DAPZOI
Home Ask MCQ Quiz Topics Login


Petroleum Refinery Engineering MCQ Questions & Answers

Petroleum Refinery Engineering MCQs : This section focuses on the "Petroleum Refinery Engineering". These Multiple Choice Questions (MCQs) should be practiced to improve the Petroleum Refinery Engineering skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

Clay treatment is used to remove

A. Salt from the crude oil
B. Colour & dissolved gases from cracked gasoline
C. Wax from lube oil
D. None of these

View Answer

Question 2

The pressure (kg/cm² ) and temperature (°C) maintained in electrical desalters for crude oil are respectively

A. 10 and 120
B. 1 and 200
C. 50 and 250
D. 10 and 300

View Answer

Question 3

Petroleum is believed to have originated from __________ sources.

A. Vegetable
B. Animal
C. Both A & B
D. Neither A nor B

View Answer

Question 4

Octane number (unleaded) of reformed gasoline may be upto

A. 60
B. 70
C. 80
D. 90

View Answer

Question 5

Straight run petrol as compared to methyl/ethyl alcohol has

A. Lower calorific value
B. Lower octane number
C. Higher specific gravity
D. Higher ignition temperature

View Answer

Question 6

Highest quality bitumen is produced from the __________ crude oil.

A. Paraffinic
B. Naphthenic
C. Intermediate
D. Mixed

View Answer

Question 7

The main use of heavy gas oil produced by the vacuum distillation unit is as a

A. Blending component for kerosene
B. Blending component for petrol
C. Feedstock for fluid catalytic cracking unit
D. None of these

View Answer

Question 8

Fuel oil is subjected to visbreaking to reduce its

A. Pour point
B. Viscosity
C. Pressure drop on pumping
D. All of the above

View Answer

Question 9

Pressure & temperature maintained in catalytic cracking is about

A. 2atm & 500°C
B. 10atm & 500°C
C. 30atm & 200°C
D. 50atm. & 750°C

View Answer

Question 10

__________ determination is not a very significant and important test for gasoline.

A. Gum & sulphur content
B. Viscosity
C. Octane number
D. Reid vapor pressure

View Answer

Question 11

Petroleum deposits are detected by the.

A. Oil seepage at the surface of the earth
B. Measuremet of density, elasticity and magnetic & electric properties of the rock in the crust of the earth
C. Age & nature of rocks inside the crust of the earth
D. All of the above

View Answer

Question 12

Water content in the crude oil as it comes out of oil well may be upto __________ percent.

A. 2
B. 5
C. 10
D. 25

View Answer

Question 13

Aniline point is a property of the

A. Diesel
B. LPG
C. Naphtha
D. Gasoline

View Answer

Question 14

Which of the following additives improves the cetane number of diesel?

A. Amyl nitrate
B. Ethyl mercaptan
C. Napthenic acid
D. Tetra ethyl lead

View Answer

Question 15

Waxy crudes are treated with chemical additives mainly to

A. Depress its pour point
B. Dissolve wax
C. Precipitate wax
D. Remove wax

View Answer

Question 16

Pick out the wrong statement.

A. Higher specific gravity of petroleum products means higher C/H ratio
B. Aromatics have lower specific gravity than corresponding paraffins
C. Hydrocarbons of low specific gravity (e.g, paraffins) possess the maximum thermal energy per unit volume
D. Hydrocarbons of high specific gravity (eg, aromatics) possess the maximum thermal energy per unit weight

View Answer

Question 17

Feed for reforming is generally

A. Naphtha or straight run gasoline
B. Reduced crude
C. Vacuum gas oil
D. Atmospheric gas oil

View Answer

Question 18

Furfural solvent extraction is used for upgrading (by dissolving aromatics)

A. naphtha
B. lubricating oils
C. wax
D. cracking feedstock

View Answer

Question 19

The proper arrangement of the petroleum fractions in order of their boiling points is

A. Lubricating oil > diesel > petrol > LPG
B. Lubricating oil > petrol > diesel > LPG
C. Petrol > lubricating oil > diesel > LPG
D. Petrol > diesel > LPG > lubricating oil

View Answer

Question 20

Smoke point of a test sample of kerosene is found to be 15 mm. On removal of __________ from it, the smoke point rises to 25 mm.

A. n-paraffins
B. olefins
C. aromatics
D. none of these

View Answer

Question 21

Solvent used in Edeleanu process is

A. Furfural
B. Propane
C. Liquid SO₂
D. Phenol

View Answer

Question 22

The doctor's solution comprises of sodium plumbite in

A. Alcohal
B. Water
C. Aqueous caustic soda
D. Soda ash

View Answer

Question 23

Naphthenic acid is represented by

A. CnH2n+2O₂
B. CnHsub>2n-2O₂
C. CnHsub>2n+2O₂ (n ≥ 6)
D. CnHsub>2n+6O₂ (n ≤ 6)

View Answer

Question 24

Solvent naphtha' used mostly as a solvent in paints and perfumery is produced by the __________ of virgin naphtha into small boiling range cuts.

A. Steam reforming
B. Distillation
C. Desulphurisation
D. None of these

View Answer

Question 25

Which of the following is the most widely used cracking process in oil refineries?

A. Dubbs process
B. T.C.C. moving bed process
C. Fluidised bed catalytic cracking process
D. Houdry's fixed bed process

View Answer

Question 26

With increase in the number of carbon and hydrogen atoms in hydrocarbon molecules, the density of petroleum products

A. Decreases
B. Increases
C. Remains same
D. Unpredictable from the data

View Answer

Question 27

Absolute vapor pressure of petrofuels is found by Reid bomb which is heated in water bath to 100°F. In Reid apparatus, the ratio of the volume of air chamber to that of the liquid fuel chamber is

A. 1
B. 2
C. 3
D. 4

View Answer

Question 28

Which of the following is an additive used for improving the cetane number of diesel?

A. Tetraethyl lead
B. Tetramethyllead
C. Ethyl nitrate or acetone
D. None of these

View Answer

Question 29

Cracking is

A. An exothermic reaction
B. An endothermic reaction
C. Favoured at very low temperature
D. None of these

View Answer

Question 30

Which one is used to determine the colour of petroleum products?

A. Colour comparator
B. Saybolt chromometer
C. Cleveland apparatus
D. None of these

View Answer

Question 31

1 centistoke is equal to __________ Redwood I seconds.

A. 1
B. 4.08
C. 0.408
D. 40.8

View Answer

Question 32

Main constituent of natural gas is

A. CH₄
B. C₂H₂
C. C₂H₄
D. C₂H₆

View Answer

Question 33

Which of the following tests is not done for transformer oil ?

