Refractory Technology Which is the most stable crystalline form of silica at room temperature? Quartz Tridymite None of these Cristobalite Quartz Tridymite None of these Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity). Fireclay Graphite Chromite Carborundum Fireclay Graphite Chromite Carborundum ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hot metal runner in blast furnace are lined with __________ bricks. Carborundum Magnesite Fireclay Silica Carborundum Magnesite Fireclay Silica ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractory Can not be used as an insulator Is produced from baddeleyite Has poor electrical conductivity at high temperature Does not react with basic slags Can not be used as an insulator Is produced from baddeleyite Has poor electrical conductivity at high temperature Does not react with basic slags ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Natural silica Is not stable at high temperature Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Mainly contains quartz All of these Is not stable at high temperature Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Mainly contains quartz All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? Low porosity High thermal conductivity Both A & B Neither A nor B Low porosity High thermal conductivity Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS