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Refractory Technology

Refractory Technology
Highest melting (m.p = 3070°C) oxide refractory is

Zirconia
Magnesia
Thoria
Alumina

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Refractory Technology
Semi-silica bricks compared to silica bricks have

Neither A nor B
Both A & B
Better spalling resistance
Less fusion point

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Refractory Technology
Which is not a high alumina refractory?

Mullite
Corrundum
Dolomite
Bauxite

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Refractory Technology
Which is not a basic refractory?

Chrome magnesite
Magnesite
Dolomite
Silicon carbide

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

Silica
Fireclay
Carbon
Tar dolomite

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Refractory Technology
Which of the following bricks should not be used, if the furnace is to be used intermit-tantly?

Silica bricks
Firebricks
Silicon carbide bricks
Sillimanite

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