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Refractory Technology

Refractory Technology
Machine moulding of dry mixture of refractories requires a pressure of the order of __________ kg/cm².

10
500
1000
100

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Refractory Technology
Dolomite bricks have good resistance to attack by

Molten steel
Lime slag
Iron oxide
None of these

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Refractory Technology
Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the

Both A & B
Washing action of metal
Neither A nor B
Corrosion by layer of slag

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

Resistance to slag attack
Electrical conductivity
Spalling resistance
Softening temperature

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Refractory Technology
Which is not a high alumina refractory?

Dolomite
Corrundum
Mullite
Bauxite

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Refractory Technology
RUL of refractories depends on the

Chemical composition
All of these
Physical structure
Presence of impurities like iron & alkali

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