Latest Petroleum Engineering Objective Questions Part – 3
Q – 216 Flash point of an oil is determined by the
A. Pensky Martens apparatus.
B. Ramsbottom apparatus.
C. Saybolt viscometer.
D. Conradson apparatus.
Ans- Option A
Q – 217 Butadiene is a/an
A. di-olefin
B. naphthene
C. aromatic
D. olefin
Ans- Option A
Q – 218 Catalyst used in catalytic polymerisation which produces polymer gasoline is
A. H2SO4
B. H3PO4
C. both (a) and (b)
D. AlCl3
Ans- Option C
Q – 219 Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its
A. molecular weight
B. aromatics content
C. both a & b
D. neither a nor b
Ans- Option C
Q – 220 Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely mis-cible. It means that the aniline point of the diesel is __________ the room temperature.
A. more than
B. less than
C. same as
D. either more or less; depends on the room temperature
Ans- Option C
Q – 221 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.
Ans- Option B
Q – 222 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
Ans- Option B
Q – 223 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
A. elimination of solvent drying facility.
B. higher nitration temperature.
C. lower solvent dilution ratio.
D. all (a), (b) & (c).
Ans- Option D
Q – 224 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
Ans- Option C
Q – 225 Electrical desalting of crude oil removes the __________ impurities.
A. oleophilic
B. oleophobic
C. both (a) and (b)
D. neither (a) nor (b)
Ans- Option B
Q – 226 Petrolatum is
A. same as petroleum ether.
B. petroleum coke.
C. a mixture of microcrystalline wax in viscous hydrocarbon liquids.
D. none of these.
Ans- Option C
Q – 227 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’
Ans- Option B
Q – 228 Molecular weight of crude petroleum may be around
A. 50
B. 250
C. 1500
D. 5000
Ans- Option C
Q – 229 Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about __________ C.
A. 50
B. 70
C. 90
D. 140
Ans- Option C
Q – 230 Deoiling of wax is done by its
A. heating
B. cooling
C. solvent extraction
D. both(b)&(c)
Ans- Option D
Q – 231 The most widely used crude topping column in refineries is the __________ column.
A. bubble-cap
B. packed bed
C. fluidised bed
D. perforated plate
Ans- Option A
Q – 232 Solvent used for dewaxing of petroleum products are
A. furfural
B. methyl ethyl ketone (MEK)
C. propane
D. both(b)&(c)
Ans- Option C
Q – 233 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
Ans- Option C
Q – 234 The average boiling point of aviation turbine fuel is closest to that of
A. lubricating oils
B. LPG
C. diesel
D. Kerosene
Ans- Option D
Q – 235 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
Ans- Option B
Q – 236 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.
Ans- Option B
Q – 237 Which of the following is desirable in diesel and kerosene but is undersirable in gasoline?
A. Aromatics
B. Mercaptans
C. Paraffins
D. Naphthenic acid
Ans- Option A
Q – 238 Olefins are
A. saturated hydrocarbons.
B. unsaturated cyclic compounds (hydrocarbons).
C. present in substantially good quantity in crude petroleum.
D. none of these.
Ans- Option D
Q – 239 The first crude oil refinery of India is located at
A. Naharkatiya
B. Digboi
C. Kochin
D. Madras
Ans- Option B
Q – 240 Name the hydrocarbon having the poorest oxidation stability.
A. naphthene
B. olefin
C. paraffin
D. aromatics
Ans- Option D
Q – 241 Testing of the knocking characteristics of petrofuels is done in a __________ engine.
A. Carnot
B. CFR (Co-operative fuel research)
C. Stirling
D. diesel
Ans- Option B
Q – 242 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.
Ans- Option A
Q – 243 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.
Ans- Option B
Q – 244 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.
Ans- Option B
Q – 245 Octane number of gasoline produced by two stage fluidised catalytic cracking process is
A. 80
B. 87
C. 92
D. 97
Ans- Option D
Q – 246 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
Ans- Option A
Q – 247 Feedstock for the production of biodiesel is
A. herbal plants
B. used vegetable oils
C. LSHS
D. bagasse
Ans- Option B
Q – 248 Pick out the wrong statement.
A. Iso-paraffin crack faster than n-paraf-fin.
B. Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic.
C. Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking.
D. None of these.
Ans- Option B
Q – 249 Which one is used to determine the colour of petroleum products?
A. Colour comparator
B. Saybolt chromometer
C. Cleveland apparatus
D. None of these
Ans- Option A
Q – 250 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.
Ans- Option A
Q – 251 Glycol added to petrol acts as a/an __________ agent.
A. anti-knocking
B. anti-icing
C. anti-gum forming
D. dewaxing
Ans- Option B
Q – 252 Naphthenic acid is a/an __________ compound.
A. sulphur
B. nitrogen
C. oxygen
D. none of these
Ans- Option C
Q – 253 Which is almost absent in crude petroleum?
A. Olefins
B. Mercaptans
C. Naphthenes
D. Cycloparaffins
Ans- Option B
Q – 254 A typical yield of diesel in straight run distillation of crude oil may be about __________ percent.
