Walls, roofs & combustion chambers of annealing furnaces are made of ______________ bricks?

Related Mcqs:

Carbon refractories have very high __________________?

A. Wetting characteristics B. Refractoriness C. Thermal conductivity D. Both B. and C....

Ferromagnetic ceramic material is not used in the__________________?

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

Which of the following is not a neutral refractory ?

A. Silicon carbide B. Magnesite C. Chromite D. Graphite...

Magnesite refractories have low resistance to___________________?

A. Attack by basic slag B. Abrasion C. Disintegration on sudden change of temperature D. Both B. and C....

Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for _____________ bricks?

A. Fireclay B. Silica C. Dolomite D. Very low alumina...