A. Flash point and acid value.
B. Aniline point.
C. Dielectric strength.
D. Copper strip corrosion test.

View Answer

Question 34

Hydrogen content in petroleum products varies from 12 to 15% (by weight). As a result the difference between gross and net heating value of petroleum fuels varies in the range of __________ kcal/kg.

A. 600-750
B. 250-350
C. 1000-1500
D. 2000-2500

View Answer

Question 35

Which of the following gasolines (unleaded) has the least octane number?

A. Catalytically cracked gasoline
B. Straight run gasoline
C. Catalytically reformed gasoline
D. Polymer gasoline

View Answer

Question 36

The octane number of aviation gasoline may be

A. 79
B. 87
C. 97
D. >100

View Answer

Question 37

Quinoline is a/an __________ compound.

A. Sulphur
B. Nitrogen
C. Oxygen
D. None of these

View Answer

Question 38

The solvent used in Barisol dewaxing process is

A. Hexane
B. Furfural
C. Benzol and ethylene dichloride
D. Methyl ethyl ketone (MEK)

View Answer

Question 39

The main use of heavy gas oil produced by the vacuum distillation unit is as a

A. blending component for kerosene.
B. blending component for petrol.
C. feedstock for fluid catalytic cracking unit.
D. none of these.

View Answer

Question 40

Which of the following has the highest viscosity of all (at a given temperature)?

A. Naphtha
B. Fuel oil
C. Light diesel oil
D. Petrol

View Answer

Question 41

Mercaptans are

A. low boiling sulphur compounds.
B. added in LPG cylinders to detect gas leakage by its smell.
C. undesirable in petrol, as they reduce its octane number.
D. all (a), (b) and (c)

View Answer

Question 42

Research octane number refers to the

A. Low octane number motor fuels
B. High octane number motor fuels
C. High octane number aviation fuels
D. Unleaded motor fuels

View Answer

Question 43

The characterisation factor of crude petroleum oil is around

A. 3
B. 11
C. 22
D. 28

View Answer

Question 44

Catalytic desulphurisation process used for sweetening of straight run gasoline and kerosene uses __________ as catalyst.

A. bauxite
B. fuller's earth
C. activated clay
D. all (a), (b) & (c)

View Answer

Question 45

Liquefied Petroleum Gas (LPG) is mainly a mixture of

A. Propane & butane
B. Methane & ethane
C. High boiling olefins
D. High boiling naphthenes

View Answer

Question 46

Catalyst used in the catalytic polymerisation is

A. Phosphoric acid on kieselghur
B. Aluminium chloride
C. Nickel
D. Vanadium pentaoxide

View Answer

Question 47

Higher viscosity of lubricating oil usually signifies

A. Lower Reid vapour pressure
B. Higher acid number
C. Higher flash point and fire point
D. Lower flash point and fire point

View Answer

Question 48

Which of the following processes consumes hydrogen?

A. Fluid catalytic cracking
B. Visbreaking
C. Propane deasphalting
D. None of these

View Answer

Question 49

Which of the following categories of gasoline has the highest lead susceptibility?

A. Straight run gasoline
B. Platinum reformed gasoline
C. Catalytical cracked gasoline
D. Polymer gasoline

View Answer

Question 50

Mercaptans is represented as (where R and R' are alkyl groups)

A. R-COOH
B. R-S-H
C. R-S-R
D. R-S-R'

View Answer

Question 51

The order of preference for feedstock to a catalytic reformer is

A. Catalytic naphtha - coking naphtha - virgin naphtha
B. Coking naphtha - virgin naphtha - catalytic naphtha
C. Virgin naphtha - catalytic naphtha - coking naphtha
D. Virgin naphtha - coking naphtha - catalytic naphtha

View Answer

Question 52

The coking process normally mostly used in Indian oil refineries is the __________ coking process.

A. delayed
B. flexi
C. fluid
D. contact

View Answer

Question 53

Operating condition in the electrical dehydrators for crude oil is about

A. 6.5 kgf/Cm2 & 95°C.
B. 1 atm. & 110 °C.
C. 20 kgf/cm2 & 110°C.
D. 50 atm. and 150°C.

View Answer

Question 54

The average boiling point of aviation turbine fuel is closest to that of

A. Lubricating oils
B. LPG
C. Diesel
D. Kerosene

View Answer

Question 55

Pour point and freezing point is equal for

A. petrol
B. diesel
C. water
D. crude petroleum

View Answer

Question 56

Solvent used in the Udex (glycol) extraction process for removal of light aromatics from cracked naphtha is

A. Propane
B. Diethylene glycol
C. Aqueous solution (10% water) of diethylene glycol
D. Methyl ethyl ketone (MEK)

View Answer

Question 57

The first crude oil refinery of India is located at

A. Naharkatiya
B. Digboi
C. Kochin
D. Madras

View Answer

Question 58

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

View Answer

Question 59

Pick out the additive property of a lube oil out of following.

A. °API gravity
B. Specific gravity
C. Viscosity
D. Flashpoint

View Answer

Question 60

Asphalts are

A. Low molecular weight & low boiling point compounds present in petroleum
B. Desirable in catalytic cracking feedstock, because they produce coke
C. Readily oxidisable and form carbonaceous sludge
D. All of the above

View Answer

Question 61

Which of the following contains maximum sulphur?

A. Diesel
B. Petrol
C. Kerosene
D. Fuel oil

View Answer

Question 62

Which of the following is not a sulphur compound present in petroleum ?

A. Thiophenes
B. Mercaptans
C. Sulphones
D. Pyroles

View Answer

Question 63

Glycol added to petrol acts as a/an __________ agent.

A. Anti-knocking
B. Anti-icing
C. Anti-gum forming
D. Dewaxing

View Answer

Question 64

Which of the following is used as a catalyst in fluidised bed catalytic cracking?

A. Silica-magnesia
B. Silica-alumina
C. Bentonite clays
D. All of the above

View Answer

Question 65

Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is

A. More than 100
B. Round about 100
C. Between 50 and 100
D. Less than 25

View Answer

Question 66

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.

A. Decreases
B. Increases
C. Remains unchanged
D. Decreases linearly

View Answer

Question 67

With increase in the molecular weight of aromatic present in kerosene, its smoking tendency

A. Increases
B. Decreases
C. Remains same
D. Is unpredictable

View Answer

Question 68

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

View Answer

Question 69

Solvent used in duo-sol extraction for lube oil upgradation is a mixture of

A. Propane & phenol-cresol mixture
B. Methyl ethyl ketone & glycol
C. Phenol & furfural
D. Propane & liquid sulphur dioxide

View Answer

Question 70

Which of the following is desirable in diesel and kerosene but is undersirable in gasoline?

