Porosity of fireclay refractories is _______________ percent?

Related Mcqs:

Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns ?

A. 1800 B. 2200 C. 2400 D. 2700...

Periclase is___________________?

A. Crystalline form of MgO B. MgCO3 C. ZrSO4 D. Amorphous magnesite...

Grog__________________?

A. Contains both alumina and silica B. Is crushed firebrick C. Is a non-plastic material D. All A., B. and C....

Hot face insulating linings of high purity alumina fused mullite are used, where_________________?

A. Very high temperatures are involved B. Highly reducing conditions are involved C. Presence of iron or silica is harmful D. All A., B. and C....

Crushing strength of a refractory____________________?

A. Increases with rise in service temperature B. Decreases with rise in service temperature C. Is unaffected with change in service temperature D. Decreases with increase in porosity...