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Refractory Technology

Refractory Technology
Which of the following is not an acidic refractory?

Fireclay bricks
Magnesia bricks
Bauxite bricks
Silica bricks

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Refractory Technology
Silliminite (Al2O₃.SiO₂) refractory, which is a neutral refractory, is not used in

Gas retorts
Pottery furnace
Glass melting furnace
Crucibles

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Refractory Technology
Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material?

Plaster of paris
Water
Aluminium phosphate
Lime

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Refractory Technology
Panel test determines the __________ of refractories.

Fusion point
Spalling resistance
Refractoriness under load (RUL)
Slag penetration resistance

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Refractory Technology
Which of the following is not a neutral refractory?

Graphite
Silicon carbide
Chromite
Magnesite

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Refractory Technology
PCE value (Segar cone) of superduty refractories is more than 33, which is equivalent to a temperature of __________ °C.

1670
1730
1520
1630

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