Refractory Technology Which brick undergoes maximum shrinkage on drying? Fireclay bricks Magnesite bricks Tar bonded dolomite bricks Chromite bricks Fireclay bricks Magnesite bricks Tar bonded dolomite bricks Chromite bricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of Insulating bricks Crucibles used for melting of high purity metals Segar cones Muffles for muffle furnaces Insulating bricks Crucibles used for melting of high purity metals Segar cones Muffles for muffle furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chromite refractories are used in Neither A nor B Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other Bottom of soaking pits Both A & B Neither A nor B Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other Bottom of soaking pits Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome refractories Have very low thermal co-efficient of expansion Have better spalling resistance than chrome magnesite refractories 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 very low thermal co-efficient of expansion Have better spalling resistance than chrome magnesite refractories 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 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Graphite or carbon refractories Exihibit wetting characteristics Should be used in neutral or reducing atmosphere Exhibit high shrinkage on thermal treatment Are not resistant to corrosion by slag Exihibit wetting characteristics Should be used in neutral or reducing atmosphere Exhibit high shrinkage on thermal treatment Are not resistant to corrosion by slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which form of silica has the highest specific gravity? Tridymite All of these Quartz Cristobalite Tridymite All of these Quartz Cristobalite ANSWER DOWNLOAD EXAMIANS APP
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