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Refractory Technology

Refractory Technology
Chemically, mullite refractories is

ZrSO₄
ThO₂
3Al2O₃.2SiO₂
Al2O₃

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Refractory Technology
Periclase refractory contains mainly

Al2O₃
SiO₂
MgO
CaO

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

Slag attack
Thermal spalling
Fusion under load
CO attack

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Refractory Technology
High alumina refractories are used in the

Electric arc furnace roof
All of these
Glass melting furnaces
Dome of blast furnace stoves

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Refractory Technology
Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm² ) is __________ °C.

>1350
500
>2000
1000

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

Silicon carbide
Graphite
Chromite
Magnesite

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