Refractory Technology High density refractory bricks have lower Spalling resistance Fusion point Thermal conductivity Slag penetration resistance Spalling resistance Fusion point Thermal conductivity Slag penetration resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories have Low co-efficient of thermal expansion Very high cost Tendency to expand unduly high during firing Poor thermal spalling resistance Low co-efficient of thermal expansion Very high cost Tendency to expand unduly high during firing Poor thermal spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively. 60 and 40 50 and 50 20 and 80 80 and 20 60 and 40 50 and 50 20 and 80 80 and 20 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Machine moulding of dry mixture of refractories requires a pressure of the order of __________ kg/cm². 500 100 10 1000 500 100 10 1000 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology 'Super refractories' are made from pure Borides Carbides Nitrides Oxides Borides Carbides Nitrides Oxides ANSWER DOWNLOAD EXAMIANS APP
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 Insulation of high temperature furnaces Nuclear reactors, missiles & space crafts Hearth of the blast furnace Roof of electric furnaces Insulation of high temperature furnaces Nuclear reactors, missiles & space crafts Hearth of the blast furnace Roof of electric furnaces ANSWER DOWNLOAD EXAMIANS APP
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