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.Management Sciences
A. Mainly contains quartz
B. Is not stable at high temperature
C. Transforms to other allotropic forms i.e. Tridymite and Cristobalite involving very high
volume changes
D. All A., B. and C.
Related Mcqs:
- Conversion of silica mineral to Cristobalite is accompanied by reduction in its ____________________?
- A. Volume B. Specific gravity C. Both A. & B. D. Neither A. nor B....
- Insulating refractories should have_______________?
- A. High porosity B. Low thermal conductivity C. Both A. and B. D. Neither A. not B....
- The main raw material for manufacture of silicon carbide refractories is_________________?
- A. Corundum B. Carborundum C. Bauxite D. Periclase...
- Which brick undergoes maximum shrinkage on drying ?
- A. Tar bonded dolomite bricks B. Fireclay bricks C. Magnesite bricks D. Chromite bricks...
- Which is not a natural insulating material ?
- A. Diatomaceous earth/kieselgur B. Asbestos C. Vermiculite D. None of these...
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