A. Aromatics
B. Mercaptans
C. Paraffins
D. Naphthenic acid

View Answer

Question 71

In petroleum refining, the process used for conversion of hydrocarbons to aromatics is

A. catalytic cracking
B. catalytic reforming
C. hydrotreating
D. alkylation

View Answer

Question 72

True boiling point apparatus is used for the

A. determination of characterisation factor.
B. evaluation of oil stocks.
C. determination of true vapour pressure.
D. none of these.

View Answer

Question 73

Dearomatisation of kerosene (by liquid sulphur dioxide extraction) is done to

A. Increase its smoke point
B. Improve its oxidation stability
C. Decrease the breathing loss
D. None of these

View Answer

Question 74

Octane numbers of motor gasoline used in India and America are respectively

A. 87 & 94
B. 94 & 87
C. 94 & 100
D. 83 & 100

View Answer

Question 75

Feedstock for polymerisation is

A. Naphtha
B. Cracked gases rich in C₂ & C₄ olefins
C. Low boiling aromatics
D. None of these

View Answer

Question 76

For gasoline, the flash point (<50°C) is determined by the

A. Abel apparatus.
B. Pensky-Marten's apparatus.
C. Saybolt chromometer.
D. none of these.

View Answer

Question 77

Flash point of an oil gives an idea of the

A. nature of boiling point diagram of the system.
B. amount of low boiling fraction present.
C. explosion hazards.
D. all (a), (b) and (c).

View Answer

Question 78

Petroleum coke is commercially produced by the __________ process.

A. Hydrocracking
B. Visbreaking
C. Fluid catalytic cracking
D. Delayed coking

View Answer

Question 79

Pick out the wrong statement.

A. Pensky-Marten apparatus is used for determining flash points above 50°C
B. Characterisation factor of paraffinic crude oil is more than 12
C. Abel apparatus is used for determining flash points below 50°C
D. An oil having high susceptibility to change in viscosity with temperature changes, has a high viscosity index

View Answer

Question 80

Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has

A. High pour point and low smoke point
B. Low viscosity index
C. High self-ingnition temperature
D. All of the above

View Answer

Question 81

Good quality kerosene should have

A. Low smoke point
B. High smoke point
C. High aromatics content
D. Low paraffins content

View Answer

Question 82

Petroleum

A. Is optically active
B. Constitutes mainly of olefins
C. Does not contain asphalt
D. Does not contain aromatics

View Answer

Question 83

Cetane number of diesel used in trucks may be about

A. 50
B. 14
C. 35
D. 85

View Answer

Question 84

In catalytic alkylation, higher iso-butane to olefin ratio gives

A. Low final boiling point product
B. Higher yield
C. Both A & B
D. Neither A nor B

View Answer

Question 85

Waxes present in petroleum products

A. Can be separated out by distillation
B. Are not soluble in them
C. Crystallise out at low temperature
D. Decrease their viscosity

View Answer

Question 86

Which of the following is used as a catalyst in fluidised bed catalytic cracking ?

A. Silica-magnesia
B. Silica-alumina
C. Bentonite clays
D. All (a), (b) and (c)

View Answer

Question 87

The conductivity of crude oil-water mixture depends on the

A. PH value
B. Water percentage
C. Temperature
D. All of the above

View Answer

Question 88

Which of the following factors does not govern the mechanism of petroleum formation from organic sources?

A. PH of the soil
B. Bacterial action
C. Heat
D. Pressure

View Answer

Question 89

Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene.

A. Smoking tendency of hydrocarbons increases in the order : paraffins → isoparaffins → naphthenes → aromatics.
B. Smoking tendency of paraffins increases with decrease in its molecular weight.
C. Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond.
D. Smoking tendency of aromatics decreases with increase in its molecular weight.

View Answer

Question 90

Mercapsol and Unisol processes are meant for the

A. Dearomatisation of kerosene
B. Removal of mercaptans
C. Dewaxing
D. Decoloration

View Answer

Question 91

Smoke point of a good burning kerosene may be around __________ mm.

A. 0-5
B. 20-25
C. 60-75
D. 100-120

View Answer

Question 92

Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about

A. 0.1
B. 1
C. 2.5
D. 3.5

View Answer

Question 93

Which is an anticing compound?

A. Amyl nitrate
B. Alcohals
C. Mercaptans
D. Pyridine

View Answer

Question 94

With increase in density, the viscosity of petroleum products

A. Increases
B. Decreases
C. Remains same
D. Either A or B

View Answer

Question 95

Breathing loss on storage of gasoline occurs due to the

A. Presence of unsaturated air
B. Fluctuation of ambient temperature during day and night
C. Both A & B
D. Neither A nor B

View Answer

Question 96

Butadiene is a/an

A. Di-olefin
B. Naphthene
C. Aromatic
D. Olefin

View Answer

Question 97

The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg.

A. 1.2
B. 12
C. 120
D. 700

View Answer

Question 98

Which of the following has the maximum °API gravity of all?

A. Diesel
B. Kerosene
C. Petrol
D. Furnace oil

View Answer

Question 99

Olefins are

A. Saturated hydrocarbons
B. Unsaturated cyclic compounds (hydrocarbons)
C. Present in substantially good quantity in crude petroleum
D. None of these

View Answer

Question 100

Pick out the correct statement.

A. Paraffins have higher octane number than corresponding iso-paraffin
B. Paraffins have lower smoke point than aromatics
C. Suitability of kerosene as a fuel & as an illuminant may be determined by char value test
D. Aviation fuel should have very high cloud point

View Answer

Question 101

The main reaction in reforming is the

A. Dehydrogenation of naphthenes
B. Hydrogenation of naphthenes
C. Hydrocracking of paraffins
D. Saturation of olefins

View Answer

Question 102

__________ converts n-paraffins to i-paraffins.

A. Alkylation
B. Polymerisation
C. Isomerisation
D. none of these

View Answer

Question 103

Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about __________ °C.

A. 50
B. 70
C. 90
D. 140

View Answer

Question 104

Flash point of diesel/kerosene (>50°C) is determined by the

A. Abel apparatus
B. Pensky-Martens apparatus
C. Saybolt chromometer
D. None of these

View Answer

Question 105

Which of the following is the easiest to crack?

A. Paraffins
B. Olefins
C. Naphthenes
D. Aromatics

View Answer

Question 106

Solvent used in the deasphalting process is

A. furfurol
B. phenol
C. propane
D. hexane

View Answer

Question 107

Which parameter is used for the grading of paraffin waxes?

A. Specific gravity
B. Melting point
C. Viscosity
D. Penetration number

View Answer

Question 108

Choose the correct statement.

