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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
Related Mcqs:
- Carbon refractories have very high __________________?
- A. Wetting characteristics B. Refractoriness C. Thermal conductivity D. Both B. and C....
- Firing of refractory brick is done to __________________?
- A. Dehydrate the dried refractory B. Develop stable mineral forms in them C. Form ceramic bonds necessary for development of high crushing strength in the finished product D. All A., B. and C....
- With increase in the alumina content in firebricks, its fusion point (refractoriness) ?
- A. Decreases linearly B. Remains unchanged C. Increases D. Decreases...
- Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory_________________?
- A. Mortars B. Cements C. Castables D. None of these...
- The highest melting pure oxide (m.p. > 3000°C)is___________________?
- A. Thoria B. Alumina C. Beryllia D. Zirconia...
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