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

1. Electrical resistor bars are made of

 
 
 
 

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. 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. Which is a basic refractory ?

 
 
 
 

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

 
 
 
 

8. Fireclay refractories have

 
 
 
 

9. Which is not an alumino-silicate refractory?

 
 
 
 

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

 
 
 
 

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