Refractory Technology Magnesite bricks have poor resistance to attack by __________ slag. Acid Basic Lime None of these Acid Basic Lime None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum safe working temperature for fireclay bricks is about __________ °C. 1550 1150 1300 1450 1550 1150 1300 1450 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Natural silica Is not stable at high temperature Mainly contains quartz All of these Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Is not stable at high temperature Mainly contains quartz All of these Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Graphite or carbon refractories Exhibit high shrinkage on thermal treatment Exihibit wetting characteristics Should be used in neutral or reducing atmosphere Are not resistant to corrosion by slag Exhibit high shrinkage on thermal treatment Exihibit wetting characteristics Should be used in neutral or reducing atmosphere Are not resistant to corrosion by slag ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Semi-silica bricks compared to silica bricks have Better spalling resistance Both A & B Less fusion point Neither A nor B Better spalling resistance Both A & B Less fusion point Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Machine moulding of dry mixture of refractories requires a pressure of the order of __________ kg/cm². 10 1000 100 500 10 1000 100 500 ANSWER DOWNLOAD EXAMIANS APP
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