1) 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
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2) The characterisation factor of crude petroleum oil is around__________________? a. 3 b. 11 c. 22 d. 28
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3) Molecular weight of crude petroleum may be around________________? a. 50 b. 250 c. 1500 d. 5000
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4) Octane number (unleaded) of gasoline produced by isomerisation of butane may be about __________________? a. 45 b. 55 c. 70 d. 90
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5) Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its_________________? a. Molecular weight b. Aromatics content c. Both A. & B. d. Neither ‘a’ nor ‘b’
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6) ‘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
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7) Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic____________________? a. Cracking b. Polymerisation c. Reforming d. Isomerisation
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8) Which is almost absent in crude petroleum ? a. Olefins b. Mercaptans c. Naphthenes d. Cycloparaffins
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9) Hydrocracking employs ___________________? a. High pressure & temperature b. Low pressure & temperature c. High pressure and low temperature d. High temperature and low pressure
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10) Which of the following is a Naphthene ? a. Butene b. Butadiene c. Cyclohexane d. Acetylene
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11) Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about _______________ °C ? a. 50 b. 70 c. 90 d. 140
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12) Which of the following has the highest flash point of all ? a. Diesel b. Kerosene c. Petrol d. Furnace oil
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13) Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl isobutyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the____________________? a. Elimination of solvent drying facility b. Higher nitration temperature c. Lower solvent dilution ratio d. All A., B. & C.
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14) Smoke point of a good burning kerosene may be around _______________ mm? a. 0-5 b. 20-25 c. 60-75 d. 100-120
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15) Gum formation in stored gasoline is mainly due to the ____________________? a. Alkylation of unsaturated b. Presence of sulphur c. Oxidation & polymerisation of unsaturated d. Higher aromatic content
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16) 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
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17) Naphthenic acid is a/an ______________ compound? a. Sulphur b. Nitrogen c. Oxygen d. None of these
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18) Flash point of diesel/kerosene (>50°C) is determined by the_______________? a. Abel apparatus b. Pensky-Martens apparatus c. Saybolt chromometer d. None of these
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19) Which of the following is desirable in diesel and kerosene but is undesirable in gasoline ? a. Aromatics b. Mercaptans c. Paraffins d. Naphthenic acid
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20) Cetane number of alpha methyl naphthalene is assumed to be_________________? a. 0 b. 100 c. 50 d. ∞
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