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Refractory Technology

Refractory Technology
Thermal diffusivity of a refractory brick is high, when its __________ is high.

Thermal conductivity
Density
Specific heat
None of these

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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

Hearth of the blast furnace
Nuclear reactors, missiles & space crafts
Insulation of high temperature furnaces
Roof of electric furnaces

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Refractory Technology
Dolomite bricks have good resistance to attack by

None of these
Molten steel
Lime slag
Iron oxide

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Refractory Technology
Magnesite refractories have low resistance to

Both B and C
Attack by basic slag
Abrasion
Disintegration on sudden change of temperature

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Refractory Technology
Refractories are dried in the

None of these
Rotary kilns
Sun
Tunnel kilns

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Refractory Technology
Which furnace consumes maximum refractory annually in an integrated steel plant?

L.D. converter
Soaking pit
Coke ovens
Blastfurnace

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