Question 41 : Furfural solvent extraction is used for upgrading (by dissolving aromatics)
1. wax
2. lubricating oils
3. naphtha
4. cracking feedstock
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Question 42 : The colour of gasoline is an indication of its
1. octane number.
2. lead susceptibility.
3. none of these.
4. gum forming tendency & thoroughness of refining.
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Question 43 : The octane number of aviation gasoline may be
1. 87
2. 97
3. 79
4. >100
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Question 44 : __________ converts n-paraffins to i-paraffins.
1. Isomerisation
2. Alkylation
3. none of these
4. Polymerisation
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Question 45 : In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones.
1. sulphur increases
2. sulphur decreases
3. nitrogen decreases
4. none of these
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Question 46 : Flash point of motor gasoline may be around __________ °C.
1. 10
2. 100
3. 45
4. 150
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Question 47 : Solution used in Doctor's treatment for the removal of mercaptans is
1. sodium plumbite
2. sodium hydroxide
3. cupric chloride
4. potassium isobutyrate
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Question 48 : True boiling point apparatus is used for the
1. determination of characterisation factor.
2. determination of true vapour pressure.
3. evaluation of oil stocks.
4. none of these.
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Question 49 : Paraffin base crude oil as compared to asphalt base crude gives
1. lower viscosity index lube oil.
2. higher yield of straight run gasoline.
3. higher octane number gasoline.
4. poorer yield of lube oil.
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Question 50 : Octane number of gasoline is a measure of its
1. knocking tendency.
2. ignition temperature.
3. ignition delay.
4. smoke point.
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