Petroleum Refinery Engineering Pressure & temperature maintained in catalytic cracking is about 10atm & 500°C 50atm. & 750°C 30atm & 200°C 2atm & 500°C 10atm & 500°C 50atm. & 750°C 30atm & 200°C 2atm & 500°C ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Tetra-ethyl lead is added in gasoline to Reduce the pour point Increase its smoke point Increase its octane number Reduce gum formation Reduce the pour point Increase its smoke point Increase its octane number Reduce gum formation ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) __________ with increase in the amount of water. Increases Remains unchanged Decreases Decreases linearly Increases Remains unchanged Decreases Decreases linearly 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 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 Reduce gum content in gasoline Suppress coke formation Increase the yield of light distillates ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Which of the following is not a sulphur compound present in petroleum ? Mercaptans Thiophenes Sulphones Pyroles Mercaptans Thiophenes Sulphones Pyroles ANSWER DOWNLOAD EXAMIANS APP
Petroleum Refinery Engineering Which is almost absent in crude petroleum? Olefins Mercaptans Cycloparaffins Naphthenes Olefins Mercaptans Cycloparaffins Naphthenes ANSWER DOWNLOAD EXAMIANS APP
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