Petroleum Refinery Engineering Choose the correct statement regarding thermal 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 Greater depth of cracking gives lower octane number gasoline Moderate changes in operating temperature does not change the depth of cracking ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Which of the following is an additive used for improving the cetane number of diesel? Ethyl nitrate or acetone Tetramethyllead None of these Tetraethyl lead Ethyl nitrate or acetone Tetramethyllead None of these Tetraethyl lead ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Visbreaking Uses natural gas as feed Is carried out at atmospheric pressure Produces gasoline only Produces fuel oil of lower viscosity Uses natural gas as feed Is carried out at atmospheric pressure Produces gasoline only Produces fuel oil of lower viscosity ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Most widely used solvent for dewaxing is Naphtha Sodium plumbite Methyl-ethyl-ketone (MEK) Petroleum ether Naphtha Sodium plumbite Methyl-ethyl-ketone (MEK) Petroleum ether ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Which of the following is the easiest to crack? Naphthenes Aromatics Olefins Paraffins Naphthenes Aromatics Olefins Paraffins ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering In catalytic alkylation, higher iso-butane to olefin ratio gives Higher yield Neither A nor B Low final boiling point product Both A & B Higher yield Neither A nor B Low final boiling point product Both A & B ANSWER DOWNLOAD EXAMIANS APP
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