With increase in the alumina content, the refractoriness of high alumina refractories_________________?

Related Mcqs:

Quartz is__________________?

A. Stable form of silica upto 870°C B. Converted to Tridymite on firing between 870 to 1470°C C. Transformed to Cristobalite on heating above 1470°C D. All A., B. and C....

1 BTU/lb.←°F is equivalent to ____________ kcal/kg.°C?

A. 1 B. 2.42 C. 1.987 D. 4.97...

Magnesite refractories are used for the construction of those furnaces, which are_______________?

A. Not required to resist the corrosive action of basic slag B. Not subjected to fluctuation in temperature C. Used for raising & maintaining high temperature D. Both B. and C....

Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m3. The diffusivity of aniline in air is 0.74 × 10-5m2/s. The numerical value of mass transfer co-efficient is 7.4 × 10-3. Its units are_______________________?

A. m/s B. cm/s C. mole/m2.s.Pa D. k.mole/m2.s.Pa...

Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?

A. PvB B. xB.PvB C. (Patm – Pvw)xB D. xB.Patm...