Refractory Technology Which of the following does not occur during firing/burning of refractories? Decrease in crushing strength Removal of water of hydration Development of stable mineral form Vitrification Decrease in crushing strength Removal of water of hydration Development of stable mineral form Vitrification ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves? High strength and density All of these High refractoriness High resistance to spalling High strength and density All of these High refractoriness High resistance to spalling ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum water percentage in refractory mix meant for hand moulding may be as high as __________ percent. 2-3 14-20 7-12 5-7 2-3 14-20 7-12 5-7 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity). Fireclay Carborundum Chromite Graphite Fireclay Carborundum Chromite Graphite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica upto 1470°C ? Quartz Cristobalite Tridymite None of these Quartz Cristobalite Tridymite None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite refractories are generally not used in the Burning zone of cement kilns Open hearth furnace Electric furnace walls Steel melting furnace Burning zone of cement kilns Open hearth furnace Electric furnace walls Steel melting furnace ANSWER DOWNLOAD EXAMIANS APP
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