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

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

 
 
 
 

2. Electrical resistor bars are made of

 
 
 
 

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

 
 
 
 

4. Which is not an alumino-silicate refractory?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

7. Fireclay refractories have

 
 
 
 

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

 
 
 
 

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

 
 
 
 

10. Which is a basic refractory ?

 
 
 
 

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