Chemical Engineering - Petroleum Refinery Engineering

21. 

H/C ratio (by weight) for the same number of carbon atoms is the highest in case of

A. aromatics
B. paraffins
C. olefins
D. naphthenes

Answer: Option D

Explanation:

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22. 

Which of the following theories of origin of petroleum does not explain the presence of nitrogen & sulphur compounds in crude oil?

A. Modern theory
B. Carbide theory
C. Engler theory
D. all (a), (b) and (c)

Answer: Option B

Explanation:

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23. 

Higher vapour pressure of gasoline indicates

A. low flash point
B. high breathing loss
C. both (a) and (b)
D. neither (a) nor (b)

Answer: Option D

Explanation:

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24. 

Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octance is chemically known as

A. α-methyl naphthalene.
B. 2-2-4 tri methyl pentane.
C. 1, 3 butadiene.
D. tetra methyl ethylene.

Answer: Option B

Explanation:

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25. 

Pour point of a petrofuel is

A. multiple of 3°F.
B. multiple of 5°F.
C. 5°C below the temperature at which oil ceases to flow.
D. none of these.

Answer: Option C

Explanation:

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