321. Paraffins are desirable in lubricating oil, as it has got high
viscosity
viscosity index
smoke point
pour point
✅ The correct answer is option C.
Petroleum Refinery Engineering MCQs
322. Electrical desalting of crude oil removes the __________ impurities.
oleophilic
oleophobic
both (a) and (b)
neither (a) nor (b)
✅ The correct answer is option B.