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Refractory Technology

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

Chrome magnesite
Silica
Fireclay
Zirconia

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Refractory Technology
Which form of silica has the highest specific gravity?

Cristobalite
Tridymite
All of these
Quartz

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

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

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Refractory Technology
Grog

Is a non-plastic material
Contains both alumina and silica
Iscrushed firebrick
All of these

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Refractory Technology
Zirconia refractory

Has poor electrical conductivity at high temperature
Can not be used as an insulator
Is produced from baddeleyite
Does not react with basic slags

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Refractory Technology
Refractory materials are never used in the construction of

Pressure vessels
Orton cones
Segar cones
Ovens & retorts

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