181⟩ Which of the following processes in oil refinery does not employ 'cracking'? A. Coking B. Visbreaking C. Pyrolysis D. None of these
Option D
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340 Petroleum Engineering Questions And Answers
182⟩ Aniline point test of an oil qualitatively indicates the __________ content of an oil. A. paraffin B. olefin C. aromatic D. naphthene
Option C
183⟩ Which of the following has the highest gum forming tendency in gosoline? A. Paraffins B. Diolefins C. Aromatics D. Naphthenes
Option B
184⟩ Bottom product of atmospheric pressure crude oil distillation column is termed as A. reduced crude B. heavy ends C. asphalt D. residuum
Option A
185⟩ The most important property for a jet fuel is its A. viscosity B. freezing point C. calorific value D. flash point
Option B
186⟩ Higher viscosity of lubricating oil usually signifies A. lower Reid vapour pressure. B. higher acid number. C. higher flash point and fire point. D. lower flash point and fire point.
Option C
187⟩ The reservoir rock containing petroleum has A. low porosity B. high permeability C. high porosity D. both (b) and (c)
Option D
188⟩ Penetration test determines the __________ of the grease. A. stiffness B. lubricating properties (e.g. oilness) C. service temperature D. variation in viscosity with temperature
Option A
189⟩ Cetane number of high speed diesel must be ≥ A. 30 B. 45 C. 75 D. 95
Option B
190⟩ LSHS is a type of furnace oil, which A. is more viscous than high viscosity furnace oil (HVFO). B. stands for low sulphur heavy stock. C. is an ideal fuel for metallurgical furnaces due to its lower sulphur content (< 1%). D. all (a), (b) and (c).
Option D
191⟩ Hydro-fining is the most recent and effective method for the A. removal of sulphur. B. improvement of smoke point. C. reduction of breathing loss. D. improvement of viscosity index.
Option A
192⟩ Fuel oil is subjected to visbreaking to reduce its A. pour point B. viscosity C. pressure drop on pumping D. all (a), (b) and (c)
Option D
193⟩ Which is the most desirable component of a good quality kerosene? A. i-paraffins B. Aromatics C. n-paraffins D. Naphthenes
Option C
194⟩ In hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen A. enhances the desulphurisation process. B. minimises coke formation. C. both (a) and (b). D. neither (a) nor (b).
Option C
195⟩ 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
196⟩ Smoke volatility index is equal to smoke point plus A. 0.42 x(% distilled at 204°C) B. 5 mm C. 0.84 x (% distilled at 204°C) D. 10 mm. approximately
Option A
197⟩ 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
198⟩ Waxes present in petroleum products A. can be separated out by distillation. B. are not soluble in them. C. crystallise out at low temperature. D. decrease their viscosity.
Option C
199⟩ Mercaptans are added to liquefied petroleum gas (LPG) to A. reduce its cost. B. narrow down its explosion limit. C. assist in checking its leakage from cylinder. D. increase its calorific value.
Option C
200⟩ Absolute vapor pressure of petrofuels is found by Reid bomb which is heated in water bath to 100°F. In Reid apparatus, the ratio of the volume of air chamber to that of the liquid fuel chamber is A. 1 B. 2 C. 3 D. 4
Option D
