Petroleum Refinery Engineering Mercaptans are added to liquefied petroleum gas (LPG) to Narrow down its explosion limit Assist in checking its leakage from cylinder Reduce its cost Increase its calorific value Narrow down its explosion limit Assist in checking its leakage from cylinder Reduce its cost Increase its calorific value ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol. Asphalt Mercaptans Diolefins Waxes Asphalt Mercaptans Diolefins Waxes ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Which of the following reactions is undesirable in the production of catalytically reformed gasoline? Dehydrogenation of lower paraffins Dehydrogenation of naphthene Isomerisation of paraffins Dehydrocyclisation of higher paraffins Dehydrogenation of lower paraffins Dehydrogenation of naphthene Isomerisation of paraffins Dehydrocyclisation of higher paraffins ANSWER DOWNLOAD EXAMIANS APP
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 Reduce gum content in gasoline Suppress coke formation Increase the yield of light distillates Enhance the octane number of gasoline Reduce gum content in gasoline Suppress coke formation Increase the yield of light distillates Enhance the octane number of gasoline ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Isomerisation converts the __________ tot-paraffins. None of these Paraffins Olefins Naphthenes None of these Paraffins Olefins Naphthenes ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Pick out the correct statement about catalytic polymerisation. H₂SO₄ polymerisation process gives gasoline rich in unsaturates Both A & B Neither A nor B In H₂SO₄ polymerisation, H₃PO₄ is always used with 2% steam to prevent meta & ortho H₃PO₄ formation, which are inactive H₂SO₄ polymerisation process gives gasoline rich in unsaturates Both A & B Neither A nor B In H₂SO₄ polymerisation, H₃PO₄ is always used with 2% steam to prevent meta & ortho H₃PO₄ formation, which are inactive ANSWER DOWNLOAD EXAMIANS APP
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