Which one contains minimum percentage of SiO2 ?

Related Mcqs:

Silicon carbide refractories have very low ___________________?

A. Refractoriness (< 1700°C) B. Thermal conductivity C. Resistance to thermal shock D. None of these...

High alumina refractories are used in the ___________________?

A. Dome of blast furnace stoves B. Electric arc furnace roof C. Glass melting furnaces D. All A., B. and C....

Basic bricks are not made of ___________________?

A. Fireclay B. Magnesite C. Forsterite D. Chromite...

To resist spalling tendency, a refractory should have________________?

A. Greater diffusivity B. Low specific heat C. Low thermal co-efficient of expansion D. All A., B. and C....

Magnesite chrome refractories____________________?

A. Have better spalling resistance than chrome magnesite refractories B. Have very low thermal co-efficient of expansion C. Are not at all resistant to the corrosive action of iron oxide D. Have very low (50 kg/cm2) cold crushing strength (C.C.S.), and cannot be used in metalcase form...