Petroleum Refinery Engineering Quiz | Petroleum Refinery Engineering General Knowledge Multiple Choice Questions(MCQs) & Answers

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Questions
1 Which of the following reactions is undesirable in the production of catalytically reformed gasoline ?
A Dehydrogenation of Naphthene
B Dehydrogenation of lower paraffins
C Dehydrocyclization of higher paraffins
D Isomerisation of paraffins

Answer: Dehydrogenation of lower paraffins
2 The most important property for a jet fuel is its________________?
A Viscosity
B Freezing point
C Calorific value
D Flash point

Answer: Freezing point
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3 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

Answer: 30-80
4 Which of the following is not an important property of fuel oil/furnace oil ?
A Sulphur content
B Viscosity
C Aniline point
D Flash point

Answer: Aniline point
5 High aniline point of a petrofuel (say diesel) indicates that ________________?
A It is highly aromatic in nature
B It is highly paraffinic in nature
C It has a very low diesel index
D Its ignition quality is very poor

Answer: It is highly paraffinic in nature
6 The vacuum maintained in vacuum distillation unit for reduced crude is about _______________ mm Hg?
A 1.2
B 12
C 120
D 700

Answer: 120
7 Liquefied Petroleum Gas (LPG) is mainly a mixture of _____________________?
A Propane & butane
B Methane & ethane
C High boiling olefins
D High boiling naphthenes

Answer: Propane & butane
8 Which of the following has the lowest cetane number ?
A Aromatics
B i-paraffins
C Naphthene
D Olefins

Answer: Aromatics
9 Pressure & temperature maintained in catalytic cracking is about__________________?
A 2 atm & 500°C
B 10 atm & 500°C
C 30 atm & 200°C
D 50 atm & 750°C

Answer: 2 atm & 500°C
10 In catalytic cracking, the___________________?
A Gasoline obtained has a very low octane number
B Pressure & temperature is very high
C Gasoline obtained has very high aromatic content
D Gasoline obtained has very high amount of gum forming compounds

Answer: Gasoline obtained has very high aromatic content
11 Carbon percentage (by weight) in crude petroleum may be about_________________?
A 85
B 48
C 32
D 28

Answer: 85
12 CnH2n is the general formula for_______________?
A Olefins
B Naphthenes
C Both A. and B.
D Neither A. nor B.

Answer: Both A. and B.
13 Which of the following has maximum hydrogen/carbon ratio (by weight) ?
A Naphtha
B Gasoline
C Diesel
D Fuel oil

Answer: Gasoline
14 Reforming converts_________________?
A Olefins into paraffins
B Naphthenes into aromatics
C Naphthenes into olefins
D Naphthenes into paraffin

Answer: Naphthenes into aromatics
15 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

Answer: Coking
16 The best method of determining sulphur in crude oil is by the _______________ method?
A Kjeldahl
B Dumas
C Bomb calorimeter
D Junkers calorimeter

Answer: Bomb calorimeter
17 Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________________ ptb (pounds per thousand barrel) ?
A 0.03
B 3
C 35
D 70

Answer: 3
18 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

Answer: Calorific value
19 Which of the following has the minimum °API gravity of all ?
A Furnace oil
B Petrol
C Diesel
D Kerosene

Answer: Furnace oil
20 LPG stands for ____________________?
A Liquefied petroleum gas
B Liquid petrol gas
C Liquid petroleum gas
D Liquefied petrol gas

Answer: Liquefied petroleum gas
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