Which is not a basic refractory ?
Which is not a basic refractory ?
A. Chrome magnesite
B. Magnesite
C. Dolomite
D. Silicon carbide
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Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for _____________ bricks?
Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for _____________ bricks?A. Fireclay
B. Silica
C. Dolomite
D. Very low aluminaThoria__________________?
Thoria__________________?A. Has high fusion temperature (> 3000°C) but poor resistance to thermal shock
B. Has high resistance to basic slags
C. Which is expensive & radioactive, is used in crucibles for melting high purity metals
D. All A., B. and C.With decrease in porosity, the ______________ of the refractories decreases?
With decrease in porosity, the ______________ of the refractories decreases?A. Strength
B. Thermal conductivity
C. Spalling resistance
D. None of thesePorosity of silica bricks varies from ______________ percent?
Porosity of silica bricks varies from ______________ percent?A. 5 to 10
B. 20 to 30
C. 45 to 60
D. 60 to 75Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant ?
Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant ?A. Soaking pits
B. Reheating furnace
C. L.D. converter
D. Rotary lime kilnFireclay bricks are used in the___________________?
Fireclay bricks are used in the___________________?A. Furnaces allowed to cool frequently
B. Flues
C. Chimney linings
D. All A., B. and C.