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Refractory Technology

Refractory Technology
Which is a neutral refractory?

Magnesia
Magnesite chrome
Silica
Graphite

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Refractory Technology
Which one contains minimum percentage of SiO₂?

Semi-silica
Sillimanite
Aluminous firebrick
Firebrick

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Refractory Technology
Which one expands on heating?

Both A & B
Fireclay bricks
Silica bricks
Neither A nor B

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Refractory Technology
Spray test determines the __________ of refractories.

Resistance to CO attack
RUL
Resistance to slag penetration
Permanent linear change

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Refractory Technology
Maximum water percentage in refractory mix meant for hand moulding may be as high as __________ percent.

5-7
7-12
2-3
14-20

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Refractory Technology
Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale.

Silica
Lowduty fireclay
Silicon carbide
Chrome or magnesite

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