1. Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity)
2. Which is not an alumino-silicate refractory?
3. Electrical resistor bars are made of
4. With increasing alumina content, the fusion point of high alumina refractories
5. Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material?
6. Which of the following is not a neutral refractory ?
7. Refractoriness under load (RUL) is the most important property for the refractory bricks
8. Spalling resistance of a refractory can not be increased by
9. Fireclay refractories have
10. Which is a basic refractory ?
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