141⟩ Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke? A. Naphtha B. Vacuum residue C. Light gas oil D. Diesel
Option B
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142⟩ Feed for reforming is generally A. naphtha or straight run gasoline. B. reduced crude. C. vacuum gas oil. D. atmospheric gas oil.
Option A
143⟩ 1 centistoke is equal to __________ Redwood I seconds. A. 1 B. 4.08 C. 0.408 D. 40.8
Option B
144⟩ Which of the following gasolines (unleaded) has the least octane number? A. Catalytically cracked gasoline B. Straight run gasoline C. Catalytically reformed gasoline D. Polymer gasoline
Option B
145⟩ Which of the following is the most important property for a jet fuel? A. Cloud point B. Pour point C. Colour D. Freezing point
Option D
146⟩ Which parameter is used for the grading of paraffin waxes? A. Specific gravity B. Melting point C. Viscosity D. Penetration number
Option C
147⟩ Gasoline yield in catalytic reforming of naphtha may be about __________ percent by weight. A. 85 B. 65 C. 50 D. 98
Option A
148⟩ Which of the following has the minimum °API gravity of all? A. Diesel B. Kerosene C. Petrol D. Furnace oil
Option D
149⟩ Higher pressure in the reforming reactor A. increases coke formation. B. increases the rate of reaction. C. produces high octane number gasoline. D. none of these.
Option D
150⟩ The main reaction in reforming is the A. dehydrogenation of naphthenes. B. hydrogenation of naphthenes. C. hydrocracking of paraffins. D. saturation of olefins.
Option A
151⟩ Carbon percentage (by weight) in crude petroleum may be about A. 65 B. 75 C. 85 D. 95
Option C
152⟩ Lane and Garton classification of petroleum is based on its A. composition B. specific gravity C. optical properties D. viscosity
Option B
153⟩ With increase in the molecular weight of aromatic present in kerosene, its smoking tendency A. increases B. decreases C. remains same D. is unpredictable
Option A
154⟩ Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________ ptb (pounds per thousand barrel). A. 0.03 B. 3 C. 35 D. 70
Option B
155⟩ Clay treatment is used to remove A. salt from the crude oil. B. colour & dissolved gases from cracked gasoline. C. wax from lube oil. D. none of these.
Option C
156⟩ Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is A. more than 100 B. round about 100 C. between 50 and 100 D. less than 25
Option A
157⟩ Pressure & temperature maintained in catalytic cracking is about A. 2atm & 500°C B. 10atm & 500°C C. 30atm & 200°C D. 50atm. & 750°C
Option A
158⟩ Pick out the wrong statement. A. Pensky-Marten apparatus is used for determining flash points above 50°C. B. Characterisation factor of paraffinic crude oil is more than 12. C. Abel apparatus is used for determining flash points below 50°C. D. An oil having high susceptibility to change in viscosity with temperature changes, has a high viscosity index.
Option D
159⟩ Water separometer index (modified) (WSIM) of a petrofuel is the measure of its A. emulsification tendency. B. water separation characteristics. C. water content. D. water absorbing capacity from atmosphere.
Option B
160⟩ Highest quality bitumen is produced from the __________ crude oil. A. paraffinic B. naphthenic C. intermediate D. mixed
Option B
