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

Maintain the reaction temperature

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

May be either more or less than

Converts iso-paraffin into olefin

Causes olefins to combine with each other

Causes olefins to combine with iso-paraffins

Converts iso-paraffin into olefin

Aniline point is the$?

Characteristic property of diesel & lubricating oils

Measure of aromatic content of oil

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

Low final boiling point product

Pour point of a petrofuel is$?

5¬¨‚àûC below the temperature at which oil ceases to flow

Aniline point is the?

Characteristic property of diesel & lubricating oils

Measure of aromatic content of oil

Converts iso-paraffin into olefin

Causes olefins to combine with each other

Causes olefins to combine with iso-paraffins

Converts iso-paraffin into olefin

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

Low final boiling point product

Pour point of a petrofuel is?

5¬¨‚àûC below the temperature at which oil ceases to flow

Mercaptans are added to liquefied petroleum gas (LPG) to?

Narrow down its explosion limit

Assist in checking its leakage from cylinder

Which one is preferred for aircraft engine??

High freezing point aviation fuel

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

CFR (Co-operative fuel research)

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

Explosion hazards characteristics

Nature of boiling point diagram

Added in LPG cylinders to detect gas leakage by its smell

Undesirable in petrol, as they reduce its octane number

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

Enhances the desulphurisation process

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

Water separation characteristics

Water absorbing capacity from atmosphere

281 + Mcqs in Petroleum Refinery Engineering in Chemical Engineering Page 5 McqOptions

201.	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
Answer» D. 60

Discussion

202.	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
Answer» C. Remains same

Discussion

203.	Which of the following is a non-regenerative fixed bed catalytic reforming process?$?
A.	Hydroforming
B.	Thermofer catalytic reforming
C.	Platforming
D.	Hyperforming
Answer» D. Hyperforming

Discussion

204.	Octane number of n-heptane is assumed to be$?
A.	100
B.	0
C.	70
D.	‚Äö√ √ª
Answer» C. 70

Discussion

205.	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
Answer» D. Hydrogenate the feed stock

Discussion

206.	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
Answer» B. Tetramethyllead

Discussion

207.	The reservoir rock containing petroleum has$?
A.	Low porosity
B.	High permeability
C.	High porosity
D.	Both B and C
Answer» E.

Discussion

208.	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
Answer» E.

Discussion

209.	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
Answer» C. Converts iso-paraffin into olefin

Discussion

210.	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
Answer» D. Neither A nor B

Discussion

211.	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
Answer» E.

Discussion

212.	Both asphalt and wax are produced by __________ base crude oils.$?
A.	Naphthenic
B.	Asphalt
C.	Paraffin
D.	Mixed
Answer» E.

Discussion

213.	Visbreaking process is used mainly for making$?
A.	High cetane diesel
B.	High octane gasoline
C.	Fuel oil
D.	Smoke free kerosene
Answer» D. Smoke free kerosene

Discussion

214.	The characterisation factor of a crude oil is calculated as 12.5. It means that; it is$?
A.	Paraffinic
B.	Naphthenic
C.	Intermediate
D.	None of these
Answer» B. Naphthenic

Discussion

215.	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
Answer» B. Higher yield

Discussion

216.	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.	≈í¬±-methyl naphthalene
B.	2-2-4 tri methyl pentane
C.	1, 3 butadiene
D.	Tetra methyl ethylene
Answer» C. 1, 3 butadiene

Discussion

217.	Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO‚Äö√á√á extraction (Edeleanu process), its smoke point may become __________ mm.$?
A.	5
B.	10
C.	25
D.	100
Answer» D. 100

Discussion

218.	Which of the following is not a sulphur compound present in petroleum ?$?
A.	Thiophenes
B.	Mercaptans
C.	Sulphones
D.	Pyroles
Answer» E.

Discussion

219.	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
Answer» C. 250 to 350

Discussion

220.	Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic$?
A.	Cracking
B.	Polymerisation
C.	Reforming
D.	Isomerisation
Answer» D. Isomerisation

Discussion

221.	Pour point of a petrofuel is$?
A.	Multiple of 3¬¨‚àûF
B.	Multiple of 5¬¨‚àûF
C.	5¬¨‚àûC below the temperature at which oil ceases to flow
D.	None of these
Answer» D. None of these

Discussion

222.	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
Answer» C. Dielectric strength

Discussion

223.	Aniline point test of an oil qualitatively indicates the __________ content of an oil.$?
A.	Paraffin
B.	Olefin
C.	Aromatic
D.	Naphthene
Answer» D. Naphthene

Discussion

224.	A typical yield of kerosene in straight run distillation of crude oil may be about __________ percent.?
A.	4
B.	10
C.	18
D.	26
Answer» C. 18

Discussion

225.	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
Answer» E.