A. Octane number of i-octane is zero
B. Octane number of paraffins increases with increasing number of carbon atoms
C. Branched chain paraffins have higher octane number than straight chain paraffins with same number of carbon atoms
D. The aromatics have lower octane number than naphthenes with same number of carbon atoms

View Answer

Question 109

Performance number of a liquid fuel is related to its

A. Wax content
B. Spontaneous ignition temperature
C. Knocking tendency
D. Sulphur content

View Answer

Question 110

Octane number of n-heptane is assumed to be

A. 100
B. 0
C. 70
D. ∞

View Answer

Question 111

Pick out the wrong statement.

A. Higher temperature is employed in visbreaking than in thermal cracking
B. Pyrolysis is a mild thermal cracking process
C. Lead suceptibility of petrol produced by catalytic process is more than that produced by thermal cracking
D. Operating pressure and temperature in thermal cracking process is more than that in catalytic cracking process

View Answer

Question 112

Operating condition in the electrical dehydrators for crude oil is about

A. 6.5 kgf/Cm² & 95°C
B. 1 atm. & 110 °C
C. 20 kgf/cm² & 110°C
D. 50 atm. and 150°C

View Answer

Question 113

Crude petroleum oil is a __________ fuel.

A. Primary
B. Fossil
C. Both A & B
D. Secondary

View Answer

Question 114

Aniline point test of an oil qualitatively indicates the __________ content of an oil.

A. Paraffin
B. Olefin
C. Aromatic
D. Naphthene

View Answer

Question 115

Aniline point of high speed diesel may be about __________ °C.

A. 35
B. 70
C. 105
D. 150

View Answer

Question 116

Crude oil is transported inland from oil field to refineries, mainly by the

A. Road tankers
B. Rail tankers
C. Underground pipelines
D. None of these

View Answer

Question 117

Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with

A. Methyl alcohol
B. Ethyl alcohol
C. Methane
D. Ethane

View Answer

Question 118

The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol.

A. 3
B. 300
C. 3000
D. 1000

View Answer

Question 119

Flash point of motor gasoline may be around __________ °C.

A. 10
B. 45
C. 100
D. 150

View Answer

Question 120

Catalyst used in alkylation process is

A. Sulphuric acid
B. Nickel
C. Silica gel
D. Alumina

View Answer

Question 121

Octane number of gasoline is a measure of its

A. Resistance to knock
B. Ignition delay
C. Ignition temperature
D. Smoke point

View Answer

Question 122

Which of the following has the lowest viscosity (at a given temperature) of all?

A. Naphtha
B. Kerosene
C. Diesel
D. Lube oil

View Answer

Question 123

Gasoline extracted from natural gas (by compression and cooling) is called the __________ gasoline.

A. Polymer
B. Unleaded
C. Casing head
D. Straight run

View Answer

Question 124

Detergent is added as an additive in engine lubricating oil to

A. Reduce deposit formation
B. Keep contaminants in suspension
C. Increase oxidation stability
D. Prevent rusting

View Answer

Question 125

The best method of determining sulphur in crude oil is by the __________ method.

A. Kjeldah
B. Duma
C. Bomb calorimeter
D. Junkar's calorimeter

View Answer

Question 126

An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating.

A. 5
B. 15
C. 40
D. 60

View Answer

Question 127

Casing head gasoline is the liquid

A. butane.
B. propane.
C. natural gas.
D. gasoline separated from wet natural gas by compression.

View Answer

Question 128

Tanks used for the storage of petroleum products (which are inflammable) should be painted with a __________ paint.

A. black
B. white
C. red
D. yellow

View Answer

Question 129

Flash point of an oil gives an idea of the

A. Nature of boiling point diagram of the system
B. Amount of low boiling fraction present
C. Explosion hazards
D. All of the above

View Answer

Question 130

Reid vapour pressure of gasoline is the measure of its

A. Pour point
B. Cloud point
C. Vapour locking tendency
D. Carbon residue

View Answer

Question 131

Carbon/hydrogen ratio (by weight) is maximum (out of following) for

A. Gasoline
B. Kerosene
C. Light gas oil
D. Heavy fuel oil

View Answer

Question 132

Illuminating characteristics of kerosene is expressed by its

A. smoke point
B. aniline point
C. luminosity number
D. aromatic content

View Answer

Question 133

Which of the following has the lowest cetane number?

A. Aromatics
B. I-paraffins
C. Naphthene
D. Olefins

View Answer

Question 134

Which of the following has maximum hydrogen/carbon ratio (by weight)?

A. Naphtha
B. Gasoline
C. Diesel
D. Fuel oil

View Answer

Question 135

The main purpose of recycling the byproduct hydrogen gas in the reformer reactor is to

A. Obviate catalyst poisoning
B. Maintain the reaction temperature
C. Sustain the reactor pressure
D. Hydrogenate the feed stock

View Answer

Question 136

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

View Answer

Question 137

Which is the most undesirable component in kerosene ?

A. Aromatics
B. i-paraffins
C. n-paraffins
D. Naphthenes

View Answer

Question 138

Pick out the wrong statement.

A. Alkylation produces a larger iso-paraf-fin (having higher octane number) from the reaction of an olefin with smaller iso-paraffin
B. Catalytic alkylation processes use HF, AlCl3 & H₂SO₄ as Catalysts
C. All the alkylation processes use very high temperature (> 1000°C)
D. Gasoline having an octane number of 90 can be produced by alkylation process

View Answer

Question 139

Pick out the wrong statement.

A. Lower boiling paraffins have higher octane number than higher paraffins
B. Dehydrogenation of naphthenes to aromatics is a desirable reaction in reforming process
C. The most ideal feedstock for thermal reforming is dearomatised kerosene
D. Catalyst used in catalytic reforming is platinum on silica-alumina base

View Answer

Question 140

Which of the following is desirable in petrol (gasoline) but undesirable in kerosene?

A. Paraffins
B. Aromatics
C. Mercaptans
D. Naphthenic acid

View Answer

Question 141

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

View Answer

Question 142

Penetration test determines the __________ of the grease.

A. Stiffness
B. Lubricating properties (e.g. oilness)
C. Service temperature
D. Variation in viscosity with temperature

View Answer

Question 143

Flash point of a liquid petroleum fuel gives an idea about its

A. Volatility
B. Explosion hazards characteristics
C. Nature of boiling point diagram
D. All of the above

View Answer

Question 144

The most important property for a jet fuel is its

A. Viscosity
B. Freezing point
C. Calorific value
D. Flash point

View Answer

Question 145

Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO₂ extraction (Edeleanu process), its smoke point may become __________ mm.

A. 5
B. 10
C. 25
D. 100

View Answer

Question 146

Catalyst used in catalytic reforming is

A. platinum on alumina
B. nickel
C. iron
D. aluminium chloride

View Answer

Question 147

True vapour pressure of a petroleum fraction __________ Reid vapour pressure.

A. Is less than
B. Is more than
C. Is same as
D. May be either more or less than

View Answer

Question 148

Hydrocracking employs

A. High pressure & temperature
B. Low pressure & temperature
C. High pressure and low temperature
D. High temperature and low pressure

View Answer

Question 149

The reservoir rock containing petroleum has

A. Low porosity
B. High permeability
C. High porosity
D. Both B and C

View Answer

Question 150

Which of the following has the minimum °API gravity of all?

A. Diesel
B. Kerosene
C. Petrol
D. Furnace oil

View Answer

Question 151

Both asphalt and wax are produced by __________ base crude oils.

A. Naphthenic
B. Asphalt
C. Paraffin
D. Mixed

View Answer

Question 152

The colour of gasoline is an indication of its

A. octane number.
B. lead susceptibility.
C. gum forming tendency & thoroughness of refining.
D. none of these.

View Answer

Question 153

Pick out the wrong statement.

A. Aromatics have higher specific gravity than paraffins
B. Gross calorific value (GCV) of petrofuels is equal to (12400 - 2100 ρ2) where, ρ is the specific gravity of the fuel at 15.5°C
C. Heavier petrofuels have higher GCV on weight basis (i.e., Kcal/kg) but lower GCV on volume basis (i.e., Kcal/litre)
D. Higher specific gravity of petrofuels means higher C/H ratio

View Answer

Question 154

Testing of the knocking characteristics of petrofuels is done in a __________ engine.

A. Carnot
B. CFR (Co-operative fuel research)
C. Stirling
D. Diesel

View Answer

Question 155

Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene.

A. Smoking tendency of hydrocarbons increases in the order : paraffins → isoparaffins → naphthenes → aromatics
B. Smoking tendency of paraffins increases with decrease in its molecular weight
C. Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond
D. Smoking tendency of aromatics decreases with increase in its molecular weight

View Answer

Question 156

Products drawn from the top to bottom of the crude oil distillation column has progressively increasing

A. Boiling points
B. Molecular weight
C. C/H ratio
D. All of the above

View Answer

Question 157

Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic

A. Cracking
B. Polymerisation
C. Reforming
D. Isomerisation

View Answer

Question 158

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

View Answer

Question 159

Sulphuric acid treatment of petroleum products removes the __________ materials.

A. Gum forming
B. Color forming
C. Asphaltic
D. All of the above

View Answer

Question 160

Octane number (unleaded) of gasoline produced by isomerisation of butane may be about

A. 45
B. 55
C. 70
D. 90

View Answer

Question 161

Water separometer index (modified) (WSIM) of a petrofuel is the measure of its

A. Emulsification tendency
B. Water separation characteristics
C. Water content
D. Water absorbing capacity from atmosphere

View Answer

Question 162

The most widely used crude topping column in refineries is the __________ column.

A. Bubble-cap
B. Packed bed
C. Fluidised bed
D. Perforated plate

View Answer

Question 163

Catalyst used in the catalytic cracking is

A. Silica-alumina
B. Silica gel
C. Vanadium pentoxide
D. Nickel

View Answer

Question 164

Smoke point of kerosene expresses its

A. Burning characteristics
B. Luminosity characteristics
C. Aromatic content directly
D. Lamp wick wetting characteristics

View Answer

Question 165

Choose the correct statement.

A. Coking tendency increases with increasing molecular weight
B. Coking tendency decreases with increasing molecular weight
C. Higher pressure enhances coke formation
D. Coking is an exothermic reaction

View Answer

Question 166

Crude oils containing more than __________ kg of total salts (expressed in terms of NaCl) per thousand barrel is called a 'salty crude'.

A. 1
B. 5
C. 15
D. 25

View Answer

Question 167

Cetane number of alpha methyl naphthalene is assumed to be

A. 0
B. 100
C. 50
D. ∞

View Answer

Question 168

In case of liquid petrofuels, momentary combustion is observed at its

A. Flash point
B. Preheating temperature corresponding to viscosity of 25 centistokes
C. Flame temperature
D. Fire point

View Answer

Question 169

Diesel used in naval applications has a minimum cetane number of

A. 25
B. 35
C. 45
D. 65

View Answer

Question 170

The most commonly used feed stock for the reforming reactor is

A. Heavy fuel oil
B. Residuum
C. Straight run gasdine
D. Casing head gasoline

View Answer

Question 171

Petrolatum is

A. Same as petroleum ether
B. Petroleum coke
C. A mixture of microcrystalline wax in viscous hydrocarbon liquids
D. None of these

View Answer

Question 172

Polymerisation

A. Produces i-octane from cracked gases containing i-butane and butene
B. Causes olefins to combine with each other
C. Causes aromatics to combine with each other
D. Is aimed at producing lubricating oil

View Answer

Question 173

Which of the following has the highest gum forming tendency in gosoline?

A. Paraffins
B. Diolefins
C. Aromatics
D. Naphthenes

View Answer

Question 174

Which of the following tests is not done for transformer oil?

A. Flash point and acid value
B. Aniline point
C. Dielectric strength
D. Copper strip corrosion test

View Answer

Question 175

Tetra-ethyl lead is added in gasoline to

A. Increase its smoke point
B. Reduce gum formation
C. Reduce the pour point
D. Increase its octane number

View Answer

Question 176

Mercaptans are added to liquefied petroleum gas (LPG) to

A. Reduce its cost
B. Narrow down its explosion limit
C. Assist in checking its leakage from cylinder
D. Increase its calorific value

View Answer

Question 177

Cetane number of high speed diesel must be?

A. 30
B. 45
C. 75
D. 95

View Answer

Question 178

Sour crude means the __________ bearing crude.

A. Asphalt
B. Sulphur compounds
C. Wax
D. Nitrogen compounds

View Answer

Question 179

Viscosity index of a lubricating oil

A. is the measure of its flash point.
B. is the measure of variation of viscosity with temperature.
C. should be low.
D. none of these.

View Answer

Question 180

__________ base crude oil is also called asphaltic crude.

A. Paraffinic
B. Naphthenic
C. Mixed
D. Aromatic

View Answer

Question 181

Casing head gasoline is the liquid

A. Butane
B. Propane
C. Natural gas
D. Gasoline separated from wet natural gas by compression

View Answer

Question 182

Which of the following constituents present in petroleum is responsible for ash formation?

A. Nitrogen compounds
B. Organometallic compounds
C. Sulphur compounds
D. Oxygen compounds

View Answer

Question 183

In hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen

A. Enhances the desulphurisation process
B. Minimises coke formation
C. Both A & B
D. Neither A nor B

View Answer

Question 184

A multigrade lubricating oil means an oil having high

A. Viscosity index
B. Viscosity
C. Aniline point
D. Flash point

View Answer

Question 185

Carbon percentage (by weight) in crude petroleum may be about

A. 65
B. 75
C. 85
D. 95

View Answer

Question 186

Which of the following fractions of petroleum contains maximum sulphur?

A. Diesel
B. Gasoline
C. Naphtha
D. Atmospheric residue

View Answer

Question 187

Phenols are added in gasoline to

A. Improve the octane number
B. Act as an antioxidant
C. Reduce its viscosity
D. Increase its pour point

View Answer

Question 188

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

View Answer

Question 189

Which is almost absent in crude petroleum?

A. Olefins
B. Mercaptans
C. Naphthenes
D. Cycloparaffins

View Answer

Question 190

Flash point of atmospheric distillation residue is determined by __________ apparates.

A. Pensky-Martens (closed cup type).
B. Abel.
C. Cleveland (open cup type)
D. none of these.

View Answer

Question 191

The yield of straight run LPG from crude oil is about __________ weight percent.

A. 20-25
B. 1-1.5
C. 10-15
D. 0.1-0.2

View Answer

Question 192

LPG stands for

A. Liquid petroleum gas
B. Liquified petrol gas
C. Liquid petrol gas
D. Liquefied petroleum gas

View Answer

Question 193

Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API) ?

A. Diesel
B. Gasoline
C. Atmospheric gas oil
D. Vacuum gas oil

View Answer

Question 194

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

View Answer

Question 195

True boiling point apparatus is used for the

A. Determination of characterisation factor
B. Evaluation of oil stocks
C. Determination of true vapour pressure
D. None of these

View Answer

Question 196

Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm² is maintained during cracking mainly to

A. Increase the yield of light distillates
B. Suppress coke formation
C. Enhance the octane number of gasoline
D. Reduce gum content in gasoline

View Answer

Question 197

Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about __________ kg/cm² .

A. 1.5
B. 3
C. 6
D. 12

View Answer

Question 198

Sulphur content in lighter and heavier petroleum products is generally determined respectively by

A. Lamp method and bomb method
B. Bomb method and lamp method
C. Bomb method and quartz tube method
D. Quartz tube method and lamp method

View Answer

Question 199

Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms.

A. 0.1 to 0.5
B. 1.5 to 4.5
C. 7.5 to 12.5
D. 15-20

View Answer

Question 200

Crude oil produced by Indian oil fields are predominantly __________ in nature.

A. Paraffinic
B. Naphthenic
C. Asphaltic
D. Mixed base

View Answer

Question 201

A petroleum well is called 'dry', if it contains

A. Very little oil
B. No natural gas
C. Only natural gas
D. All of the above

View Answer

Question 202

Octane number of gasoline produced by two stage fluidised catalytic cracking process is

A. 80
B. 87
C. 92
D. 97

View Answer

Question 203

In catalytic cracking process, olefins crack __________ times faster than in thermal cracking process.

A. 100
B. 200-300
C. 1000-10000
D. 10

View Answer

Question 204

Diesel index is defined as

A. (°API) x (Aniline Point, °F)/100
B. (°API) x (Aniline Point, °C)/100
C. (°API) x (100)/Aniline Point, °F
D. (°API) x (100)/Aniline Point, °C

View Answer

Question 205

Pick out the wrong statement.

A. Multigrade lubricating oils have high viscosity index
B. Paraffinic oil has very high viscosity index
C. Naphthenic oil has very low viscosity index
D. High viscosity index means a large change in viscosity with change in temperature

View Answer

Question 206

The general formula of naphthenes is

A. CnH2n + 2
B. CnH2n - 6 (where, n ≥ 6)
C. CnHn - 4
D. Same as that for olefins i.e. CnH2n

View Answer

Question 207

Hydrogen percentage (by weight) in crude petroleum may be about

A. 5
B. 15
C. 25
D. 35

View Answer

Question 208

Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is __________ centistokes (or 100 Redwood I seconds).

A. 5
B. 25
C. 50
D. 100

View Answer

Question 209

Reforming converts

A. Olefins into paraffins
B. Naphthenes into aromatics
C. Naphthenes into olefins
D. Naphthenes into paraffin

View Answer

Question 210

Presence of aromatics in

A. Diesel increases its cetane number
B. Kerosene increases its smoke point
C. Petrol increases its octane number
D. All of the above

View Answer

Question 211

Removal of light fractions from crude oil is called its

A. Sweetening
B. Dehydration
C. Stabilisation
D. Visbreaking

View Answer

Question 212

Paraffins are desirable in lubricating oil, as it has got high

A. Viscosity
B. Viscosity index
C. Smoke point
D. Pour point

View Answer

Question 213

Isomerisation converts the __________ tot-paraffins.

A. Paraffins
B. Olefins
C. Naphthenes
D. None of these

View Answer

Question 214

Which one is preferred for aircraft engine?

A. High viscosity index lube oil
B. Low viscosity index lube oil
C. High freezing point aviation fuel
D. None of these

View Answer

Question 215

LPG when brought to atmospheric pressure & temperature will be a

A. Liquid lighter than water
B. Liquid heavier than water
C. Gas lighter than air
D. Gas heavier than air

View Answer

Question 216

Which of the following has the highest flash point of all?

A. Diesel
B. Kerosene
C. Petrol
D. Furnace oil

View Answer

Question 217

Aniline point is the temperature at which

A. Equal weight of diesel & the aniline are completely miscible
B. Equal weight of aniline & the test sample are completely miscible
C. Equal volume of aniline & the test sample are completely miscible
D. Aniline vaporises

View Answer

Question 218

Stabilisation of gasoline (petrol) means

A. removal of dissolved gases from it.
B. increasing its oxidation stability.
C. improving its lead susceptibility.
D. increasing its vapour pressure.

View Answer

Question 219

Which one of the following processes aims at producing higher yield of gaseous unsaturated hydrocarbons and aromatics like benzene & toluene?

A. Reforming
B. Pyrolysis
C. Alkylation
D. Hydrocracking

View Answer

Question 220

Octane number of gasoline is a measure of its

A. resistance to knock.
B. ignition delay.
C. ignition temperature.
D. smoke point.

View Answer

Question 221

Name the hydrocarbon having the poorest oxidation stability.

A. Naphthene
B. Olefin
C. Paraffin
D. Aromatics

View Answer

Question 222

Aromatics have the highes __________ of all the hydrocarbons of same carbon atoms.

A. Smoke point
B. Octane number
C. Cetane number
D. Viscosity

View Answer

Question 223

Solvent used in duo-sol extraction for lube oil upgradation is a mixture of

A. propane & phenol-cresol mixture.
B. methyl ethyl ketone & glycol.
C. phenol & furfural.
D. propane & liquid sulphur dioxide.

View Answer

Question 224

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.

View Answer

Question 225

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

View Answer

Question 226

__________ chloride present in crude petroleum as impurity is the most prolific producer of HCl during distillation.

A. Magnesium
B. Potassium
C. Calcium
D. Sodium

View Answer

Question 227

Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency?

