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Petroleum Refinery Engineering
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Percentage of straight run gasoline in a typical crude oil may be around
Sulphur content in lighter and heavier petroleum products is generally determined respectively by
quartz tube method and lamp method.
bomb method and quartz tube method.
lamp method and bomb method.
bomb method and lamp method.
With increase in the molecular weight of aromatic present in kerosene, its smoking tendency
In catalytic cracking process, olefins crack __________ times faster than in thermal cracking process
Which of the following constituents present in petroleum is responsible for ash formation
Which of the followingis desirable in petrol (gasoline) but undesirable in kerosene
Molecular weight of crude petroleum may be around
Both asphalt and wax are produced by __________ base crude oils
Operating condition in the electrical dehydrators for crude oil is about
20 kgf/cm2 & 110°C.
1 atm. & 110 °C.
6.5 kgf/Cm2 & 95°C.
50 atm. and 150°C.
During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) __________ with increase in the amount of water
Hydrofining is the most recent and effective method for the
improvement of viscosity index.
removal of sulphur.
reduction of breathing loss.
improvement of smoke point.
Which of the following petroleum products contain minimum sulphur
High aniline point of diesel indicates that, it
has a large ignition delay.
has a low diesel index.
is highly aromatic.
is highly paraffinic.
Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol
The characterisation factor of a crude oil is calculated as 12.5. It means that; it is
NONE OF THESE
The most widely used crude topping column in refineries is the __________ column
Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about
Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about __________ °C
The most commonly used feed stock for the reforming reactor is
heavy fuel oil
casing head gasoline
straight run gasdine
Crude topping column operates at __________ pressure
Which is the most effective catalyst used in catalytic cracking of petroleum products
The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg
Smoke volatility index is equal to smoke point plus
0.42 x(% distilled at 204°C)
10 mm. approximately
0.84 x (% distilled at 204°C)
In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and byproducts.
The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction
A petroleum well is called 'dry', if it contains
no natural gas.
only natural gas.
all (a), (b) and (c).
very little oil.
Which is the most undesirable component in kerosene
Which of the following has the highest flash point of all
Increase in the specific gravity of petroleum products indicates
increase in aromatic content.
higher H/C ratio.
increase in thermal energy per unit weight.
decrease in paraffin content.
Which of the following processes is used for the production of petroleum coke
Deoiling is the process of removal of oil fromwax.
It is done by the __________ process
All (A), (B) & (C)
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