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Refractory Technology

Refractory Technology
Which is a neutral refractory?

Silica
Magnesite chrome
Graphite
Magnesia

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Refractory Technology
Magnesite bricks are used in those parts of furnaces, which are

None of these
Subjected to high load
Required to resist corrosive basic slag
Subjected to temperature fluctuation

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Refractory Technology
Carbon refractories have very high

Refractoriness
Thermal conductivity
Wetting characteristics
Both B and C

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Refractory Technology
Which is not a basic refractory?

Silicon carbide
Chrome magnesite
Magnesite
Dolomite

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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

Fusion point
Electrical conductivity
Cost
Thermal conductivity

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Refractory Technology
Which of the following impurities reduces the refractoriness of magnesite bricks?

Al2O₃
All of these
SiO₂
CaO

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