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Refractory Technology

Refractory Technology
Which is the stable form of silica between 1470°C and the melting point 1713°C ?

Tridymite
Quartz
None of these
Cristobalite

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Refractory Technology
Basic bricks are not made of

Chromite
Magnesite
Fireclay
Foresterite

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Refractory Technology
Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent.

80
90
70
55

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Refractory Technology
Tar dolomite bricks are used in the

Basic Bessemer converter
All of these
Basic open hearth furnace
Electric furnaces

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Refractory Technology
__________ nozzles are used in continuous casting of steel,

Zircon
Carborundum
Thoria
Beryllia

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

Mullite bricks
Tar bonded dolomite bricks
Fireclay bricks
Magnesite bricks

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