Petroleum Refinery Engineering
Breathing loss on storage of gasoline occurs due to the

Presence of unsaturated air
Fluctuation of ambient temperature during day and night
Both A & B
Neither A nor B

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Petroleum Refinery Engineering
The order of preference for feedstock to a catalytic reformer is

Virgin naphtha - coking naphtha - catalytic naphtha
Coking naphtha - virgin naphtha - catalytic naphtha
Catalytic naphtha - coking naphtha - virgin naphtha
Virgin naphtha - catalytic naphtha - coking naphtha

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Petroleum Refinery Engineering
Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene.

Smoking tendency of aromatics decreases with increase in its molecular weight
Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond
Smoking tendency of hydrocarbons increases in the order : paraffins → isoparaffins → naphthenes → aromatics
Smoking tendency of paraffins increases with decrease in its molecular weight

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