Refractory Technology

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

A. Aluminium phosphate
B. Water
C. Lime
D. Plaster of Paris

A. Roof lining of basic open hearth & other basic furnaces
B. Reheating furnaces
C. Soaking pits
D. All A., B. and C.

A. Volume
B. Specific gravity
C. Both A. & B.
D. Neither A. nor B.

A. Removal of water of hydration
B. Vitrification
C. Decrease in crushing strength
D. Development of stable mineral form

A. Reduce its shrinkage on heating
B. Impart greater spalling resistance
C. Enhance the strength of fired refractories
D. All A., B. and C.

A. Combustion chamber of blast furnace stoves
B. Electric furnaces
C. Highly chemical resistant equipments
D. Blast furnace hearth

A. 10
B. 100
C. 500
D. 1000

A. Powdered naphthalene
B. Ammonium chloride/sulphate
C. Calcium phosphate
D. All A., B. and C.

A. Softening temperature
B. Spalling resistance
C. Electrical conductivity
D. Resistance to slag attack