A. 0.5
B. 1
C. 2
D. 3.5
Related Mcqs:
- Semi-silica bricks compared to silica bricks have_______________?
A. Less fusion point
B. Better spalling resistance
C. Both A. and B.
D. Neither A. not B. - The linear thermal expansion of _______________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent?
A. Fireclay
B. Silica
C. Magnesite
D. Corundum - Porosity of silica bricks varies from ______________ percent?
A. 5 to 10
B. 20 to 30
C. 45 to 60
D. 60 to 75 - Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as ______________ percent?
A. 10
B. 15
C. 20
D. 30 - An indication of degree of firing in silica brick is its____________________?
A. Specific gravity
B. Fusion point
C. RUL
D. None of these - Firing temperature of magnesite bricks is about _____________ °C?
A. 800-1000
B. 1000-1200
C. 1600-1800
D. 2400-2600 - Firing temperature is minimum (1250-1400 °C) for _______________ bricks?
A. Fireclay
B. Direct bonded basic
C. Silica
D. Magnesite - Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material ?
A. Aluminium phosphate
B. Water
C. Lime
D. Plaster of Paris - Use of higher percentage of lime for bonding silica bricks, reduces their__________________?
A. Strength
B. Abrasion resistance
C. Both A. & B.
D. Neither A. nor B. - Silica bricks are never used for lining the____________________?
A. Beehive coke ovens
B. By-product coke ovens
C. Dome of blast furnace stoves
D. Roof of open hearth furnace
