Refractory Technology Porosity is induced in insulating refractories by adding All of these Ammonium chloride/sulphate Powdered naphthalene Calcium phosphate All of these Ammonium chloride/sulphate Powdered naphthalene Calcium phosphate ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following has the lowest electrical resistivity? Alumina Fireclay Zircon Graphite Alumina Fireclay Zircon Graphite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology 10 to 30% magnesite is added to chromite to produce chrome-magnesite refractories. Magnesite addition is mainly done to improve the __________ of chromite. Crushing strength Spalling resistance Resistance to slag Refractoriness Crushing strength Spalling resistance Resistance to slag Refractoriness ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling tendency of refractories is reduced by increasing its Strength Specific gravity Thermal conductivity Porosity Strength Specific gravity Thermal conductivity Porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite bricks are used in those parts of furnaces, which are Required to resist corrosive basic slag Subjected to high load Subjected to temperature fluctuation None of these Required to resist corrosive basic slag Subjected to high load Subjected to temperature fluctuation None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chemically, mullite refractories is Al2O₃ ThO₂ 3Al2O₃.2SiO₂ ZrSO₄ Al2O₃ ThO₂ 3Al2O₃.2SiO₂ ZrSO₄ ANSWER DOWNLOAD EXAMIANS APP
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