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Refractory Technology

Refractory Technology
Electrical resistor bars are made of

Zirconia
Alumina
Graphite
Silicon carbide

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Refractory Technology
Hollow refractory bricks are made by

Hand moulding
Extrusion
Slip casting
Pressing/machine moulding

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Refractory Technology
Spalling of a refractory means its

Softening
Fracture due to uneven expansion at high temperature
Resistance to chemical action of gases and molten fluxes
Resistancce to compressive loads

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Refractory Technology
Refractories are dried in the

Tunnel kilns
None of these
Rotary kilns
Sun

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Refractory Technology
Carbon bricks are not used in the lining of the

Combustion chamber of blast furnace stoves
Electric furnaces
Highly chemical resistant equipments
Blast furnace hearth

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Refractory Technology
Pure oxide refractories are generally monocrystaliine in nature and are self bonded __________ bricks are generally used as moderator in nuclear reactors.

Thoria
Carborundum
Beryllia
Corundum

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