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Refractory Technology

Refractory Technology
Which is not an alumino-silicate refractory?

Tar dolomite bricks
Mullite bricks
Fireclay bricks
High alumina bricks

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Refractory Technology
Hot metal runner in blast furnace are lined with __________ bricks.

Silica
Fireclay
Carborundum
Magnesite

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Refractory Technology
Which of the following does not occur during firing/burning of refractories?

Development of stable mineral form
Removal of water of hydration
Decrease in crushing strength
Vitrification

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Refractory Technology
Silicon carbide refractories are used in the

Ceramic recuperators
Zinc smelting furnace
All of these
Muffle furnace

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Refractory Technology
The highest melting pure oxide (m.p. > 3000°C) is

Alumina
Zirconia
Beryllia
Thoria

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Refractory Technology
Ferromagnetic ceramic material is not used in the

Thermal insulation
Television sets
Magnetic switches
Transformers

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