Chemical Engineering - Petroleum Refinery Engineering

11. 

In hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen

A. enhances the desulphurisation process.
B. minimises coke formation.
C. both (a) and (b).
D. neither (a) nor (b).

Answer: Option C

Explanation:

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12. 

The yield of straight run LPG from crude oil is about __________ weight percent.

A. 20-25
B. 1-1.5
C. 10-15
D. 0.1-0.2

Answer: Option B

Explanation:

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13. 

Deoiling is the process of removal of oil from wax. It is done by the __________ process.

A. solvent extraction
B. sweating
C. resettling
D. all (a), (b) & (c)

Answer: Option D

Explanation:

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14. 

Smoke volatility index is equal to smoke point plus

A. 0.42 x(% distilled at 204°C)
B. 5 mm
C. 0.84 x (% distilled at 204°C)
D. 10 mm. approximately

Answer: Option A

Explanation:

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15. 

Mercaptans are added to liquefied petroleum gas (LPG) to

A. reduce its cost.
B. narrow down its explosion limit.
C. assist in checking its leakage from cylinder.
D. increase its calorific value.

Answer: Option C

Explanation:

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