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Refractory Technology

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

Carbon
Tar dolomite
Silica
Fireclay

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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
55
70

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Refractory Technology
Furnace atmosphere for softening temperature determination of refractories (in which segar cones are placed) should be

Neither A nor B
Neutral
Oxidising
Either A or B

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Refractory Technology
Segar cones are used for the determination of __________ of refractories.

Resistance to slag attack
Spalling resistance
Softening temperature
Electrical conductivity

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Refractory Technology
Bottom of basic open hearth furnace are constructed of

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

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Refractory Technology
Ferromagnetic ceramic material is not used in the

Thermal insulation
Transformers
Television sets
Magnetic switches

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