Refractory Technology With increasing alumina content, the fusion point of high alumina refractories Increases May increase or decrease ; depends on its alumina content Remains constant Decreases Increases May increase or decrease ; depends on its alumina content Remains constant Decreases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not an acidic refractory? Bauxite bricks Fireclay bricks Silica bricks Magnesia bricks Bauxite bricks Fireclay bricks Silica bricks Magnesia bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories are generally not used in the Open hearth furnace Steel melting furnace Burning zone of cement kilns Electric furnace walls Open hearth furnace Steel melting furnace Burning zone of cement kilns Electric furnace walls ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal spalling mainly occurs during __________ of furnaces. Cooling down Neither A nor B Warming up Both A & B Cooling down Neither A nor B Warming up Both A & B 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? Chemically prepared foam Saw dust Sand Cork Chemically prepared foam Saw dust Sand Cork ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Firing of refractory brick is done to Form ceramic bonds necessary for development of high crushing strength in the finished product All of these Dehydrate the dried refractory Develop stable mineral forms in them Form ceramic bonds necessary for development of high crushing strength in the finished product All of these Dehydrate the dried refractory Develop stable mineral forms in them ANSWER DOWNLOAD EXAMIANS APP
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