Naharkatiya
Digboi
Kochin
Madras
✅ The correct answer is option B.
Petroleum Refinery Engineering MCQs
142. Which of the following has the lowest cetane number ?
Aromatics
i-paraffins
Naphthene
Olefins
✅ The correct answer is option A.
143. Which of the following constituents present in petroleum is responsible for ash formation?
Nitrogen compounds
Organometallic compounds
Sulphur compounds
Oxygen compounds
✅ The correct answer is option C.
144. Most widely used solvent for dewaxing is
methyl-ethyl-ketone (MEK)
naphtha
petroleum ether
sodium plumbite
✅ The correct answer is option A.
145. The best method of determining sulphur in crude oil is by the __________ method.
Kjeldah
Duma
Bomb calorimeter
Junkar’s calorimeter
✅ The correct answer is option C.
146. Name the hydrocarbon having the poorest oxidation stability.
naphthene
olefin
paraffin
aromatics
✅ The correct answer is option D.
147. In petroleum refining, the process used for conversion of hydrocarbons to aromatics is
catalytic cracking
catalytic reforming
hydrotreating
alkylation
✅ The correct answer is option B.
148. Butadiene is a/an
di-olefin
naphthene
aromatic
olefin
✅ The correct answer is option A.
149. Higher viscosity of lubricating oil usually signifies
lower Reid vapour pressure.
higher acid number.
higher flash point and fire point.
lower flash point and fire point.
✅ The correct answer is option C.
150. Gum formation in stored gasoline is mainly due to the
alkylation of unsaturates.
presence of sulphur.
oxidation & polymerisation of unsaturates.
higher aromatic content.
✅ The correct answer is option C.