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REFRACTORY TECHNOLOGY

Refractory Technology
__________ bricks are used in the burning zone of a cement rotary kiln.

High alumina
Silicon carbide
Thoria
Fireclay

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Refractory Technology
High thermal conductivity of a refractory material is not important, when it is to be used in the

Blast furnace
Recuperators
Coke oven regenarators
Muffle furnace

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Refractory Technology
Thermal diffusivity of a refractory brick is high, when its __________ is high.

None of these
Density
Thermal conductivity
Specific heat

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Refractory Technology
Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the

Corrosion by layer of slag
Neither A nor B
Both A & B
Washing action of metal

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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.

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

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