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1) 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
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2) 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
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3) Cetane number of a diesel fuel is the measure of its____________________? a. Ignition delay b. Smoke point c. Viscosity d. Oxidation stability
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4) Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octane is chemically known as ___________________? a. α-methyl naphthalene b. 2-2-4 tri methyl pentane c. 1, 3 butadiene d. Tetra methyl ethylene
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5) Products drawn from the top to bottom of the crude oil distillation column has progressively increasing ___________________? a. Boiling points b. Molecular weight c. C/H ratio d. All A., B. and C.
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6) Road grade bitumen is produced from vacuum residue by its ____________________? a. Aeration b. Pyrolysis c. Hydrogenation d. Steam reforming
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7) Lane and Garton classification of petroleum is based on its ____________________? a. Composition b. Specific gravity c. Optical properties d. Viscosity
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8) Aromatics have the highest ________________ of all the hydrocarbons of same carbon atoms? a. Smoke point b. Octane number c. Cetane number d. Viscosity
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9) Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is _______________ centistokes (or 100 Redwood I seconds) ? a. 5 b. 25 c. 50 d. 100
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10) 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
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11) Which of the following is desirable in petrol (gasoline) but undesirable in kerosene ? a. Paraffins b. Aromatics c. Mercaptans d. Naphthenic acid
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12) 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-ignition temperature d. All A., B. and C.
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13) Which of the following is a non-regenerative fixed bed catalytic reforming process ? a. Hydroforming b. Thermofor catalytic reforming c. Platforming d. Hyperforming
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14) With increase in the molecular weight of aromatic present in kerosene, its smoking tendency ? a. Increases b. Decreases c. Remain same d. Is unpredictable
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15) Platforming is a ____________ process? a. Moving bed b. Fluidised bed c. Non-regenerative & fixed bed d. Regenerative
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16) Paraffins are desirable in lubricating oil, as it has got high_____________________? a. Viscosity b. Viscosity index c. Smoke point d. Pour point
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17) 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
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18) Extractor temperature is maintained at -20°C in Edeleanu process to reduce the _________________ of kerosene? a. Smoke point b. Paraffins c. Aromatics d. Naphthenes
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19) 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
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20) The general formula of naphthenes is___________________? a. CnH2n + 2 b. CnH2n-6 (where, n ≥ 6) c. CnHn-4 d. Same as that for olefins i.e. CnH2n
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