Refractory Technology Magnesite refractories are generally not used in the Steel melting furnace Open hearth furnace Burning zone of cement kilns Electric furnace walls Steel melting furnace Open hearth furnace Burning zone of cement kilns Electric furnace walls ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the most stable crystalline form of silica at room temperature? Cristobalite Quartz Tridymite None of these Cristobalite Quartz Tridymite None 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 Porosity is induced in insulating refractories by adding All of these Calcium phosphate Powdered naphthalene Ammonium chloride/sulphate All of these Calcium phosphate Powdered naphthalene Ammonium chloride/sulphate ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High density refractory bricks have lower Fusion point Thermal conductivity Slag penetration resistance Spalling resistance Fusion point Thermal conductivity Slag penetration resistance Spalling resistance 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
EXAMIANS