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Petroleum Refinery Engineering

Petroleum Refinery Engineering
Hydrogen percentage (by weight) in crude petroleum may be about

5
25
15
35

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Petroleum Refinery Engineering
Which of the following is not a sulphur compound present in petroleum ?

Thiophenes
Mercaptans
Sulphones
Pyroles

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Petroleum Refinery Engineering
Feedstock for the production of biodiesel is

LSHS
Used vegetable oils
Bagasse
Herbal plants

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Petroleum Refinery Engineering
Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm² is maintained during cracking mainly to

Increase the yield of light distillates
Enhance the octane number of gasoline
Reduce gum content in gasoline
Suppress coke formation

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Petroleum Refinery Engineering
Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of

Gum formation
Thermal cracking
Coking
Discoloration

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Petroleum Refinery Engineering
Crude oil produced by Indian oil fields are predominantly __________ in nature.

Asphaltic
Mixed base
Naphthenic
Paraffinic

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