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

1. Which is a basic refractory ?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

6. Fireclay refractories have

 
 
 
 

7. Electrical resistor bars are made of

 
 
 
 

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

 
 
 
 

9. Which is not an alumino-silicate refractory?

 
 
 
 

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

 
 
 
 

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