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. Which of the following is not a neutral refractory ?

 
 
 
 

3. Which is a basic refractory ?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

6. Fireclay refractories have

 
 
 
 

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

 
 
 
 

8. Which is not an alumino-silicate refractory?

 
 
 
 

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

 
 
 
 

10. Electrical resistor bars are made of

 
 
 
 

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