Chemical Engineering - Petroleum Refinery Engineering

36. 

Mercaptans are

A. low boiling sulphur compounds.
B. added in LPG cylinders to detect gas leakage by its smell.
C. undesirable in petrol, as they reduce its octane number.
D. all (a), (b) and (c)

Answer: Option D

Explanation:

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37. 

Paraffin base crude oil as compared to asphalt base crude gives

A. higher yield of straight run gasoline.
B. higher octane number gasoline.
C. lower viscosity index lube oil.
D. poorer yield of lube oil.

Answer: Option A

Explanation:

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38. 

True boiling point apparatus is used for the

A. determination of characterisation factor.
B. evaluation of oil stocks.
C. determination of true vapour pressure.
D. none of these.

Answer: Option B

Explanation:

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39. 

In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones.

A. sulphur increases
B. sulphur decreases
C. nitrogen decreases
D. none of these

Answer: Option A

Explanation:

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40. 

Catalytic desulphurisation process used for sweetening of straight run gasoline and kerosene uses __________ as catalyst.

A. bauxite
B. fuller's earth
C. activated clay
D. all (a), (b) & (c)

Answer: Option D

Explanation:

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