Chemical Engineering - Petroleum Refinery Engineering

1.
Presence of aromatics in
diesel increases its cetane number.
kerosene increases its smoke point.
petrol increases its octane number.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
Choose the correct statement regarding thermal cracking.
Moderate changes in operating temperature does not change the depth of cracking.
Increased residence time results in the decreased severity of cracking.
At low pressure, the yield of lighter hydrocarbons are more.
Greater depth of cracking gives lower octane number gasoline.
Answer: Option
Explanation:
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3.
A typical yield of diesel in straight run distillation of crude oil may be about __________ percent.
8
18
28
35
Answer: Option
Explanation:
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4.
Which is almost absent in crude petroleum?
Olefins
Mercaptans
Naphthenes
Cycloparaffins
Answer: Option
Explanation:
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5.
Naphthenic acid is a/an __________ compound.
sulphur
nitrogen
oxygen
none of these
Answer: Option
Explanation:
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