Refractory Technology Mullite is chemically represented by 3Al2O₃ . 2SiO₂ Al2O₃ . SiO₂ Al2O₃ . 2SiO₂ 2Al2O₃ . 3SiO₂ 3Al2O₃ . 2SiO₂ Al2O₃ . SiO₂ Al2O₃ . 2SiO₂ 2Al2O₃ . 3SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the Both A & B Corrosion by layer of slag Washing action of metal Neither A nor B Both A & B Corrosion by layer of slag Washing action of metal Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Machine moulding of dry mixture of refractories requires a pressure of the order of __________ kg/cm². 10 500 1000 100 10 500 1000 100 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chromite refractories are used in Both A & B Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other Bottom of soaking pits Neither A nor B Both A & B Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other Bottom of soaking pits Neither A nor B 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 Silica refractories Crack when subjected to sudden change of temperature All of these Can not be used in the dome of hot blast stoves Have lower thermal conductivity than fireclay bricks Crack when subjected to sudden change of temperature All of these Can not be used in the dome of hot blast stoves Have lower thermal conductivity than fireclay bricks ANSWER DOWNLOAD EXAMIANS APP
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