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

1. Which is a basic refractory ?

 
 
 
 

2. Fireclay refractories have

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

8. Electrical resistor bars are made of

 
 
 
 

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

 
 
 
 

10. Which is not an alumino-silicate refractory?

 
 
 
 

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