_____________ nozzles are used in continuous casting of steel?
_____________ nozzles are used in continuous casting of steel?
A. Zircon
B. Thoria
C. Carborundum
D. Beryllia
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Panel test determines the _____________ of refractories?
Panel test determines the _____________ of refractories?A. Fusion point
B. Spalling resistance
C. Slag penetration resistance
D. Refractoriness under load (RUL)___________________ is the measure of the strength of refractory under the combined effect of temperature & load ?
___________________ is the measure of the strength of refractory under the combined effect of temperature & load ?A. Porosity
B. RUL
C. Specific gravity
D. Thermal conductivityMagnesite bricks have poor resistance to attack by _____________ slag?
Magnesite bricks have poor resistance to attack by _____________ slag?A. Lime
B. Basic
C. Acid
D. None of theseMaximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as ______________ percent?
Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as ______________ percent?A. 10
B. 15
C. 20
D. 30The main raw material for manufacture of silicon carbide refractories is_________________?
The main raw material for manufacture of silicon carbide refractories is_________________?A. Corundum
B. Carborundum
C. Bauxite
D. PericlaseWhich one expands on heating ?
Which one expands on heating ?A. Silica bricks
B. Fireclay bricks
C. Both A. & B.
D. Neither A. nor B.