Refractory Technology Mullite is chemically represented by Al2O₃ . SiO₂ 2Al2O₃ . 3SiO₂ Al2O₃ . 2SiO₂ 3Al2O₃ . 2SiO₂ Al2O₃ . SiO₂ 2Al2O₃ . 3SiO₂ Al2O₃ . 2SiO₂ 3Al2O₃ . 2SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Test piece for determination of RUL of a refractory is heated in a/an Electric furnace Reducing atmosphere Oxidising atmosphere Neutral atmosphere Electric furnace Reducing atmosphere Oxidising atmosphere Neutral atmosphere ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology The maximum linear expansion of silica bricks during firing is about __________ percent. 2 3.5 0.5 1 2 3.5 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively. 50 and 50 20 and 80 80 and 20 60 and 40 50 and 50 20 and 80 80 and 20 60 and 40 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the density of silica refractories, its Both A & B Spalling resistance reduces Resistance to slag attack increases Neither A nor B Both A & B Spalling resistance reduces Resistance to slag attack increases Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology To resist spalling tendency, a refractory should have Low thermal co-efficient of expansion Low specific heat Greater diffusivity All of these Low thermal co-efficient of expansion Low specific heat Greater diffusivity All of these ANSWER DOWNLOAD EXAMIANS APP
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