Refractory Technology Refractory castables are used for Patch work All of these Producing monolithic linings Minimising the number of joints in the structure Patch work All of these Producing monolithic linings Minimising the number of joints in the structure ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage? Fireclay bricks Mullite bricks Magnesite bricks Tar bonded dolomite bricks Fireclay bricks Mullite bricks Magnesite bricks Tar bonded dolomite bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High porosity refractory bricks have Better thermal spalling resistance Poor resistance to the peneration of molten slag, metal & flue gases All of these Poor heat conductivity & low strength Better thermal spalling resistance Poor resistance to the peneration of molten slag, metal & flue gases All of these Poor heat conductivity & low strength ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology To resist spalling tendency, a refractory should have Greater diffusivity All of these Low thermal co-efficient of expansion Low specific heat Greater diffusivity All of these Low thermal co-efficient of expansion Low specific heat ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively. 60 and 40 50 and 50 20 and 80 80 and 20 60 and 40 50 and 50 20 and 80 80 and 20 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carborundum used for making crucibles for melting non-ferrous metals is chemically Silicon carbide Zirconium sulphate Crystalline magnesia Silicon nitride Silicon carbide Zirconium sulphate Crystalline magnesia Silicon nitride ANSWER DOWNLOAD EXAMIANS APP
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