A. High thermal conductivity
B. Low porosity
C. Non-wetting characteristics
D. High density
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Related Mcqs:
- Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, because of its_______________?
- A. Non-wetting characteristic B. High thermal conductivity C. High crushing strength D. None of these...
- Hot blast main (carrying air at 1000°C) in blast furnace are lined with ______________ bricks?
- A. Silica B. Fireclay C. Magnesite D. Zirconia...
- Roof of a basic open hearth furnace is lined with ______________ bricks?
- A. Silica B. Fireclay C. Dolomite D. Magnesite...
- Bottom of basic open hearth furnace are constructed of__________________?
- A. Dead burnt magnesite ramming mass B. Porous fireclay bricks C. Semi-silica bricks D. Silicon carbide bricks...
- Carbon refractory blocks ___________________?
- A. Are wetted by molten iron B. Are used in the hearth of blast furnace C. Are acidic in nature D. All A., B. and C....
- Outer combustion chamber of blast furnace stove is lined with _____________ bricks?
- A. Fireclay B. Silica C. Chrome magnesite D. Zirconia...
- Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves ?
- A. High refractoriness B. High resistance to spalling C. High strength and density D. All A., B. and C....
- Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns ?
- A. 1800 B. 2200 C. 2400 D. 2700...
- Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the_________________?
- A. Washing action of metal B. Corrosion by layer of slag C. Both A. & B. D. Neither A. nor B....
- Cold crushing strength of ordinary fireclay brick is about 950 kg/cm2. On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as ______________ kg/cm2?
- A. 450 B. 250 C. 150 D. 65...
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