81⟩ True vapour pressure of a petroleum fraction __________ Reid vapour pressure. A. is less than B. is more than C. is same as D. may be either more or less than
Option D
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82⟩ The main purpose of recycling the byproduct hydrogen gas in the reformer reactor is to A. obviate catalyst poisoning. B. maintain the reaction temperature. C. sustain the reactor pressure. D. hydrogenate the feed stock.
Option C
83⟩ Increase in the specific gravity of petroleum products indicates A. decrease in paraffin content. B. increase in thermal energy per unit weight. C. increase in aromatic content. D. higher H/C ratio.
Option A
84⟩ 'Solvent naphtha' used mostly as a solvent in paints and perfumery is produced by the __________ of virgin naphtha into small boiling range cuts. A. steam reforming B. distillation C. desulphurisation D. none of these
Option B
85⟩ Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with A. methyl alcohol B. ethyl alcohol C. methane D. ethane
Option A
86⟩ The main aim of cracking is to produce A. gasoline B. lube oil C. petrolatum D. coke
Option A
87⟩ LPG when brought to atmospheric pressure & temperature will be a A. liquid lighter than water. B. liquid heavier than water. C. gas lighter than air. D. gas heavier than air.
Option D
88⟩ The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol. A. 3 B. 300 C. 3000 D. 1000
Option A
89⟩ Naphthenic acid is a/an __________ compound. A. sulphur B. nitrogen C. oxygen D. none of these
Option C
90⟩ Glycol added to petrol acts as a/an __________ agent. A. anti-knocking B. anti-icing C. anti-gum forming D. dewaxing
Option B
91⟩ 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 A. increase the yield of light distillates. B. suppress coke formation. C. enhance the octane number of gasoline. D. reduce gum content in gasoline.
Option B
92⟩ Pick out the wrong statement. A. Higher specific gravity of petroleum products means higher C/H ratio. B. Aromatics have lower specific gravity than corresponding paraffins. C. Hydrocarbons of low specific gravity (e.g, paraffins) possess the maximum thermal energy per unit volume. D. Hydrocarbons of high specific gravity (eg, aromatics) possess the maximum thermal energy per unit weight.
Option B
93⟩ Octane number of gasoline produced by two stage fluidised catalytic cracking process is A. 80 B. 87 C. 92 D. 97
Option D
94⟩ The proper arrangement of the petroleum fractions in order of their boiling points is A. lubricating oil > diesel > petrol > LPG B. lubricating oil > petrol > diesel > LPG C. petrol > lubricating oil > diesel > LPG D. petrol > diesel > LPG > lubricating oil
Option A
95⟩ Pick out the wrong statement. A. Iso-paraffin crack faster than n-paraf-fin. B. Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic. C. Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking. D. None of these.
Option B
96⟩ Feedstock for the production of biodiesel is A. herbal plants B. used vegetable oils C. LSHS D. bagasse
Option B
97⟩ Which one is used to determine the colour of petroleum products? A. Colour comparator B. Saybolt chromometer C. Cleveland apparatus D. None of these
Option A
98⟩ Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil A. gives higher yield of petrol. B. lower octane number of petrol. C. higher sulphur content in the product. D. higher gum forming material in petrol.
Option A
99⟩ Phenols are added in gasoline to A. improve the octane number. B. act as an antioxidant. C. reduce its viscosity. D. increase its pour point.
Option B
100⟩ Which of the following is desirable in diesel and kerosene but is undersirable in gasoline? A. Aromatics B. Mercaptans C. Paraffins D. Naphthenic acid
Option A
