Chemical Engineering - Petroleum Refinery Engineering

16. 

Liquefied Petroleum Gas (LPG) in domestic use cylinders is in the liquid form. The density of LPG in liquid form is about __________ of that of water (i.e. 1 gm/c.c).

A. one fourth
B. one third
C. half
D. one eighth

Answer: Option C

Explanation:

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17. 

Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about __________ ppm.

A. 1
B. 50
C. 5000
D. 10000

Answer: Option B

Explanation:

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18. 

CnH2n is the general formula for

A. olefins
B. naphthenes
C. both (a) and (b)
D. neither (a) nor (b)

Answer: Option C

Explanation:

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19. 

Natural gas recovered along with crude oil from oil wells is called wet natural gas which has a higher __________ compared to the dry natural gas.

A. unsaturated hydrocarbon content
B. calorific value
C. quantity of propane
D. quantity of butane

Answer: Option B

Explanation:

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20. 

Pick out the wrong statement.

A. Alkylation produces a larger iso-paraf-fin (having higher octane number) from the reaction of an olefin with smaller iso-paraffin.
B. Catalytic alkylation processes use HF, AlCl3 & H2SO4 as Catalysts.
C. All the alkylation processes use very high temperature (> 1000°C).
D. Gasoline having an octane number of 90 can be produced by alkylation process.

Answer: Option C

Explanation:

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