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Refractory Technology

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

Tar dolomite
Fireclay
Silica
Carbon

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Refractory Technology
Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material?

Plaster of paris
Lime
Water
Aluminium phosphate

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Refractory Technology
Carbon refractories are exclusively used in the

Side wall of soaking pits
Regenerators of coke oven
Hearth of blast furnace
Walls of coke oven

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Refractory Technology
Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.

All of these
Preheating
Cooling
Burning

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Refractory Technology
The linear thermal expansion of __________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent.

Corundum
Fireclay
Magnesite
Silica

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

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

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