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Refractory Technology

Refractory Technology
With increase in the alumina content in firebricks, its fusion point (refractoriness)

Decreases linearly
Increases
Decreases
Remains unchanged

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

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

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Refractory Technology
The main raw material for manufacture of silicon carbide refractories is

Carborundum
Bauxite
Corrundum
Periclase

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Refractory Technology
In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours.

700
1000
2000
1600

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Refractory Technology
Fireclay bricks is not used for lining the

Bottom of hot metal mixer
Roof of open hearth furnace
Gas producer
Cupola

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Refractory Technology
Refractory bricks having lower porosity have

High insulating properties
Low thermal conductivity
Greater strength
Low heat capacity

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