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Refractory Technology

Refractory Technology
'Super refractories' are made from pure

Nitrides
Carbides
Oxides
Borides

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Refractory Technology
Grog addition in fireclay during brick manufacture is done to

Enhance the strength of fired refractories
Impart greater spalling resistance
Reduce its shrinkage on heating
All of these

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Refractory Technology
Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage?

Magnesite bricks
Fireclay bricks
Mullite bricks
Tar bonded dolomite bricks

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Refractory Technology
Panel test determines the __________ of refractories.

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

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Refractory Technology
Porosity of fireclay refractories is __________ percent.

43961
44129
35-50
25-35

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Refractory Technology
Chrome magnesite brick is not used for lining the

Bottom hearth of reheating furnace
Hearth of soaking pits
Coke oven regenerator
Burning zone of limestone rotary kilns

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MORE MCQ ON Refractory Technology

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