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 Discoloration Coking Gum formation Thermal cracking Discoloration Coking Gum formation Thermal cracking ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene. Smoking tendency of hydrocarbons increases in the order : paraffins → isoparaffins → naphthenes → aromatics 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 paraffins increases with decrease in its molecular weight Smoking tendency of hydrocarbons increases in the order : paraffins → isoparaffins → naphthenes → aromatics 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 paraffins increases with decrease in its molecular weight ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Higher viscosity of lubricating oil usually signifies Higher flash point and fire point Higher acid number Lower Reid vapour pressure Lower flash point and fire point Higher flash point and fire point Higher acid number Lower Reid vapour pressure Lower flash point and fire point ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Asphalts are All of these Readily oxidisable and form carbonaceous sludge . Low molecular weight & low boiling point compounds present in petroleum Desirable in catalytic cracking feedstock, because they produce coke All of these Readily oxidisable and form carbonaceous sludge . Low molecular weight & low boiling point compounds present in petroleum Desirable in catalytic cracking feedstock, because they produce coke ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering The order of preference for feedstock to a catalytic reformer is Coking naphtha - virgin naphtha - catalytic naphtha Catalytic naphtha - coking naphtha - virgin naphtha Virgin naphtha - coking naphtha - catalytic naphtha Virgin naphtha - catalytic naphtha - coking naphtha Coking naphtha - virgin naphtha - catalytic naphtha Catalytic naphtha - coking naphtha - virgin naphtha Virgin naphtha - coking naphtha - catalytic naphtha Virgin naphtha - catalytic naphtha - coking naphtha ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Higher vapour pressure of gasoline indicates High breathing loss Both A & B Low flash point Neither A nor B High breathing loss Both A & B Low flash point Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
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