Related Questions

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
The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg.
A 1.2
B 12
C 120
D 700
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 catalytic cracking process, olefins crack __________ times faster than in thermal cracking process.
A 100
B 200-300
C 1000-10000
D 10
Paraffin base crude oil as compared to asphalt base crude gives
A Higher yield of straight run gasoline
B Higher octane number gasoline
C Lower viscosity index lube oil
D Poorer yield of lube oil
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
__________ catalytic reaction is involved in the thermal cracking of gas oil.
A Homogeneous
B Homogeneous non
C Heterogeneous
D Heterogeneous non
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
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
__________ base crude oil is also called asphaltic crude.
A Paraffinic
B Naphthenic
C Mixed
D Aromatic

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