Related Questions

Which of the following is used as a solvent in deasphalting of petroleum products?
A Furfural
B Propane
C Methyl ethyl ketone
D Liquid sulphur dioxide
Solvent used in the deasphalting process is
A Furfurol
B Phenol
C Propane
D Hexane
Road grade bitumen is produced from vacuum residue by its
A Aeration
B Pyrolysis
C Hydrogenation
D Steam reforming
Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil
A Gives higher yield of petrol
B Lower octane number of petrol
C Higher sulphur content in the product
D Higher gum forming material in petrol
Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of
A Thermal cracking
B Gum formation
C Coking
D Discoloration
In most of the vacuum crystalliser, vacuum is generally produced by means of a
A Suction pump
B Compressed air jet
C Steam jet ejector with a barometric condenser
D None of these
The ratio of the actual vacuum to the ideal vacuum in a condenser is called
A Condenser efficiency
B Vacuum efficiency
C Nozzle efficiency
D Boiler efficiency
Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter.
A Filtering
B Washing
C Drying
D All of the above
Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.
A 1 to 5
B 30 to 80
C 250 to 350
D 450 to 500
The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg.
A 1.2
B 12
C 120
D 700

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