Petroleum Refinery Engineering - Study Mode
[#156] Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its
Correct Answer
(C) Both A & B
[#157] Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________ ptb (pounds per thousand barrel).
Correct Answer
(B) 3
[#158] Aniline point test of an oil qualitatively indicates the __________ content of an oil.
Correct Answer
(C) Aromatic
Explanation
Solution: Definition: The aniline point of an oil is the minimum temperature at which the oil is completely miscible with an equal volume of aniline. Purpose of test: It is used as a qualitative measure of the aromatic content in petroleum oils. Reason: Aromatic hydrocarbons mix more readily with aniline than paraffinic hydrocarbons, resulting in a lower aniline point for oils with higher aromatic content. Conversely, oils rich in paraffins have higher aniline points. Conclusion: The aniline point test gives an indication of the aromatic content of an oil — lower aniline point means higher aromatic content, and higher aniline point means lower aromatic content.
[#159] Char value of Kerosene is the amount of charred oil deposition on the wick obtained after burning it in a standard wick lamp at a standard rate for 24 hours. Char value of a good quality kerosene should be less than __________ mg/kg of kerosene.
Correct Answer
(B) 20
[#160] Gasoline yield in catalytic reforming of naphtha may be about __________ percent by weight.
Correct Answer
(A) 85