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Refractory Technology

Refractory Technology
Which is an acidic refractory?

Chrome magnesite
Fireclay
Magnesite
Dolomite

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

L.D. converter
Coke ovens
Blastfurnace
Soaking pit

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Refractory Technology
Which of the following bricks has the most close values of RUL and PCE?

Fireclay bricks
High alumina bricks
Silica bricks
Tar dolomite bricks

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Refractory Technology
Which one contains minimum percentage of SiO₂?

Aluminous firebrick
Sillimanite
Semi-silica
Firebrick

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Refractory Technology
Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to

CO attack
Slag attack
Thermal spalling
Fusion under load

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Refractory Technology
Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except

Electrical conductivity
Thermal conductivity
Cost
Fusion point

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