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

1. Which is a basic refractory ?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

6. Fireclay refractories have

 
 
 
 

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

 
 
 
 

8. Electrical resistor bars are made of

 
 
 
 

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

 
 
 
 

10. Which is not an alumino-silicate refractory?

 
 
 
 

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