Petroleum Refinery Engineering - Study Mode
[#176] Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO 2 extraction (Edeleanu process), its smoke point may become __________ mm.
Correct Answer
(C) 25
[#177] Smoke point of kerosene expresses its
Correct Answer
(A) Burning characteristics
[#178] Mercapsol and Unisol processes are meant for the
Correct Answer
(B) Removal of mercaptans
[#179] Older crude petroleum
Correct Answer
(D) All of the above
Explanation
Solution: Older crude petroleum is generally considered light and better because it has undergone natural refining processes over time. It typically gives more distillates , which are the valuable fractions obtained during refining. Additionally, older crude gives less tar , making it more desirable for refining purposes. Therefore, all the statements are true, making Option D: All of the above the correct answer.
[#180] Olefins are
Correct Answer
(B) Unsaturated cyclic compounds (hydrocarbons)
Explanation
Solution: In petroleum refinery engineering, olefins are unsaturated cyclic compounds (hydrocarbons) (Option B). Olefins, also known as alkenes, are a class of hydrocarbons containing at least one carbon-carbon double bond. They are unsaturated compounds because they contain fewer hydrogen atoms than the corresponding saturated hydrocarbons. Olefins are widely used in the petrochemical industry as feedstocks for producing various chemicals, including plastics, solvents, and synthetic fibers. Therefore, the correct option is Option B: Unsaturated cyclic compounds (hydrocarbons) .