21. Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks.
22. Slide gates in teeming laddie used for steel pouring in ingot moulds is lined with __________ bricks.
23. Roof of a basic open hearth furnace is lined with __________ bricks.
24. Bauxite calcining rotary kilns are lined with __________ bricks.
25. Lower part of hot metal mixer are lined with __________ bricks.
26. Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity).
27. Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.
28. Which one contains maximum percentage of Al2O3?
29. Which brick undergoes maximum shrinkage on drying?
30. __________ is not a single oxiderefractory.
Read More Section(Refractory Technology)
Each Section contains maximum 100 MCQs question on Refractory Technology. To get more questions visit other sections.