Refractory Technology Fusion temperature of pure silica (SiO₂) is __________ °C. 1715 2800 1350 2570 1715 2800 1350 2570 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories have very high Both B and C Thermal conductivity Refractoriness Wetting characteristics Both B and C Thermal conductivity Refractoriness Wetting characteristics ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With decrease in porosity, the __________ of the refractories decreases. Thermal conductivity Spalling resistance None of these Strength Thermal conductivity Spalling resistance None of these Strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns. 2400 1800 2700 2200 2400 1800 2700 2200 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal spalling mainly occurs during __________ of furnaces. Neither A nor B Cooling down Both A & B Warming up Neither A nor B Cooling down Both A & B Warming up ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Periclase refractory contains mainly Al2O₃ MgO CaO SiO₂ Al2O₃ MgO CaO SiO₂ ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS