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

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

4. Which is a basic refractory ?

 
 
 
 

5. Fireclay refractories have

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

9. Which is not an alumino-silicate refractory?

 
 
 
 

10. Electrical resistor bars are made of

 
 
 
 

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