A. Paraffins
B. Naphthenes
C. Aromatics
D. Iso-paraffins

View Answer

Question 228

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

View Answer

Question 229

__________ test is done to find out the softening point of bitumen.

A. Impact
B. Ball and ring
C. Flame
D. Viscosity

View Answer

Question 230

Alkylation

A. Causes olefins to combine with each other
B. Causes olefins to combine with iso-paraffins
C. Converts iso-paraffin into olefin
D. Converts olefin into paraffin

View Answer

Question 231

Pick out the undesirable property for a solvent meant for dewaxing of lube oil.

A. Complete miscibility with oil
B. High solubility of wax in the solvent
C. Both A & B
D. Neither A nor B

View Answer

Question 232

Presence of sulphur in gasoline

A. Leads to corrosion
B. Increases lead susceptibility
C. Decreases gum formation
D. Helps during stabilisation

View Answer

Question 233

Catalyst used in catalytic polymerisation which produces polymer gasoline is

A. H₂SO₄
B. H₃PO₄
C. Both A & B
D. AlCl3

View Answer

Question 234

Which of the following has the highest octane number?

A. Aromatics
B. I-paraffins
C. Naphthenes
D. Olefins

View Answer

Question 235

Catalyst used in isomerisation process is

A. H₂SO₄
B. H₃PO₄
C. HF
D. AlCl3

View Answer

Question 236

The most suitable solvent for deasphalting vacuum residue is

A. Propane
B. Methyl ethyl ketone
C. Doctor's solution
D. Methanol amine

View Answer

Question 237

Pick out the undesirable property for a solvent meant for dewaxing of lube oil.

A. Complete miscibility with oil.
B. High solubility of wax in the solvent.
C. Both (a) and (b).
D. Neither (a) nor (b).

View Answer

Question 238

Deoiling is the process of removal of oil from wax. It is done by the __________ process.

A. Solvent extraction
B. Sweating
C. Resettling
D. All of the above

View Answer

Question 239

The condesate obtained on compression of wet natural gas is termed as

A. Liquefied natural gasoline
B. Natural gasoline
C. Liquid natural gas
D. None of these

View Answer

Question 240

Solution used in Doctor's treatment for the removal of mercaptans is

A. sodium hydroxide
B. sodium plumbite
C. cupric chloride
D. potassium isobutyrate

View Answer

Question 241

Naphthenic acid is a/an __________ compound.

A. Sulphur
B. Nitrogen
C. Oxygen
D. None of these

View Answer

Question 242

Road grade bitumen is produced from vacuum residue by its

A. Aeration
B. Pyrolysis
C. Hydrogenation
D. Steam reforming

View Answer

Question 243

Ethyl mercaptan is a/an __________ compound.

A. Sulphur
B. Nitrogen
C. Oxygen
D. None of these

View Answer

Question 244

Which is the most effective catalyst used in catalytic cracking of petroleum products?

A. Iron oxide
B. Nickel
C. Vanadium pentoxide
D. Zeolite

View Answer

Question 245

Flash point of an oil is determined by the

A. Pensky Martens apparatus
B. Ramsbottom apparatus
C. Saybolt viscometer
D. Conradson apparatus

View Answer

Question 246

Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C ?

A. Naphtha
B. Petrol
C. Kerosene
D. Heavy fuel oil

View Answer

Question 247

In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones.

A. sulphur increases
B. sulphur decreases
C. nitrogen decreases
D. none of these

View Answer

Question 248

Higher vapour pressure of gasoline indicates

A. Low flash point
B. High breathing loss
C. Both A & B
D. Neither A nor B

View Answer

Question 249

Catalytic desulphurisation process used for sweetening of straight run gasoline and kerosene uses __________ as catalyst.

A. Bauxite
B. Fuller's earth
C. Activated clay
D. All of the above

View Answer

Question 250

Molecular weight of crude oil is in the range of

A. 100-120
B. 230-250
C. 450-550
D. 600-850

View Answer

Question 251

Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of

A. Propane & butane
B. Butane & ethane
C. Methane & ethane
D. Methane & carbon monoxide

View Answer

Question 252

Mercaptans are

A. Low boiling sulphur compounds
B. Added in LPG cylinders to detect gas leakage by its smell
C. Undesirable in petrol, as they reduce its octane number
D. All of the above

View Answer

Question 253

LSHS is a type of furnace oil, which

A. Is more viscous than high viscosity furnace oil (HVFO)
B. Stands for low sulphur heavy stock
C. Is an ideal fuel for metallurgical furnaces due to its lower sulphur content (< 1%)
D. All of the above

View Answer

Question 254

Which is the most undesirable component in kerosene?

A. Aromatics
B. I-paraffins
C. N-paraffins
D. Naphthenes

View Answer

Question 255

Doctor's solution used for sweetening of petroleum products is

A. Sodium plumbite
B. Sodium sulphite
C. Sodium thiosulphate
D. Lead sulphate

View Answer

Question 256

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

View Answer

Question 257

Increase in the specific gravity of petroleum products indicates

A. Decrease in paraffin content
B. Increase in thermal energy per unit weight
C. Increase in aromatic content
D. Higher H/C ratio

View Answer

Question 258

Char value of Kerosene is the amount of charred oil deposition on the wick obtained after burning it in a standard wick lamp at a standard rate for 24 hours. Char value of a good quality kerosene should be less than __________ mg/kg of kerosene.

A. 1
B. 20
C. 100
D. 500

View Answer

Question 259

Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater.

A. electric immersion
B. pipestill
C. steam coil
D. none of these

View Answer

Question 260

Cetane number of a diesel fuel is the measure of its

A. Ignition delay
B. Smoke point
C. Viscosity
D. Oxidation stability

View Answer

Question 261

Gum formation in stored gasoline is mainly due to the

A. Alkylation of unsaturates
B. Presence of sulphur
C. Oxidation & polymerisation of unsaturates
D. Higher aromatic content

View Answer

Question 262

Sweetening of petroleum product means the removal of

A. Sulphur & its compounds
B. Water
C. Organic impurities
D. Wax

View Answer

Question 263

Aromatics are desired constituents of

A. Lubricating oil
B. Diesel
C. Kerosene
D. Petrol

View Answer

Question 264

Platforming is a __________ process.

A. Moving bed
B. Fluidised bed
C. Non-regenerative & fixed bed
D. Regenerative

View Answer

Question 265

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

View Answer

Question 266

Choose the correct statement regarding thermal cracking.

