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Refractory Technology

Refractory Technology
PCE value (Segar cone) of superduty refractories is more than 33, which is equivalent to a temperature of __________ °C.

1520
1630
1730
1670

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Refractory Technology
__________ bricks should not be used in oxidising atmosphere.

Fireclay
Silica
Tar dolomite
Carbon

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Refractory Technology
High porosity refractory bricks have

All of these
Poor heat conductivity & low strength
Poor resistance to the peneration of molten slag, metal & flue gases
Better thermal spalling resistance

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Refractory Technology
Tar dolomite bricks are used in the

All of these
Basic Bessemer converter
Electric furnaces
Basic open hearth furnace

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Refractory Technology
Magnesite chrome bricks are used in the

Soaking pits
Reheating furnaces
All of these
Roof lining of basic open hearth & other basic furnaces

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Refractory Technology
Grog addition in fireclay during brick manufacture is done to

Reduce its shrinkage on heating
Impart greater spalling resistance
Enhance the strength of fired refractories
All of these

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