Discussion

226.	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
Answer» D. Neither A nor B

Discussion

227.	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
Answer» C. Converts iso-paraffin into olefin

Discussion

228.	Visbreaking process is used mainly for making?
A.	High cetane diesel
B.	High octane gasoline
C.	Fuel oil
D.	Smoke free kerosene
Answer» D. Smoke free kerosene

Discussion

229.	Both asphalt and wax are produced by __________ base crude oils.?
A.	Naphthenic
B.	Asphalt
C.	Paraffin
D.	Mixed
Answer» E.

Discussion

230.	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
Answer» C. Dielectric strength

Discussion

231.	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
Answer» B. Higher yield

Discussion

232.	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.	≈í¬±-methyl naphthalene
B.	2-2-4 tri methyl pentane
C.	1, 3 butadiene
D.	Tetra methyl ethylene
Answer» C. 1, 3 butadiene

Discussion

233.	Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO‚Äö√á√á extraction (Edeleanu process), its smoke point may become __________ mm.?
A.	5
B.	10
C.	25
D.	100
Answer» D. 100

Discussion

234.	Which of the following is not a sulphur compound present in petroleum ??
A.	Thiophenes
B.	Mercaptans
C.	Sulphones
D.	Pyroles
Answer» E.

Discussion

235.	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
Answer» C. 250 to 350

Discussion

236.	Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic?
A.	Cracking
B.	Polymerisation
C.	Reforming
D.	Isomerisation
Answer» D. Isomerisation

Discussion

237.	Pour point of a petrofuel is?
A.	Multiple of 3¬¨‚àûF
B.	Multiple of 5¬¨‚àûF
C.	5¬¨‚àûC below the temperature at which oil ceases to flow
D.	None of these
Answer» D. None of these

Discussion

238.	Aniline point test of an oil qualitatively indicates the __________ content of an oil.?
A.	Paraffin
B.	Olefin
C.	Aromatic
D.	Naphthene
Answer» D. Naphthene

Discussion

239.	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
Answer» D. Increase its calorific value

Discussion

240.	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
Answer» D. Oxygen compounds

Discussion

241.	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
Answer» B. Low viscosity index lube oil

Discussion

242.	Testing of the knocking characteristics of petrofuels is done in a __________ engine.?
A.	Carnot
B.	CFR (Co-operative fuel research)
C.	Stirling
D.	Diesel
Answer» C. Stirling

Discussion

243.	The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg.?
A.	1.2
B.	12
C.	120
D.	700
Answer» D. 700

Discussion

244.	Ethyl mercaptan is a/an __________ compound.?
A.	Sulphur
B.	Nitrogen
C.	Oxygen
D.	None of these
Answer» B. Nitrogen

Discussion

245.	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
Answer» E.

Discussion

246.	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
Answer» E.

Discussion

247.	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
Answer» D. Neither A nor B

Discussion

248.	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
Answer» C. Water content

Discussion

249.	Octane number of gasoline is a measure of its?
A.	Resistance to knock
B.	Ignition delay
C.	Ignition temperature
D.	Smoke point
Answer» B. Ignition delay

Discussion

250.	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» D. Discoloration

Discussion

Explore topic-wise MCQs in Chemical Engineering.

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

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

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

Octane number of n-heptane is assumed to be$?

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

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

The reservoir rock containing petroleum has$?

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

Alkylation$?

Aniline point is the$?

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

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

Visbreaking process is used mainly for making$?

The characterisation factor of a crude oil is calculated as 12.5. It means that; it is$?

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

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$?

Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO‚Äö√á√á extraction (Edeleanu process), its smoke point may become __________ mm.$?

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

Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.$?

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

Pour point of a petrofuel is$?

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

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

A typical yield of kerosene in straight run distillation of crude oil may be about __________ percent.?

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

Aniline point is the?

Alkylation?

Visbreaking process is used mainly for making?

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

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

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

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?

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

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

Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.?

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

Pour point of a petrofuel is?

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

Mercaptans are added to liquefied petroleum gas (LPG) to?

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

Which one is preferred for aircraft engine??

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

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

Ethyl mercaptan is a/an __________ compound.?

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

Mercaptans are?

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

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

Octane number of gasoline is a measure of its?

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?