Refractory Technology Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of Crucibles used for melting of high purity metals Segar cones Muffles for muffle furnaces Insulating bricks Crucibles used for melting of high purity metals Segar cones Muffles for muffle furnaces Insulating bricks 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? Aluminium phosphate Water Plaster of paris Lime Aluminium phosphate Water Plaster of paris Lime ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Tar dolomite bricks are used in the Basic open hearth furnace Electric furnaces All of these Basic Bessemer converter Basic open hearth furnace Electric furnaces All of these Basic Bessemer converter ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology To resist spalling tendency, a refractory should have Low specific heat All of these Low thermal co-efficient of expansion Greater diffusivity Low specific heat All of these Low thermal co-efficient of expansion Greater diffusivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractory Does not react with basic slags Can not be used as an insulator Has poor electrical conductivity at high temperature Is produced from baddeleyite Does not react with basic slags Can not be used as an insulator Has poor electrical conductivity at high temperature Is produced from baddeleyite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Machine moulding of dry mixture of refractories requires a pressure of the order of __________ kg/cm². 10 100 1000 500 10 100 1000 500 ANSWER DOWNLOAD EXAMIANS APP
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