Practice MCQ Questions and answers on Stoichiometry Mcqs for Chemical

A. Spalling resistance

B. Refractoriness

C. Refractoriness under load (RUL)

D. None of these

A. 1520-1630

B. 1630-1670

C. > 1730

D. > 2000

A. Increases

B. Decreases

C. Remain same

D. May increase or decrease

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.

A. Beryllia

B. Carborundum

C. Corundum

D. Thoria

A. Fireclay

B. Silicon carbide

C. Corundum

D. Siliceous fireclay

A. High insulating properties

B. Low heat capacity

C. Low thermal conductivity

D. Greater strength

A. Beehive coke ovens

B. By-product coke ovens

C. Dome of blast furnace stoves

D. Roof of open hearth furnace

A. Are not resistant to the action of basic slags

B. Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc

C. Shrink during firing

D. All A., B. and C.

A. Cupola

B. Gas producer

C. Bottom of hot metal mixer

D. Roof of open hearth furnace