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Refractory Technology

Refractory Technology
'Super refractories' are made from pure

Carbides
Borides
Oxides
Nitrides

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Refractory Technology
Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks.

Fireclay
Very low alumina
Dolomite
Silica

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Refractory Technology
Maximum safe working temperature for fireclay bricks is about __________ °C.

1150
1300
1450
1550

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Refractory Technology
Maximum apparent porosity of magnesite bricks is about __________ percent.

8
44
24
58

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Refractory Technology
Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves?

High refractoriness
High resistance to spalling
All of these
High strength and density

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Refractory Technology
RUL of refractories depends on the

Chemical composition
All of these
Physical structure
Presence of impurities like iron & alkali

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MORE MCQ ON Refractory Technology

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