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Refractory Technology

Refractory Technology
Dolomite bricks have good resistance to attack by

Lime slag
Iron oxide
None of these
Molten steel

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Refractory Technology
Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively.

50 and 50
60 and 40
80 and 20
20 and 80

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Refractory Technology
Panel test determines the __________ of refractories.

Spalling resistance
Slag penetration resistance
Refractoriness under load (RUL)
Fusion point

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Refractory Technology
High alumina refractories are used in the

Electric arc furnace roof
All of these
Glass melting furnaces
Dome of blast furnace stoves

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Refractory Technology
Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale.

Lowduty fireclay
Silica
Chrome or magnesite
Silicon carbide

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Refractory Technology
Fusion point of an acidic refractory material is

Not affected by the addition of basic oxides
Not affected by the addition of basic oxides
Reduced by the addition of basic oxides
Increased by the addition of basic oxides

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