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Refractory Technology

Refractory Technology
Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm² ) is __________ °C.

1000
>2000
>1350
500

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Refractory Technology
Segar cones are used for the determination of __________ of refractories.

Softening temperature
Electrical conductivity
Resistance to slag attack
Spalling resistance

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

Preheating
All of these
Cooling
Burning

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Refractory Technology
Periclase refractory contains mainly

SiO₂
CaO
Al2O₃
MgO

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Refractory Technology
Addition of zircon to silica refractory brick improves its

Neither A nor B
Resistance to slag attack
Neither A nor B
Crushing strength

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Refractory Technology
Which is a neutral refractory?

Magnesite chrome
Graphite
Magnesia
Silica

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