Question 11 : Sulphur content in lighter and heavier petroleum products is generally determined respectively by
1. lamp method and bomb method.
2. bomb method and lamp method.
3. bomb method and quartz tube method.
4. quartz tube method and lamp method.
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Question 12 : Molecular weight of crude petroleum may be around
1. 1500
2. 250
3. 50
4. 5000
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Question 13 : Petrolatum is
1. a mixture of microcrystalline wax in viscous hydrocarbon liquids.
2. same as petroleum ether.
3. petroleum coke.
4. none of these.
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Question 14 : An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating.
1. 40
2. 15
3. 5
4. 60
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Question 15 : Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms.
1. 5 to 5
2. 15-20
3. 0.1 to 0.5
4. 7.5 to 15
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Question 16 : Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about __________ °C.
1. 140
2. 50
3. 70
4. 90
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Question 17 : The average boiling point of aviation turbine fuel is closest to that of
1. lubricating oils
2. LPG
3. Kerosene
4. diesel
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Question 18 : Mercaptans is represented as (where R and R' are alkyl groups)
1. R-S-R'
2. R-S-R
3. R-COOH
4. R-S-H
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Question 19 : The most widely used crude topping column in refineries is the __________ column.
1. bubble-cap
2. packed bed
3. fluidised bed
4. perforated plate
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Question 20 : Crude oil is transported inland from oil field to refineries, mainly by the
1. rail tankers
2. underground pipelines
3. road tankers
4. none of these
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