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 Which is the stable form of silica below 870°C ? None of these Tridymite Cristobalite Quartz None of these Tridymite Cristobalite Quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pyrometric cone equivalent (PCE) of a refractory is the measure of its Resistance to carbon monoxide attack Fusion point Resistance to slag penetration Spalling resistance Resistance to carbon monoxide attack Fusion point Resistance to slag penetration Spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chrome magnesite is not used in the Inner lining of L.D. converter Wear out lining of steel melting furnaces Aluminium melting furnaces All of these Inner lining of L.D. converter Wear out lining of steel melting furnaces Aluminium melting furnaces All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ bricks are used in the burning zone of a cement rotary kiln. Thoria Silicon carbide Fireclay High alumina Thoria Silicon carbide Fireclay High alumina ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, becaus of its High crushing strength Non-wetting characteristic High thermal conductivity None of these High crushing strength Non-wetting characteristic High thermal conductivity None of these ANSWER DOWNLOAD EXAMIANS APP
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