A. 770
B. 570
C. 270
D. 70
A. Resistance to abrasion
B. Resistance to slag penetration
C. Stability of volume at high temperature
D. Resistance to corrosion by slag
A. Superduty fireclay
B. Silica
C. Chromite
D. None of these
Roof of a basic electric furnace is made of ______________ bricks? Read More »
Stoichiometry A. Fireclay
B. Silica
C. Chrome magnesite
D. Zirconia
Outer combustion chamber of blast furnace stove is lined with _______________ bricks? Read More »
Stoichiometry A. Not required to resist the corrosive action of basic slag
B. Not subjected to fluctuation in temperature
C. Used for raising & maintaining high temperature
D. Both B. and C.
A. Cork
B. Saw dust
C. Sand
D. Chemically prepared foam
A. Oxidising atmosphere
B. Reducing atmosphere
C. Electric furnace
D. Neutral atmosphere
Test piece for determination of RUL of a refractory is heated in a/an__________________? Read More »
Stoichiometry A. Increases
B. Decreases
C. Remain same
D. May increase or decrease
A. Density
B. Specific heat
C. Thermal conductivity
D. None of these
Thermal diffusivity of a refractory brick is high, when its ______________ is high? Read More »
Stoichiometry A. Reduced by the addition of acid oxides
B. Increased by the addition of acid oxides
C. Not affected by the addition of acid oxides
D. Always less than 1000°C
Fusion point of a basic refractory material is________________? Read More »
Stoichiometry