⟩ Deoiling is the process of removal of oil from wax. It is done by the __________ process. A. solvent extraction B. sweating C. resettling D. all (a), (b) & (c)
Option D
Option D
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
Liquefied Petroleum Gas (LPG) is mainly a mixture of A. propane & butane B. methane & ethane C. high boiling olefins D. high boiling naphthenes
Concentration of H2SO4 catalyst in alkyla-tion is kept between 90-98%, because H2SO4 having concentration A. less than 90% promotes polymerisation. B. more than 98% promotes cracking. C. both (a) and (b). D. neither (a) nor (b).