Petroleum Refinery Engineering Crude oil is subjected to vacuum distillation in the last stage, because None of these Lighter/low boiling products are prone to thermal decomposition High purity products can be obtained thereby High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose None of these Lighter/low boiling products are prone to thermal decomposition High purity products can be obtained thereby High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Aromatics have the highes __________ of all the hydrocarbons of same carbon atoms. Viscosity Octane number Cetane number Smoke point Viscosity Octane number Cetane number Smoke point 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 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 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 ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Detergent is added as an additive in engine lubricating oil to Increase oxidation stability Keep contaminants in suspension Prevent rusting Reduce deposit formation Increase oxidation stability Keep contaminants in suspension Prevent rusting Reduce deposit formation 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 Suppress coke formation Reduce gum content in gasoline Enhance the octane number of gasoline Increase the yield of light distillates Suppress coke formation Reduce gum content in gasoline Enhance the octane number of gasoline Increase the yield of light distillates ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Crude topping column operates at __________ pressure. 10 atm Atmospheric Vacuum 3 atm 10 atm Atmospheric Vacuum 3 atm ANSWER DOWNLOAD EXAMIANS APP
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