Question 61 : Visbreaking process is used mainly for making
1. smoke free kerosene
2. fuel oil
3. high octane gasoline
4. high cetane diesel
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Question 62 : Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol.
1. mercaptans
2. asphalt
3. waxes
4. diolefins
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Question 63 : Crude oil is pumped by a __________ pump.
1. screw
2. gear
3. centrifugal
4. reciprocating
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Question 64 : A good lubricant should have high
1. volatility
2. viscosity index
3. none of these
4. pour point
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Question 65 : Solvent used in the deasphalting process is
1. furfurol
2. hexane
3. propane
4. phenol
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Question 66 : Casing head gasoline is the liquid
1. butane
2. natural gas.
3. propane
4. gasoline separated from wet natural gas by compression.
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Question 67 : Viscosity index of a lubricating oil
1. is the measure of variation of viscosity with temperature.
2. none of these.
3. is the measure of its flash point.
4. should be low.
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Question 68 : Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater.
1. none of these
2. pipestill
3. electric immersion
4. steam coil
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Question 69 : Which is the most undesirable component in kerosene ?
1. n-paraffins
2. i-paraffins
3. Naphthenes
4. Aromatics
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Question 70 : Pour point and freezing point is equal for
1. diesel
2. petrol
3. water
4. crude petroleum
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