Petroleum Refinery Engineering Choose the correct statement regarding thermal cracking. Greater depth of cracking gives lower octane number gasoline Moderate changes in operating temperature does not change the depth of cracking At low pressure, the yield of lighter hydrocarbons are more Increased residence time results in the decreased severity of cracking Greater depth of cracking gives lower octane number gasoline Moderate changes in operating temperature does not change the depth of cracking At low pressure, the yield of lighter hydrocarbons are more Increased residence time results in the decreased severity of cracking ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction Light ends Residues Intermediate distillates Heavy distillates Light ends Residues Intermediate distillates Heavy distillates ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Butadiene is a/an Di-olefin Naphthene Olefin Aromatic Di-olefin Naphthene Olefin Aromatic ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Which of the following is desirable in diesel and kerosene but is undersirable in gasoline? Mercaptans Naphthenic acid Aromatics Paraffins Mercaptans Naphthenic acid Aromatics Paraffins ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Hydrogen content in petroleum products varies from 12 to 15% (by weight). As a result the difference between gross and net heating value of petroleum fuels varies in the range of __________ kcal/kg. 600-750 250-350 1000-1500 2000-2500 600-750 250-350 1000-1500 2000-2500 ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Gum formation in stored gasoline is mainly due to the Presence of sulphur Alkylation of unsaturates Oxidation & polymerisation of unsaturates Higher aromatic content Presence of sulphur Alkylation of unsaturates Oxidation & polymerisation of unsaturates Higher aromatic content ANSWER DOWNLOAD EXAMIANS APP
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