Refractory Technology Online Test

1. Fireclay refractories have

2. Refractoriness under load (RUL) is the most important property for the refractory bricks

3. Electrical resistor bars are made of

4. Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity)

5. Which is a basic refractory ?

6. Spalling resistance of a refractory can not be increased by

7. With increasing alumina content, the fusion point of high alumina refractories

8. Which is not an alumino-silicate refractory?

9. Which of the following is not a neutral refractory ?

10. Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material?