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Refractory Technology

Refractory Technology
Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C.

1380
1710
1520
1915

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Refractory Technology
Which is not a high alumina refractory?

Corrundum
Mullite
Bauxite
Dolomite

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

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

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Refractory Technology
Which of the following bricks should not be used, if the furnace is to be used intermit-tantly?

Silicon carbide bricks
Firebricks
Silica bricks
Sillimanite

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Refractory Technology
Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively.

80 and 20
50 and 50
60 and 40
20 and 80

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Refractory Technology
Bauxite calcining rotary kilns are lined with __________ bricks.

85% alumina
Fireclay
Corundum
Carbon

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