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.
Magnesite chrome bricks are used in the___________________? Read More »
Refractory Technology 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
Which of the following does not occur during firing/burning of refractories ? Read More »
Refractory Technology A. Reduce its shrinkage on heating
B. Impart greater spalling resistance
C. Enhance the strength of fired refractories
D. All A., B. and C.
Grog addition in fireclay during brick manufacture is done to_________________? Read More »
Refractory Technology A. Combustion chamber of blast furnace stoves
B. Electric furnaces
C. Highly chemical resistant equipments
D. Blast furnace hearth
Carbon bricks are not used in the lining of the_________________? Read More »
Refractory Technology A. 10
B. 100
C. 500
D. 1000
A. Powdered naphthalene
B. Ammonium chloride/sulphate
C. Calcium phosphate
D. All A., B. and C.
Porosity is induced in insulating refractories by adding________________? Read More »
Refractory Technology A. Softening temperature
B. Spalling resistance
C. Electrical conductivity
D. Resistance to slag attack
Segar cones are used for the determination of ____________ of refractories? Read More »
Refractory Technology A. Increased by the addition of basic oxides
B. Reduced by the addition of basic oxides
C. Not affected by the addition of basic oxides
D. Always more than 2500°C
Fusion point of an acidic refractory material is________________? Read More »
Refractory Technology