A. Contains both alumina and silica
B. Is crushed firebrick
C. Is a non-plastic material
D. All A., B. and C.
Grog__________________? Read More »
Refractory Technology A. Silica bricks
B. Fireclay bricks
C. Bauxite bricks
D. Magnesia bricks
Which of the following is not an acidic refractory? Read More »
Refractory Technology A. 800-1000
B. 1000-1200
C. 1600-1800
D. 2400-2600
Firing temperature of magnesite bricks is about _____________ °C? Read More »
Refractory Technology A. Muffle furnace
B. Zinc smelting furnace
C. Ceramic recuperators
D. All A., B. and C.
Silicon carbide refractories are used in the _____________? Read More »
Refractory Technology A. Pug
B. Ball
C. Tube
D. Rod
Mixing of ground refractory material and water is done in a ______________ mill? Read More »
Refractory Technology A. Resistance to slag attack increases
B. Spalling resistance reduces
C. Both A. and B.
D. Neither A. nor B.
With increase in the density of silica refractories, its_______________? Read More »
Refractory Technology A. MgAl2O4
B. MgAl2O3
C. MgSO4
D. MgAl2O3.2H2O
‘Spinel’, a refractory mineral is chemically represented as____________________? Read More »
Refractory Technology A. 35-40
B. 55-60
C. 80-85
D. > 94
SiO2 percentage in firebrick is about____________________? Read More »
Refractory Technology A. Al2O3
B. CaO
C. SiO2
D. All A., B. & C.
Which of the following impurities reduces the refractoriness of magnesite bricks ? Read More »
Refractory Technology A. Less fusion point
B. Better spalling resistance
C. Both A. and B.
D. Neither A. not B.
Semi-silica bricks compared to silica bricks have_______________? Read More »
Refractory Technology