Which is the stable form of silica below 870°C ?

Related Mcqs:

Which one contains maximum percentage of Al2O3 ?

A. Firebrick B. Sillimanite C. Magnesite D. Aluminous firebrick...

Refractories are dried in the _______________?

A. Rotary kilns B. Tunnel kilns C. Sun D. None of these...

Chromite refractories are used in_______________?

A. Bottom of soaking pits B. Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other C. Both A. & B. D. Neither A. and B....

10 to 30% magnesite is added to Chromite to produce chrome-magnesite refractories. Magnesite addition is mainly done to improve the _____________ of Chromite?

A. Spalling resistance B. Refractoriness C. Crushing strength D. Resistance to slag...

Which of the following is not a high alumina refractory material ?

A. Kyanite B. Sillimanite C. Diaspore D. Periclase...