrical conductivities Are not attacked by slags, as they are not wetted by melts Do not burn/oxidise, when exposed to air on heating Do not resist temperature fluctuations Have extremely low thermal & electrical conductivities Are not attacked by slags, as they are not wetted by melts Do not burn/oxidise, when exposed to air on heating ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractory 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 Does not react with basic slags Is produced from baddeleyite ANSWER DOWNLOAD EXAMIANS APP
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