A. 8
B. 18
C. 28
D. 35
Ans- Option A
Q – 255 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.
Ans- Option D
Q – 256 Presence of aromatics in
A. diesel increases its cetane number.
B. kerosene increases its smoke point.
C. petrol increases its octane number.
D. all (a), (b) and (c).
Ans- Option C
Q – 257 The solvent used in Barisol dewaxing process is
A. hexane
B. furfural
C. benzol and ethylene dichloride
D. methyl ethyl ketone (MEK)
Ans- Option C
Q – 258 Petroleum liquid fuels having flash point greater than 66C is considered as safe during storage and handling. Which of the following has flash point > 66C?
A. Naphtha
B. Petrol
C. Kerosene
D. Heavy fuel oil
Ans- Option D
Q – 259 Catalyst used in the catalytic polymerisation is
A. phosphoric acid on kieselghur
B. aluminium chloride
C. nickel
D. vanadium pentaoxide
Ans- Option A
Q – 260 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.
Ans- Option C
Q – 261 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
Ans- Option A
Q – 262 The characterisation factor of crude petroleum oil is around
A. 3
B. 11
C. 22
D. 28
Ans- Option B
Q – 263 Which of the following has the highest flash point of all?
A. Diesel
B. Kerosene
C. Petrol
D. Furnace oil
Ans- Option D
Q – 264 ‘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
Ans- Option B
Q – 265 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
Ans- Option B
Q – 266 The main aim of cracking is to produce
A. gasoline
B. lube oil
C. petrolatum
D. coke
Ans- Option A
Q – 267 Sour crude means the __________ bearing crude.
A. asphalt
B. sulphur compounds
C. wax
D. nitrogen compounds
Ans- Option B
Q – 268 Hydrocracking employs
A. high pressure & temperature.
B. low pressure & temperature.
C. high pressure and low temperature.
D. high temperature and low pressure.
Ans- Option A
Q – 269 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
Ans- Option D
Q – 270 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.
Ans- Option B
Q – 271 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.
Ans- Option C
Q – 272 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.
Ans- Option D
Q – 273 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
Ans- Option A
Q – 274 Cetane number of alpha methyl naphthalene is assumed to be
A. 0
B. 100
C. 50
D. ∞
Ans- Option A
Q – 275 Visbreaking
A. uses natural gas as feed
B. is carried out at atmospheric pressure
C. produces fuel oil of lower viscosity
D. produces gasoline only
Ans- Option C
Q – 276 Flash point of diesel/kerosene (>50C) is determined by the
A. Abel apparatus
B. Pensky-Martens apparatus
C. Saybolt chromometer
D. none of these
Ans- Option A
Q – 277 Quinoline is a/an __________ compound.
A. sulphur
B. nitrogen
C. oxygen
D. none of these
Ans- Option B
Q – 278 Which of the following processes is used for the production of petroleum coke?
A. Stabilisation
B. Visbreaking
C. Cracking
D. Reforming
Ans- Option C
Q – 279 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.
Ans- Option A
Q – 280 Smoke point of a good burning kerosene may be around __________ mm.
A. 0-5
B. 20-25
C. 60-75
D. 100-120
Ans- Option B
Q – 281 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
Ans- Option B
Q – 282 Which of the following is a naphthene?
A. Butene
B. Butadiene
C. Cyclohexane
D. Acetylene
Ans- Option C
Q – 283 Pick out the correct statement pertaining to catalytic cracking.
A. With increase in the reactor pressure, octane number of gasoline decreases.
B. With increase in the reactor temperature, gasoline yield decreases for a given conversion.
C. Percentage conversion increases with increase in the catalyst to oil ratio.
D. all (a), (b) and (c)
Ans- Option D
Q – 284 Feedstock for polymerisation is
A. naphtha.
B. cracked gases rich in C2 & C4 olefins.
C. low boiling aromatics.
D. none of these.
Ans- Option B
Q – 285 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
Ans- Option A
Q – 286 Octane number (unleaded) of gasoline produced by isomerisation of butane may be about
A. 45
B. 55
C. 70
D. 90
Ans- Option C
Q – 287 Crude topping column operates at __________ pressure.
A. atmospheric
B. 10 atm
C. vacuum
D. 3 atm.
Ans- Option A
Q – 288 Aromatics are desired constituents of
A. lubricating oil
B. diesel
C. kerosene
D. petrol
Ans- Option D
Q – 289 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.
Ans- Option D
Q – 290 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
Ans- Option A
Q – 291 Hydrogen percentage (by weight) in crude petroleum may be about
A. 5
B. 15
C. 25
D. 35
Ans- Option B
Q – 292 The coking process normally mostly used in Indian oil refineries is the __________ coking process.
A. delayed
B. flexi
C. fluid
D. contact
Ans- Option A
Q – 293 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
Ans- Option C
Q – 294 Illuminating characteristics of kerosene is expressed by its
A. smoke point
B. aniline point
C. luminosity number
D. aromatic content
Ans- Option C
Q – 295 Furfural solvent extraction is used for upgrading (by dissolving aromatics)
A. naphtha
B. lubricating oils
C. wax
D. cracking feedstock
Ans- Option B
Q – 296 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)
Ans- Option A
Q – 297 The octane number of aviation gasoline may be
A. 79
B. 87
C. 97
D. >100
Ans- Option D
Q – 298 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.
