A. Tridymite
B. Cristobalite
C. Quartz
D. None of these
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Related Mcqs:
- Which is the most stable crystalline form of silica at room temperature ?
- A. Quartz B. Cristobalite C. Tridymite D. None of these...
- Which is the stable form of silica upto 1470°C ?
- A. Quartz B. Cristobalite C. Tridymite D. None of these...
- Which is the stable form of silica between 1470°C and the melting point 1713°C ?
- A. Cristobalite B. Tridymite C. Quartz D. None of these...
- 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....
- Silica bricks have low spalling resistance below 600°C, due to its________________?
- A. Very high thermal conductivity B. High co-efficient of expansion upto this temperature C. High thermal diffusivity D. Low refractoriness...
- Which form of silica has the highest specific gravity ?
- A. Quartz B. Cristobalite C. Tridymite D. All have the same specific gravity...
- An indication of degree of firing in silica brick is its____________________?
- A. Specific gravity B. Fusion point C. RUL D. None of these...
- 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....
- The maximum linear expansion of silica bricks during firing is about ______________ percent?
- A. 0.5 B. 1 C. 2 D. 3.5...
- Fusion temperature of pure silica (SiO2) is _______________ °C?
- A. 1350 B. 1715 C. 2570 D. 2800...
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