Refractory Technology Which is the stable form of silica upto 1470°C ? None of these Tridymite Cristobalite Quartz None of these Tridymite Cristobalite Quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C. 1380 1520 1710 1915 1380 1520 1710 1915 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory bricks with lower permeability is produced by using Finer grog size Higher moulding pressure Higher firing temperature All of these Finer grog size Higher moulding pressure Higher firing temperature All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Reduced by the addition of acid oxides Always less than 1000°C Increased by the addition of acid oxides Not affected by the addition of acid oxides Reduced by the addition of acid oxides Always less than 1000°C Increased by the addition of acid oxides Not affected by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology SiO₂ percentage in firebrick is about >94 35-40 55-60 80-85 >94 35-40 55-60 80-85 ANSWER DOWNLOAD EXAMIANS APP
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
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