81. Which of the following additives improves the cetane number of diesel ?
Amyl nitrate
Ethyl mercaptan
Napthenic acid
Tetra ethyl lead
✅ The correct answer is option A.
Petroleum Refinery Engineering MCQs
82. Which of the following is not an important property of fuel oil/furnace oil ?
Sulphur content
Viscosity
Aniline point
Flash point
✅ The correct answer is option C.
83. Sulphur content in lighter and heavier petroleum products is generally determined respectively by
lamp method and bomb method.
bomb method and lamp method.
bomb method and quartz tube method.
quartz tube method and lamp method.
✅ The correct answer is option B.
84. Sweetening of petroleum product means the removal of
sulphur & its compounds
water
organic impurities
wax
✅ The correct answer is option A.
85. The most important property for a jet fuel is its
viscosity
freezing point
calorific value
flash point
✅ The correct answer is option B.
86. Dearomatisation of kerosene (by liquid sulphur dioxide extraction) is done to
increase its smoke point.
improve its oxidation stability.
decrease the breathing loss.
none of these.
✅ The correct answer is option B.
87. The pressure (kg/cm2 ) and temperature (°C) maintained in electrical desalters for crude oil are respectively
10 and 120
1 and 200
50 and 250
10 and 300
✅ The correct answer is option A.
88. Solvent used for dewaxing of petroleum products are
furfural
methyl ethyl ketone (MEK)
propane
both(b)&(c)
✅ The correct answer is option D.
89. LPG when brought to atmospheric pressure & temperature will be a
liquid lighter than water.
liquid heavier than water.
gas lighter than air.
gas heavier than air.
✅ The correct answer is option D.
90. The most widely used crude topping column in refineries is the __________ column.
bubble-cap
packed bed
fluidised bed
perforated plate
✅ The correct answer is option A.