A. Firebrick
B. Sillimanite
C. Semi-silica
D. Aluminous firebrick
Which one contains minimum percentage of SiO2 ? Read More »
Refractory Technology A. Porosity
B. RUL
C. Specific gravity
D. Thermal conductivity
A. Kyanite
B. Sillimanite
C. Diaspore
D. Periclase
Which of the following is not a high alumina refractory material ? Read More »
Refractory Technology A. Diatomaceous earth/kieselgur
B. Asbestos
C. Vermiculite
D. None of these
Which is not a natural insulating material ? Read More »
Refractory Technology A. Lime
B. Basic
C. Acid
D. None of these
Magnesite bricks have poor resistance to attack by _____________ slag? Read More »
Refractory Technology A. Tar dolomite
B. Carbon
C. Silica
D. Fireclay
______________ bricks should not be used in oxidising atmosphere? Read More »
Refractory Technology A. Strength
B. Thermal conductivity
C. Spalling resistance
D. None of these
With decrease in porosity, the ______________ of the refractories decreases? Read More »
Refractory Technology A. Silica
B. Fireclay
C. Magnesite
D. Zirconia
A. 0.5
B. 1
C. 2
D. 3.5
A. Fireclay
B. Silica
C. Dolomite
D. Very low alumina
