Related Questions

In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction
A Heavy distillates
B Intermediate distillates
C Light ends
D Residues
Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).
A 5-10
B 30-80
C 150-250
D 350-400
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
After the increase of price of oil by 40%, a family decided to reduce its oil consumption so that the expenditure for oil goes up by 26% only. If the total consumption of oil before the price rise was 10 kg per month, then what is the current consumption of oil per month (in kg)?
A 8
B 8.50
C 9
D None of these
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
Crude oil is subjected to vacuum distillation in the last stage, because
A High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose
B Lighter/low boiling products are prone to thermal decomposition
C High purity products can be obtained thereby
D None of these
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
Natural gas recovered along with crude oil from oil wells is called wet natural gas which has a higher __________ compared to the dry natural gas.
A Unsaturated hydrocarbon content
B Calorific value
C Quantity of propane
D Quantity of butane
The terminology used for the bottom most product from the vacuum crude distillation unit is
A Residual crude
B Residuum
C Reduced crude
D Petrolatum

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