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

1. Fireclay refractories have

 
 
 
 

2. Electrical resistor bars are made of

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

7. Which is a basic refractory ?

 
 
 
 

8. Which is not an alumino-silicate refractory?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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