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 Increase the yield of light distillates Enhance the octane number of gasoline Suppress coke formation Reduce gum content in gasoline Increase the yield of light distillates Enhance the octane number of gasoline ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil Lower octane number of petrol Higher sulphur content in the product Gives higher yield of petrol Higher gum forming material in petrol Lower octane number of petrol Higher sulphur content in the product Gives higher yield of petrol Higher gum forming material in petrol ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering In hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen Neither A nor B Minimises coke formation Both A & B Enhances the desulphurisation process Neither A nor B Minimises coke formation Both A & B Enhances the desulphurisation process ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute. 30 to 80 250 to 350 1 to 5 450 to 500 30 to 80 250 to 350 1 to 5 450 to 500 ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Which of the following has the highest viscosity of all (at a given temperature)? Fuel oil Petrol Light diesel oil Naphtha Fuel oil Petrol Light diesel oil Naphtha ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Which is the most undesirable component in kerosene? I-paraffins Aromatics Naphthenes N-paraffins I-paraffins Aromatics Naphthenes N-paraffins ANSWER DOWNLOAD EXAMIANS APP
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