superduty fireclay
silica
chromite
none of these
✅ The correct answer is option B.
Refractory Technology MCQs
Which is required in an insulating refractory ?
High thermal conductivity
Low porosity
Both (a) and (b)
Neither (a) nor (b)
✅ The correct answer is option D.
Fireclay bricks are used in the
furnaces allowed to cool frequently
flues
chimney linings
all (a), (b) and (c)
✅ The correct answer is option D.
Fireclay refractories
are not resistant to the action of basic slags.
combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc.
shrink during firing
all (a), (b) and (c)
✅ The correct answer is option D.
Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks.
silica
fireclay
magnesite
zirconia
✅ The correct answer is option B.
Tar dolomite bricks are used in the
basic Bessemer converter
basic open hearth furnace
electric furnaces
all (a), (b) and (c)
✅ The correct answer is option D.
Periclase is
crystalline form of MgO.
MgCO3.
ZrSO4.
amorphous magnesite.
✅ The correct answer is option A.
Which furnace consumes maximum refractory annually in an integrated steel plant ?
Soaking pit
Blastfurnace
L.D. converter
Coke ovens
✅ The correct answer is option C.
Which one contains maximum percentage of Al2O3 ?
Firebrick
Sillimanite
Magnesite
Aluminous firebrick
✅ The correct answer is option B.
Fireclay bricks are never used in the
beehive oven
coke oven walls
zinc roaster
lead blast furnace
✅ The correct answer is option B.