Refractory Technology Refractoriness/fusion points of 'superduty' refractories is __________ °C. 1520-1630 > 1730 1630-1670 > 2000 1520-1630 > 1730 1630-1670 > 2000 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness under load (RUL) is the most important property for the refractory bricks Used for furnace insulation Used in the roof of the furnace None of these At the hearth bottom of the furnace on which stock is placed Used for furnace insulation Used in the roof of the furnace None of these At the hearth bottom of the furnace on which stock is placed ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture? Saw dust Cork Chemically prepared foam Sand Saw dust Cork Chemically prepared foam Sand ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chemically, mullite refractories is Al2O₃ 3Al2O₃.2SiO₂ ZrSO₄ ThO₂ Al2O₃ 3Al2O₃.2SiO₂ ZrSO₄ ThO₂ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chrome magnesite bricks are Acidic in nature Made by mixing 30% chromite and 70% periclase Neutral in nature Having higher RUL than silica bricks Acidic in nature Made by mixing 30% chromite and 70% periclase Neutral in nature Having higher RUL than silica bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity is induced in insulating refractories by adding All of these Calcium phosphate Ammonium chloride/sulphate Powdered naphthalene All of these Calcium phosphate Ammonium chloride/sulphate Powdered naphthalene ANSWER DOWNLOAD EXAMIANS APP