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Refractory Technology

Refractory Technology
Outer combustion chamber of blast furnace stove is lined with __________ bricks.

Fireclay
Zirconia
Chrome magnesite
Silica

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Refractory Technology
Chromite refractories are used in

Both A & B
Neither A nor B
Bottom of soaking pits
Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other

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Refractory Technology
Carbon refractories are exclusively used in the

Side wall of soaking pits
Regenerators of coke oven
Walls of coke oven
Hearth of blast furnace

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Refractory Technology
Which of the following does not occur during firing/burning of refractories?

Removal of water of hydration
Decrease in crushing strength
Vitrification
Development of stable mineral form

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Refractory Technology
Silica bricks are never used for lining the

Beehive coke ovens
Dome of blast furnace stoves
By-product coke ovens
Roof of open hearth furnace

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Refractory Technology
Insulating refractories should have

Neither A nor B
Low thermal conductivity
Both A & B
High porosity

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