Porosity is induced in insulating refractories by adding________________?

Related Mcqs:

Si percentage in silica refractories used in the walls of coke oven is about______________________?

A. 45 B. 60 C. 80 D. 95...

Ferromagnetic ceramic material is not used in the__________________?

A. Thermal insulation B. Transformers C. Magnetic switches D. Television sets...

With increase in the porosity, thermal spalling resistance of fireclay brick___________________?

A. Increases B. Decreases C. Remain same D. May increase or decrease...

Spalling tendency of refractories is reduced by increasing its_________________?

A. Porosity B. Specific gravity C. Thermal conductivity D. Strength...

Silica bricks are never used for lining the____________________?

A. Beehive coke ovens B. By-product coke ovens C. Dome of blast furnace stoves D. Roof of open hearth furnace...