Question 21 : Phenols are added in gasoline to
1. reduce its viscosity.
2. improve the octane number.
3. increase its pour point.
4. act as an antioxidant.
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Question 22 : Which of the following is desirable in diesel and kerosene but is undersirable in gasoline ?
1. Mercaptans
2. Aromatics
3. Naphthenic acid
4. Paraffins
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Question 23 : Name the hydrocarbon having the poorest oxidation stability.
1. olefin
2. paraffin
3. aromatics
4. naphthene
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Question 24 : The first crude oil refinery of India is located at
1. Madras
2. Naharkatiya
3. Kochin
4. Digboi
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Question 25 : Olefins are
1. unsaturated cyclic compounds (hydrocarbons).
2. saturated hydrocarbons.
3. present in substantially good quantity in crude petroleum.
4. none of these.
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Question 26 : Testing of the knocking characteristics of petrofuels is done in a __________ engine.
1. Carnot
2. CFR (Co-operative fuel research)
3. diesel
4. Stirling
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Question 27 : Octane number of gasoline produced by two stage fluidised catalytic cracking process is
1. 80
2. 92
3. 87
4. 97
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Question 28 : Feedstock for the production of biodiesel is
1. used vegetable oils
2. LSHS
3. herbal plants
4. bagasse
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Question 29 : The proper arrangement of the petroleum fractions in order of their boiling points is
1. lubricating oil > diesel > petrol > LPG
2. petrol > lubricating oil > diesel > LPG
3. petrol > diesel > LPG > lubricating oil
4. lubricating oil > petrol > diesel > LPG
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Question 30 : Pick out the wrong statement.
1. Iso-paraffin crack faster than n-paraf-fin.
2. Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic.
3. None of these.
4. Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking.
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