Refractory Technology Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the Nuclear reactors, missiles & space crafts Roof of electric furnaces Insulation of high temperature furnaces Hearth of the blast furnace Nuclear reactors, missiles & space crafts Roof of electric furnaces Insulation of high temperature furnaces Hearth of the blast furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C. 1915 1380 1520 1710 1915 1380 1520 1710 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory materials are never used in the construction of Orton cones Ovens & retorts Pressure vessels Segar cones Orton cones Ovens & retorts Pressure vessels Segar cones ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chromite refractories are used in Both A & B Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other Neither A nor B Bottom of soaking pits Both A & B Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other Neither A nor B Bottom of soaking pits ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica upto 1470°C ? Tridymite None of these Quartz Cristobalite Tridymite None of these Quartz Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal conductivity of refractory bricks Increases with the amount of air entrapped in pores Increases with decrease in porosity Decreases with decreases in porosity Is independent of its porosity and is maximum for insulating bricks Increases with the amount of air entrapped in pores Increases with decrease in porosity Decreases with decreases in porosity Is independent of its porosity and is maximum for insulating bricks ANSWER DOWNLOAD EXAMIANS APP
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