Refractory Technology High porosity refractory bricks have Poor heat conductivity & low strength Poor resistance to the peneration of molten slag, metal & flue gases Better thermal spalling resistance All of these Poor heat conductivity & low strength Poor resistance to the peneration of molten slag, metal & flue gases Better thermal spalling resistance All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome bricks are used in the Reheating furnaces Soaking pits All of these Roof lining of basic open hearth & other basic furnaces Reheating furnaces Soaking pits All of these Roof lining of basic open hearth & other basic furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology The largest consumer of refractories is the __________ industry. Fertiliser Metallurgical Cement Power Fertiliser Metallurgical Cement Power ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Natural silica Mainly contains quartz Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Is not stable at high temperature All of these Mainly contains quartz Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Is not stable at high temperature All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum water percentage in refractory mix meant for hand moulding may be as high as __________ percent. 7-12 5-7 2-3 14-20 7-12 5-7 2-3 14-20 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome refractories Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have better spalling resistance than chrome magnesite refractories Have very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have better spalling resistance than chrome magnesite refractories Have very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide ANSWER DOWNLOAD EXAMIANS APP
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