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Refractory Technology

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

Silica
Fireclay
Corundum
Magnesite

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Refractory Technology
Which of the following does not occur during firing/burning of refractories?

Removal of water of hydration
Vitrification
Decrease in crushing strength
Development of stable mineral form

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Refractory Technology
Pure oxide refractories are generally monocrystaliine in nature and are self bonded __________ bricks are generally used as moderator in nuclear reactors.

Carborundum
Thoria
Beryllia
Corundum

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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.

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

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Refractory Technology
Dilatometer is used for the determination of __________ of refractories.

RUL
Modulus of rupture
Permanent linear change
Resistance to CO attack

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Refractory Technology
Chrome magnesite brick is not used for lining the

Bottom hearth of reheating furnace
Coke oven regenerator
Burning zone of limestone rotary kilns
Hearth of soaking pits

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