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? Sand Saw dust Cork Chemically prepared foam Sand Saw dust Cork Chemically prepared foam ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chromite refractories are Acidic refractory Neutral refractory Fired at a temperature of 600°C only Basic refractory Acidic refractory Neutral refractory Fired at a temperature of 600°C only Basic refractory ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica below 870°C ? Tridymite Quartz None of these Cristobalite Tridymite Quartz None of these Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following is not a high alumina refractory material? Periclase Diaspore Kyanite Sillimanite Periclase Diaspore Kyanite Sillimanite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of fireclay bricks is about __________ kgf/cm². 500-1000 200-400 100-150 50-100 500-1000 200-400 100-150 50-100 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Grog addition in fireclay during brick manufacture is done to Enhance the strength of fired refractories Reduce its shrinkage on heating Impart greater spalling resistance All of these Enhance the strength of fired refractories Reduce its shrinkage on heating Impart greater spalling resistance All of these ANSWER DOWNLOAD EXAMIANS APP
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