1. Highest melting (m.p = 3070°C) oxide refractory is
2. Fusion point of an acidic refractory material is
3. Which of the following is not a high alumina refractory material?
4. Magnesite refractories are generally not used in the
5. Silica bricks are never used for lining the
6. 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.
7. Magnesite chrome bricks are used in the
8. Which of the following bricks has the most close values of RUL and PCE?
9. __________ is the measure of the strength of refractory under the combined effect of temperature & load.
10. An indication of degree of firing in silica brick is its
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