A. Moderate changes in operating temperature does not change the depth of cracking
B. Increased residence time results in the decreased severity of cracking
C. At low pressure, the yield of lighter hydrocarbons are more
D. Greater depth of cracking gives lower octane number gasoline

View Answer

Question 267

Older crude petroleum

A. Is light and better
B. Gives more distillates
C. Gives less tar
D. All of the above

View Answer

Question 268

Stabilisation of gasoline (petrol) means

A. Removal of dissolved gases from it
B. Increasing its oxidation stability
C. Improving its lead susceptibility
D. Increasing its vapour pressure

View Answer

Question 269

Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octance is chemically known as

A. α-methyl naphthalene
B. 2-2-4 tri methyl pentane
C. 1, 3 butadiene
D. Tetra methyl ethylene

View Answer

Question 270

The main aim of cracking is to produce

A. Gasoline
B. Lube oil
C. Petrolatum
D. Coke

View Answer

Question 271

Extractor temperature is maintained at -20°C in Edeleanu process to reduce the __________ of kerosene.

A. Smoke point
B. Paraffins
C. Aromatics
D. Naphthenes

View Answer

Question 272

Pick out the correct statement about catalytic polymerisation.

A. H₂SO₄ polymerisation process gives gasoline rich in unsaturates
B. In H₂SO₄ polymerisation, H₃PO₄ is always used with 2% steam to prevent meta & ortho H₃PO₄ formation, which are inactive
C. Both A & B
D. Neither A nor B

View Answer

Question 273

Visbreaking process is used mainly for making

A. high cetane diesel
B. high octane gasoline
C. fuel oil
D. smoke free kerosene

View Answer

Question 274

Deoiling of wax is done by its

A. Heating
B. Cooling
C. Solvent extraction
D. Both B & C

View Answer

Question 275

Clay treatment of petroleum products

A. Decolorises & stabilises cracked gasoline
B. Desulphurise straight run gasoline & kerosene
C. Adsorb arsenic from feedstock to catalytic reforming
D. All of the above

View Answer

Question 276

Diesel index.(an alternative index for expressing the quality of diesel) is

A. determined by using a test engine.
B. not related to aniline point.
C. equal to cetane number plus 3.
D. all (a), (b) & (c).

View Answer

Question 277

Thermofer catalytic cracking process is a __________ process.

A. Fixed bed
B. Moving bed
C. Fluidised bed
D. Non-catalytic

View Answer

Question 278

Pour point of a petrofuel is

A. Multiple of 3°F
B. Multiple of 5°F
C. 5°C below the temperature at which oil ceases to flow
D. None of these

View Answer

Question 279

Which of the following reactions is undesirable in the production of catalytically reformed gasoline?

A. Dehydrogenation of naphthene
B. Dehydrogenation of lower paraffins
C. Dehydrocyclisation of higher paraffins
D. Isomerisation of paraffins

View Answer

Question 280

Crude topping column operates at __________ pressure.

A. Atmospheric
B. 10 atm
C. Vacuum
D. 3 atm

View Answer

Question 281

Pick out the wrong statement.

A. A pale color of petroleum product indicates lower viscosity
B. Color of petroleum products indicates the degree of refinement
C. Lighter petroleum distillates are lighter in color than the heavier residual oils
D. Flouroscene of oils helps to detect its adulteration

View Answer

Question 282

Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke?

A. Naphtha
B. Vacuum residue
C. Light gas oil
D. Diesel

View Answer

Question 283

Name the endothermic reaction out of the following:

A. Catalytic cracking
B. Hydrocracking
C. Dehydrogeneration of naphthene to produce aromatic
D. Catalytic polymerisation

View Answer

Question 284

Molecular weight of crude petroleum may be around

A. 50
B. 250
C. 1500
D. 5000

View Answer

Question 285

95% (by volume) of LPG at 760 mm Hg pressure will evaporate at __________ °C.

A. 2
B. -40
C. 30
D. 55

View Answer

Question 286

In sweetening process, solutizer agent used with caustic alkali is

A. Potassium isobutyrate
B. Sodium plumbite
C. Methanol
D. Phenol

View Answer

Question 287

Aniline point is the

A. Characteristic property of diesel & lubricating oils
B. Measure of aromatic content of oil
C. Both A & B
D. Neither A nor B

View Answer

Question 288

Molecular weight of petrol may be about

A. 40-60
B. 100-130
C. 250-300
D. 350-400

View Answer

Question 289

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

View Answer

Question 290

Gasoline yield in catalytic reforming of naphtha may be about __________ percent by weight.

A. 85
B. 65
C. 50
D. 98

View Answer

Question 291

Which of the following is a non-regenerative fixed bed catalytic reforming process?

A. Hydroforming
B. Thermofer catalytic reforming
C. Platforming
D. Hyperforming

View Answer

Question 292

Natural gasoline is produced

A. From oil wells
B. In oil refineries
C. By natural gas stripping
D. None of these

View Answer

Question 293

Pyrolysis of kerosene or natural gasoline is done to produce mainly the

A. Olefins and aromatics
B. Lighter paraffins
C. Stabilised gasoline
D. Diesel

View Answer

Question 294

Crude oil is pumped by a __________ pump.

A. gear
B. centrifugal
C. screw
D. reciprocating

View Answer

Question 295

Lane and Garton classification of petroleum is based on its

A. Composition
B. Specific gravity
C. Optical properties
D. Viscosity

View Answer

Question 296

A good lubricant should have high

A. viscosity index
B. volatility
C. pour point
D. none of these

View Answer

Question 297

Operating temperature and pressure in catalytic reforming is about

A. 1-5 Kgf/cm² & 200°C
B. 15-45 Kgf/cm² & 450-550°C
C. 50 - 75 kgf/cm² & 600 - 800°C
D. 5-10 kgf/cm² & 150 - 250°C

View Answer

Question 298

Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol.

A. waxes
B. mercaptans
C. asphalt
D. diolefins

View Answer

Question 299

Flash point of atmospheric distillation residue is determined by __________ apparates.

A. Pensky-Martens (closed cup type)
B. Abel
C. Cleveland (open cup type)
D. None of these

View Answer

Question 300

__________ is not an important refinery process for upgrading the quality of lubricating oil.

A. Deoiling
B. Solvent refinning
C. Clay treatment
D. Hydrotreatment

View Answer

Question 301

Reforming

A. Uses naphtha as feedstock
B. Does not much affect the molecular weight of the feed
C. Improves the quality & yield of gasoline
D. All of the above

View Answer

Question 302

Viscosity index of a lubricating oil

A. Is the measure of its flash point
B. Is the measure of variation of viscosity with temperature
C. Should be low
D. None of these

View Answer

Question 303

Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners?

A. PCM
B. Tar
C. Light diesel oil
D. Low viscosity furnace oil

View Answer

Question 304

Which of the following processes is used for the production of petroleum coke?

A. Stabilisation
B. Visbreaking
C. Cracking
D. Reforming

View Answer