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Refractory Technology

Refractory Technology
__________ is not a single oxiderefractory.

Zirconia
Magnesia
None of these
Silicon carbide

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Refractory Technology
Ferromagnetic ceramic material is not used in the

Transformers
Television sets
Magnetic switches
Thermal insulation

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

Alumina
Thoria
Beryllia
Zirconia

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Refractory Technology
Refractory castables are used for

Producing monolithic linings
Minimising the number of joints in the structure
All of these
Patch work

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Refractory Technology
Magnesite refractories are used for the construction of those furnaces, which are

Used for raising & maintaining high temperature
Both (b) and ©
Not required to resist the corrosive action of basic slag
Not subjected to fluctuation in temperature

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Refractory Technology
Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks.

Silica
Fireclay
Zirconia
Magnesite

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