A. Chrome magnesite
B. Magnesite
C. Dolomite
D. Silicon carbide
Related Mcqs:
- Sillimanite (Al2O3.SiO2) refractory, which is a neutral refractory, is not used in________________?
A. Pottery furnace
B. Glass melting furnace
C. Crucibles
D. Gas retorts - Which is a basic refractory ?
A. Fireclay
B. Silica
C. Chrome magnesite
D. None of these - Fusion point of a basic refractory material is__________________?
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 - Refractory castables are used for__________________?
A. Producing monolithic linings
B. Patch work
C. Minimising the number of joints in the structure
D. All A., B. and C. - Fusion point of an acidic refractory material is________________?
A. Increased by the addition of basic oxides
B. Reduced by the addition of basic oxides
C. Not affected by the addition of basic oxides
D. Always more than 2500°C - Which of the following is not an acidic refractory?
A. Silica bricks
B. Fireclay bricks
C. Bauxite bricks
D. Magnesia bricks - Which is not an alumino-silicate refractory ?
A. Fireclay bricks
B. Mullite bricks
C. Tar dolomite bricks
D. High alumina bricks - High porosity refractory bricks have _______________?
A. Poor resistance to the penetration of molten slag, metal & flue gases
B. Poor heat conductivity & low strength
C. Better thermal spalling resistance
D. All A., B. and C. - Sillimanite is a _____________ refractory?
A. Basic
B. Neutral
C. High alumina
D. Insulating - Which is an acidic refractory ?
A. Magnesite
B. Dolomite
C. Fireclay
D. Chrome magnesite
