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REFRACTORY TECHNOLOGY

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

Thoria
Fireclay
Silicon carbide
High alumina

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

Muffle furnace
Blast furnace
Recuperators
Coke oven regenarators

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

Density
Specific heat
None of these
Thermal conductivity

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

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

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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
50 and 50
80 and 20
60 and 40

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