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Refractory Technology

Refractory Technology
Which is an acidic refractory?

Chrome magnesite
Fireclay
Magnesite
Dolomite

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Refractory Technology
Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C.

770
270
570
70

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Refractory Technology
'Spinel', a refractory mineral is chemically represented as

MgAl2O₄
MgAl2O₃.2H₂O
MgAl2O₃
MgSO₄

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Refractory Technology
Refractories used in/for __________ should have low thermal conductivity.

Muffle furnaces
Insulation
Coke ovens
Regenerators

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Refractory Technology
'Super refractories' are made from pure

Borides
Oxides
Nitrides
Carbides

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Refractory Technology
Vacuum steel degassing units are lined with

Low duty firebricks
Graphite blocks
Silica bricks
High alumina bricks

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