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Chemical Engineering
Petroleum Refinery Engineering
Quiz 2
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Q.1
Smoke point of kerosene expresses its
Burning characteristics
Luminosity characteristics
Aromatic content directly
Lamp wick wetting characteristics
Q.2
A good lubricant should have high
Viscosity index
Volatility
Pour point
None of these
Q.3
Flash point of an oil gives an idea of the
Nature of boiling point diagram of the system
Amount of low boiling fraction present
Explosion hazards
All of the above
Q.4
Flash point of an oil is determined by the
Pensky Martens apparatus
Ramsbottom apparatus
Saybolt viscometer
Conradson apparatus
Q.5
Cetane number of high speed diesel must be?
30
45
75
95
Q.6
The yield of straight run LPG from crude oil is about __________ weight percent.
20-25
1-1.5
10-15
0.1-0.2
Q.7
Sulphuric acid treatment of petroleum products removes the __________ materials.
Gum forming
Color forming
Asphaltic
All of the above
Q.8
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 ?
Naphtha
Petrol
Kerosene
Heavy fuel oil
Q.9
Higher vapour pressure of gasoline indicates
Low flash point
High breathing loss
Both A & B
Neither A nor B
Q.10
Which of the following processes is used for the production of petroleum coke?
Stabilisation
Visbreaking
Cracking
Reforming
Q.11
Mercapsol and Unisol processes are meant for the
Dearomatisation of kerosene
Removal of mercaptans
Dewaxing
Decoloration
Q.12
Older crude petroleum
Is light and better
Gives more distillates
Gives less tar
All of the above
Q.13
In sweetening process, solutizer agent used with caustic alkali is
Potassium isobutyrate
Sodium plumbite
Methanol
Phenol
Q.14
In catalytic alkylation, higher iso-butane to olefin ratio gives
Low final boiling point product
Higher yield
Both A & B
Neither A nor B
Q.15
Natural gasoline is produced
From oil wells
In oil refineries
By natural gas stripping
None of these
Q.16
Pour point and freezing point is equal for
Petrol
Diesel
Water
Crude petroleum
Q.17
Which of the following is the most widely used cracking process in oil refineries?
Dubbs process
T.C.C. moving bed process
Fluidised bed catalytic cracking process
Houdry's fixed bed process
Q.18
Which of the following tests is not done for transformer oil?
Flash point and acid value
Aniline point
Dielectric strength
Copper strip corrosion test
Q.19
Aniline point is the temperature at which
Equal weight of diesel & the aniline are completely miscible
Equal weight of aniline & the test sample are completely miscible
Equal volume of aniline & the test sample are completely miscible
Aniline vaporises
Q.20
Aromatics have the highes __________ of all the hydrocarbons of same carbon atoms.
Smoke point
Octane number
Cetane number
Viscosity
Q.21
Thermofer catalytic cracking process is a __________ process.
Fixed bed
Moving bed
Fluidised bed
Non-catalytic
Q.22
The order of preference for feedstock to a catalytic reformer is
Catalytic naphtha - coking naphtha - virgin naphtha
Coking naphtha - virgin naphtha - catalytic naphtha
Virgin naphtha - catalytic naphtha - coking naphtha
Virgin naphtha - coking naphtha - catalytic naphtha
Q.23
Visbreaking
Uses natural gas as feed
Is carried out at atmospheric pressure
Produces fuel oil of lower viscosity
Produces gasoline only
Q.24
Smoke volatility index is equal to smoke point plus
0.42 x(% distilled at 204°C)
5 mm
0.84 x (% distilled at 204°C)
10 mm. approximately
Q.25
Catalyst used in catalytic reforming is
Platinum on alumina
Nickel
Iron
Aluminium chloride
Q.26
Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol.
Waxes
Mercaptans
Asphalt
Diolefins
Q.27
The general formula of naphthenes is
C
n
H
2n + 2
C
n
H
2n - 6
(where, n ≥ 6)
C
n
H
n - 4
Same as that for olefins i.e. C
n
H
2n
Q.28
Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater.
Electric immersion
Pipestill
Steam coil
None of these
Q.29
Choose the correct statement regarding thermal cracking.
Moderate changes in operating temperature does not change the depth of cracking
Increased residence time results in the decreased severity of cracking
At low pressure, the yield of lighter hydrocarbons are more
Greater depth of cracking gives lower octane number gasoline
Q.30
Solvent used in Edeleanu process is
Furfural
Propane
Liquid SO₂
Phenol
Q.31
Antioxidants are added in petrol to
Impart colour to it, for easy identification
Minimise the gum formation
Prevent icing of the carburettor
Prevent the lead build up in engines
Q.32
Solvent used for dewaxing of petroleum products are
Furfural
Methyl ethyl ketone (MEK)
Propane
Both B & C
Q.33
The terminology used for the bottom most product from the vacuum crude distillation unit is
Residual crude
Residuum
Reduced crude
Petrolatum
Q.34
Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the
Elimination of solvent drying facility
Higher nitration temperature
Lower solvent dilution ratio
All of the above
Q.35
Casing head gasoline is the liquid
Butane
Propane
Natural gas
Gasoline separated from wet natural gas by compression
Q.36
Which of the following is a naphthene?
Butene
Butadiene
Cyclohexane
Acetylene
Q.37
Pick out the correct statement pertaining to catalytic cracking.
With increase in the reactor pressure, octane number of gasoline decreases
With increase in the reactor temperature, gasoline yield decreases for a given conversion
Percentage conversion increases with increase in the catalyst to oil ratio
All of the above
Q.38
Which of the following is the most important property for a jet fuel?
Cloud point
Pour point
Colour
Freezing point
Q.39
Which of the following theories of origin of petroleum does not explain the presence of nitrogen & sulphur compounds in crude oil?
Modern theory
Carbide theory
Engler theory
All of the above
Q.40
Petroleum coke is used mainly in the
Discoloration of yellow glycerine
Sugar refining
Manufacture of carbon electrode
Blast furnace for reduction of iron ore
Q.41
Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about __________ ppm.
1
50
5000
10000
Q.42
Electrical desalting of crude oil removes the __________ impurities.
Oleophilic
Oleophobic
Both A & B
Neither A nor B
Q.43
In solutizer sweetening process, solutizer solution used is
Methanol in Unisol process
Naphthenic acid in Mercapsol process
Both A & B
Neither A nor B
Q.44
Higher pressure in the reforming reactor
Increases coke formation
Increases the rate of reaction
Produces high octane number gasoline
None of these
Q.45
Bottom product of atmospheric pressure crude oil distillation column is termed as
Reduced crude
Heavy ends
Asphalt
Residuum
Q.46
Which of the following has the lowest viscosity (at a given temperature) of all?
Naphtha
Kerosene
Diesel
Lube oil
Q.47
Hydrofining is the most recent and effective method for the
Removal of sulphur
Improvement of smoke point
Reduction of breathing loss
Improvement of viscosity index
Q.48
Which is the most desirable component of a good quality kerosene?
I-paraffins
Aromatics
N-paraffins
Naphthenes
Q.49
Which of the following has the lowest flash point of all?
Diesel
Kerosene
Petrol
Furnace oil
Q.50
Feedstock for the production of biodiesel is
Herbal plants
Used vegetable oils
LSHS
Bagasse
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