Chemical Engineering - Petroleum Refinery Engineering

26. 

Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is

A. more than 100
B. round about 100
C. between 50 and 100
D. less than 25

Answer: Option A

Explanation:

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27. 

Pressure & temperature maintained in catalytic cracking is about

A. 2atm & 500°C
B. 10atm & 500°C
C. 30atm & 200°C
D. 50atm. & 750°C

Answer: Option A

Explanation:

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28. 

Pick out the wrong statement.

A. Pensky-Marten apparatus is used for determining flash points above 50°C.
B. Characterisation factor of paraffinic crude oil is more than 12.
C. Abel apparatus is used for determining flash points below 50°C.
D. An oil having high susceptibility to change in viscosity with temperature changes, has a high viscosity index.

Answer: Option D

Explanation:

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29. 

Char value of Kerosene is the amount of charred oil deposition on the wick obtained after burning it in a standard wick lamp at a standard rate for 24 hours. Char value of a good quality kerosene should be less than __________ mg/kg of kerosene.

A. 1
B. 20
C. 100
D. 500

Answer: Option B

Explanation:

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30. 

Highest quality bitumen is produced from the __________ crude oil.

A. paraffinic
B. naphthenic
C. intermediate
D. mixed

Answer: Option B

Explanation:

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