Al2O3
CaO
SiO2
all (a), (b) & (c)
✅ The correct answer is option D.
Chemical Engineering MCQs
Which of the following is not an acidic refractory ?
Silica bricks
Fireclay bricks
Bauxite bricks
Magnesia bricks
✅ The correct answer is option D.
Which is the stable form of silica between 1470°C and the melting point 1713°C ?
Cristobalite
Tridymite
Quartz
None of these
✅ The correct answer is option A.
Ferromagnetic ceramic material is not used in the
thermal insulation
transformers
magnetic switches
television sets
✅ The correct answer is option A.
Which brick undergoes maximum shrinkage on drying ?
Tar bonded dolomite bricks
Fireclay bricks
Magnesite bricks
Chromite bricks
✅ The correct answer is option B.
Carborundum used for making crucibles for melting non-ferrous metals is chemically
silicon carbide
silicon nitride
crystalline magnesia
zirconium sulphate
✅ The correct answer is option A.
Maximum alumina content in high alumina refractory can be as high as __________ percent.
30
50
70
90
✅ The correct answer is option D.
Carbon refractory blocks
are wetted by molten iron.
are used in the hearth of blast furnace.
are acidic in nature.
all (a), (b) and (c).
✅ The correct answer is option B.
Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent.
55
70
80
90
✅ The correct answer is option D.
A steel member used in the furnace construction to take the thrust of the brickwork is called
buckstay
breast wall
armouring
baffle
✅ The correct answer is option A.