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

1. Which is not an alumino-silicate refractory?

 
 
 
 

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

 
 
 
 

3. Fireclay refractories have

 
 
 
 

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. Electrical resistor bars are made of

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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