Chemical Engineering - Petroleum Refinery Engineering

1. 

Presence of aromatics in

A. diesel increases its cetane number.
B. kerosene increases its smoke point.
C. petrol increases its octane number.
D. all (a), (b) and (c).

Answer: Option C

Explanation:

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2. 

Choose the correct statement regarding thermal cracking.

A. Moderate changes in operating temperature does not change the depth of cracking.
B. Increased residence time results in the decreased severity of cracking.
C. At low pressure, the yield of lighter hydrocarbons are more.
D. Greater depth of cracking gives lower octane number gasoline.

Answer: Option D

Explanation:

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3. 

A typical yield of diesel in straight run distillation of crude oil may be about __________ percent.

A. 8
B. 18
C. 28
D. 35

Answer: Option A

Explanation:

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4. 

Which is almost absent in crude petroleum?

A. Olefins
B. Mercaptans
C. Naphthenes
D. Cycloparaffins

Answer: Option B

Explanation:

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5. 

Naphthenic acid is a/an __________ compound.

A. sulphur
B. nitrogen
C. oxygen
D. none of these

Answer: Option C

Explanation:

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