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Refractory Technology

Refractory Technology
__________ bricks should not be used in oxidising atmosphere.

Silica
Tar dolomite
Fireclay
Carbon

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Refractory Technology
Silicon carbide refractories are used in the

All of these
Zinc smelting furnace
Muffle furnace
Ceramic recuperators

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Refractory Technology
Fusion temperature of pure silica (SiO₂) is __________ °C.

2570
1715
2800
1350

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Refractory Technology
Bottom of basic open hearth furnace are constructed of

Porous fireclay bricks
Semi-silica bricks
Silicon carbide bricks
Dead burnt magnesite ramming mass

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

Mullite bricks
Fireclay bricks
Tar bonded dolomite bricks
Magnesite bricks

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Refractory Technology
Porosity is induced in insulating refractories by adding

Ammonium chloride/sulphate
Calcium phosphate
All of these
Powdered naphthalene

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MORE MCQ ON Refractory Technology

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