⟩ The yield of straight run LPG from crude oil is about __________ weight percent. A. 20-25 B. 1-1.5 C. 10-15 D. 0.1-0.2
Option B
Option B
Waxy crudes are treated with chemical additives mainly to A. depress its pour point B. dissolve wax C. precipitate wax D. remove wax
Water content in the crude oil as it comes out of oil well may be upto __________ percent. A. 2 B. 5 C. 10 D. 25
Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has A. high pour point and low smoke point. B. low viscosity index. C. high self-ingnition temperature. D. all (a), (b) and.(c).
__________ treatment is done for appreciable improvement in viscosity index of lubricating oil. A. Acid B. Solvent extraction C. Alkali D. Clay
Which of the following factors does not govern the mechanism of petroleum formation from organic sources? A. pH of the soil B. Bacterial action C. Heat D. Pressure
Molecular weight of petrol may be about A. 40-60 B. 100-130 C. 250-300 D. 350-400
__________ chloride present in crude petroleum as impurity is the most prolific producer of HCl during distillation. A. Magnesium B. Potassium C. Calcium D. Sodium
Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute). A. 5-10 B. 30-80 C. 150-250 D. 350-400
Octane number of n-heptane is assumed to be A. 100 B. 0 C. 70 D. ∞
Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute. A. 1 to 5 B. 30 to 80 C. 250 to 350 D. 450 to 500