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Refractory Technology

Refractory Technology
__________ nozzles are used in continuous casting of steel,

Beryllia
Zircon
Carborundum
Thoria

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Refractory Technology
Permeability of bricks is a measure of the

Melting point
Expansion during heating
Rate at which a fluid will pass through the pores
Refractoriness

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Refractory Technology
Electrical resistor bars are made of

Silicon carbide
Zirconia
Alumina
Graphite

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Refractory Technology
Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called

Refractoriness
Spalling resistance
None of these
Refractoriness under load (RUL)

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Refractory Technology
Refractory materials are never used in the construction of

Pressure vessels
Orton cones
Segar cones
Ovens & retorts

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Refractory Technology
Maximum safe working temperature for fireclay bricks is about __________ °C.

1450
1550
1300
1150

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