40 TOP REFRACTORY TECHNOLOGY Online Test – Multiple Choice Questions and Answers

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

 
 
 
 

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

 
 
 
 

3. Which is not an alumino-silicate refractory?

 
 
 
 

4. Electrical resistor bars are made of

 
 
 
 

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

 
 
 
 

6. Which is a basic refractory ?

 
 
 
 

7. Fireclay refractories have

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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