Pitch and creosote oil
Light oil and pitch
Anthracene and crecosote oil
Solar oil and pitch
✅ The correct answer is option A.
Chemical Engineering MCQs
In Lurgi coal gasifier,
Coking coals cannot be used
Low carbon conversion efficiency is achieved
Entrainment of solids is higher
Larger quantity of coal can be processed
✅ The correct answer is option D.
Which of the following is not a product of tar distillation?
Phenol & naphthalene
Benzol & pitch
Anthracene & creosote
None of these
✅ The correct answer is option D.
During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.
Density
Porosity
Electrical resistivity
None of these
✅ The correct answer is option A.
Washing of coal is done to reduce the
Inherent impurities
Adhering impurities
Mineral matter
Both B and C
✅ The correct answer is option D.
Main constituent of natural gas is
CH₄ (upto 90%)
C₂H₆
C₃H₈
H₂
✅ The correct answer is option A.
Semi-silica bricks compared to silica bricks have
less fusion point.
better spalling resistance.
both (a) and (b).
neither (a) not (b).
✅ The correct answer is option C.
Chrome magnesite bricks are
acidic in nature.
neutral in nature.
having higher RUL than silica bricks.
made by mixing 30% chromite and 70% periclase.
✅ The correct answer is option C.
Cermets are
composite material containing both ceramic & metallic constituents.
having high strength & resistance to high temperature.
used in space vehicles, missiles & nuclear energy plants.
all (a), (b) and (c).
✅ The correct answer is option D.
‘Super refractories’ are made from pure
carbides
oxides
borides
nitrides
✅ The correct answer is option B.