Ans- Option C
Q – 299 __________ converts n-paraffins to i-paraffins.
A. Alkylation
B. Polymerisation
C. Isomerisation
D. none of these
Ans- Option C
Q – 300 Flash point of motor gasoline may be around __________ C.
A. 10
B. 45
C. 100
D. 150
Ans- Option B
Q – 301 Solution used in Doctor’s treatment for the removal of mercaptans is
A. sodium hydroxide
B. sodium plumbite
C. cupric chloride
D. potassium isobutyrate
Ans- Option B
Q – 302 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)
Ans- Option D
Q – 303 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
Ans- Option A
Q – 304 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.
Ans- Option D
Q – 305 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.
Ans- Option A
Q – 306 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)
Ans- Option D
Q – 307 Which of the following has the lowest viscosity (at a given temperature) of all?
A. Naphtha
B. Kerosene
C. Diesel
D. Lube oil
Ans- Option A
Q – 308 __________ determination is not a very significant and important test for gasoline.
A. Gum & sulphur content
B. Viscosity
C. Octane number
D. Reid vapor pressure
Ans- Option B
Q – 309 __________ test is done to find out the softening point of bitumen.
A. Impact
B. Ball and ring
C. Flame
D. Viscosity
Ans- Option B
Q – 310 Cetane number of diesel used in trucks may be about
A. 50
B. 14
C. 35
D. 85
Ans- Option A
Q – 311 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
Ans- Option B
Q – 312 Catalyst used in catalytic reforming is
A. platinum on alumina
B. nickel
C. iron
D. aluminium chloride
Ans- Option A
Q – 313 Pick out the additive property of a lube oil out of following.
A. API gravity
B. Specific gravity
C. Viscosity
D. Flashpoint
Ans- Option A
Q – 314 Octane number of gasoline is a measure of its
A. resistance to knock.
B. ignition delay.
C. ignition temperature.
D. smoke point.
Ans- Option A
Q – 315 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).
Ans- Option C
Q – 316 In petroleum refining, the process used for conversion of hydrocarbons to aromatics is
A. catalytic cracking
B. catalytic reforming
C. hydrotreating
D. alkylation
Ans- Option B
Q – 317 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.
Ans- Option A
Q – 318 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.
Ans- Option C
Q – 319 Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol.
A. waxes
B. mercaptans
C. asphalt
D. diolefins
Ans- Option B
Q – 320 A good lubricant should have high
A. viscosity index
B. volatility
C. pour point
D. none of these
Ans- Option A
Q – 321 Solvent used in the deasphalting process is
A. furfurol
B. phenol
C. propane
D. hexane
Ans- Option C
Q – 322 Crude oil is pumped by a __________ pump.
A. gear
B. centrifugal
C. screw
D. reciprocating
Ans- Option B
Q – 323 Operating condition in the electrical dehydrators for crude oil is about
A. 6.5 kgf/Cm2 & 95C.
B. 1 atm. & 110 C.
C. 20 kgf/cm2 & 110C.
D. 50 atm. and 150C.
Ans- Option A
Q – 324 Visbreaking process is used mainly for making
A. high cetane diesel
B. high octane gasoline
C. fuel oil
D. smoke free kerosene
Ans- Option C
Q – 325 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.
Ans- Option B
Q – 326 __________ is not an important refinery process for upgrading the quality of lubricating oil.
A. Deoiling
B. Solvent refinning
C. Clay treatment
D. Hydrotreatment
Ans- Option A
Q – 327 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
Ans- Option C
Q – 328 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).
Ans- Option C
Q – 329 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)
Ans- Option D
Q – 330 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
Ans- Option B
Q – 331 Casing head gasoline is the liquid
A. butane.
B. propane.
C. natural gas.
D. gasoline separated from wet natural gas by compression.
Ans- Option A
Q – 332 Pour point and freezing point is equal for
A. petrol
B. diesel
C. water
D. crude petroleum
Ans- Option C
Q – 333 Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about
A. 0.1
B. 1
C. 2.5
D. 3.5
Ans- Option B
Q – 334 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.
Ans- Option C
Q – 335 For gasoline, the flash point (<50C) is determined by the
A. Abel apparatus.
B. Pensky-Marten’s apparatus.
C. Saybolt chromometer.
D. none of these.
Ans- Option D
Q – 336 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
Ans- Option C
Q – 337 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.
Ans- Option A
Q – 338 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 paraffin’s 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.
Ans- Option B
Q – 339 Which is the most undesirable component in kerosene?
A. Aromatics
B. i-paraffins
C. n-paraffins
D. Naphthenes
Ans- Option A
Q – 340 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.
Ans- Option B
Q – 341 Diesel used in naval applications has a minimum cetane number of
A. 25
B. 35
C. 45
D. 65
Ans- Option C