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

RUL
Permanent linear change
Resistance to CO attack
Modulus of rupture

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Refractory Technology
Thermal conductivity of refractory bricks

Is independent of its porosity and is maximum for insulating bricks
Decreases with decreases in porosity
Increases with decrease in porosity
Increases with the amount of air entrapped in pores

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