chemical engineering petroleum refinery engineering Mcqs
251. The catalytic cracking of heavier petroleum fraction is done to produce mainly____________________?
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A. Tar

B. Asphalt

C. Diesel oil

D. Gasoline

252. Waxy crudes are treated with chemical additives mainly to_________________________?
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A. Remove wax

B. Dissolve wax

C. Depress its pour point

D. Precipitate wax

253. Name the endothermic reaction out of the following ?
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A. Catalytic polymerisation

B. Hydrocracking

C. Catalytic cracking

D. Dehydrogeneration of Naphthene to produce aromatic
254. Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency ?
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A. Iso-paraffins

B. Aromatics

C. Naphthenes

D. Paraffins
255. Pick out the wrong statement ?
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A. Hydrocarbons of low specific gravity (e.g., paraffins) possess the maximum thermal energy per unit volume

B. Aromatics have lower specific gravity than corresponding paraffins

C. Higher specific gravity of petroleum products means higher C/H ratio

D. Hydrocarbons of high specific gravity (e.g., aromatics) possess the maximum thermal energy per unit weight

256. The characterisation factor of a crude oil is calculated as 12.5. It means that; it is________________?
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A. Intermediate

B. Naphthenic

C. Paraffinic

D. None of these

257. Pick out the wrong statement ?
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A. Iso-paraffin crack faster than n-paraffin.

B. Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic

C. None of these

D. Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking

258. Diesel index is defined as_________________?
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A. (API) (Aniline Point, F)/100

B. (API) (100)/Aniline Point, C

C. (API) (Aniline Point, C)/100

D. (API) (100)/Aniline Point, F

259. Pick out the wrong statement ?
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A. Fluorescence of oils helps to detect its adulteration

B. Color of petroleum products indicates the degree of refinement

C. Lighter petroleum distillates are lighter in color than the heavier residual oils

D. A pale color of petroleum product indicates lower viscosity
260. Removal of light fractions from crude oil is called its _____________________?
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A. Visbreaking

B. Sweetening

C. Stabilisation

D. Dehydration

261. Mercaptans are________________?
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A. Undesirable in petrol, as they reduce its octane number

B. Added in LPG cylinders to detect gas leakage by its smell

C. All A., B. and C.

D. Low boiling sulphur compounds

262. Bottom product of atmospheric pressure crude oil distillation column is termed as________________?
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A. Residuum

B. Reduced crude

C. Heavy ends

D. Asphalt

263. Which of the following rock favors petroleum formation?
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A. Sedimentary rock

B. None of these

C. Metamorphic rock

D. Igneous rock

264. Aniline point of the diesel is a measure of its ______________ content?
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A. Olefin

B. Aromatic

C. Naphthene

D. Paraffin
265. _____________ determination is not a very significant and important test for gasoline?
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A. Viscosity

B. Octane number

C. Reid vapor pressure

D. Gum & sulphur content

266. Performance number of a liquid fuel is related to its __________________?
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A. Knocking tendency

B. Sulphur content

C. Wax content

D. Spontaneous ignition temperature
267. Pick out the wrong statement?
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A. Multigrade lubricating oils have high viscosity index

B. Naphthenic oil has very low viscosity index

C. Paraffinic oil has very high viscosity index

D. High viscosity index means a large change in viscosity with change in temperature
268. Which one is preferred for aircraft engine ?
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A. High freezing point aviation fuel

B. None of these

C. High viscosity index lube oil

D. Low viscosity index lube oil

269. Pour point and freezing point is equal for__________________?
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A. Petrol

B. Crude petroleum

C. Water

D. Diesel

270. 95% (by volume) of LPG at 760 mm Hg pressure will evaporate at __________ C?
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A. 2

B. -40

C. 30

D. 55

271. A source rock that is too immature to generate petroleum in its natural setting is known as__________?
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A. Effective Source Rock

B. Unconventional Source Rock

C. All of above

D. Potential Source Rock

272. For gasoline, the flash point (<50C) is determined by the______________________?
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A. Saybolt chromometer

B. Abel apparatus

C. None of these

D. Pensky-Martens apparatus

273. Pick out the wrong statement?
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A. Higher specific gravity of petrofuels means higher C/H ratio

B. Aromatics have higher specific gravity than paraffins

C. Heavier petrofuels have higher GCV on weight basis (i.e., Kcal/kg) but lower GCV on volume basis (i.e., Kcal/litre)

D. Gross calorific value (GCV) of petrofuels is equal to (12400 2100 ?2) where, ? is the specific gravity of the fuel at 15.5C

274. Specific gravity of a petroleum product gives an indication of its _________________?
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A. Ease of atomisation

B. Sulphur content

C. Hydrocarbon content type (aromatic or paraffinic)

D. Degree of refinement

275. Crude oil is subjected to vacuum distillation in the last stage, because_________________?
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A. ompose</strong>

B. None of these

C. High purity products can be obtained thereby

D. High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may

E. Lighter/low boiling products are prone to thermal decomposition

276. Straight run petrol as compared to methyl/ethyl alcohol has_________________?
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A. Lower octane number

B. Lower calorific value

C. Higher specific gravity

D. Higher ignition temperature

277. Which of the following has the lowest viscosity (at a given temperature) of all ?
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A. Lube oil

B. Kerosene

C. Naphtha

D. Diesel

278. DLS stands For_______?
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A. Dogleg severity

B. Drill line stream

C. All of Above

D. Drill line system

279. Hydrofining is the most recent and effective method for the____________________ ?
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A. Improvement of viscosity index

B. Removal of sulphur

C. Improvement of smoke point

D. Reduction of breathing loss

280. Maximum use of petroleum coke is in__________________?
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A. Carbon electrode manufacture

B. Adsorption refining operation

C. Iron ore reduction

D. Fuel gas manufacture

281. Catalytic desulphurisation process used for sweetening of straight run gasoline and kerosene uses _______________ as catalyst?
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A. Bauxite

B. All A., B. & C.

C. Activated clay

D. Fullers earth

282. Choose the correct statement ?
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A. The aromatics have lower octane number than naphthenes with same number of carbon atoms

B. Octane number of i-octane is zero

C. Octane number of paraffins increases with increasing number of carbon atoms

D. Branched chain paraffins have higher octane number than straight chain paraffins with same number of carbon atoms

283. The condensate obtained on compression of wet natural gas is termed as__________________?
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A. None of these

B. Natural gasoline

C. Liquefied natural gasoline

D. Liquid natural gas

284. Operating temperature and pressure in catalytic reforming is about_____________?
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A. 5-10 kgf/cm2 & 150 250C

B. 50 75 kgf/cm2 & 600 800C

C. 1-5 Kgf/cm2 & 200C

D. 15-45 Kgf/cm2 & 450-550C
285. Pick out the additive property of lube oil out of following ?
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A. API gravity

B. Specific gravity

C. Flashpoint

D. Viscosity

286. Which of the following has the maximum API gravity of all ?
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A. Kerosene

B. Petrol

C. Furnace oil

D. Diesel

287. Which is the most undesirable component in kerosene ?
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A. Naphthenes

B. n-paraffins

C. Aromatics

D. i-paraffins

288. Catalyst used in the catalytic cracking is_____________________?
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A. Silica-alumina

B. Silica gel

C. Vanadium pentoxide

D. Nickel

289. Catalyst used in the isomerisation is_______________________?
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A. Nickel

B. Alumina

C. Aluminium chloride

D. Phosphoric acid

290. Octane numbers of motor gasoline used in India and America are respectively________________?
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A. 87 & 94

B. 94 & 100

C. 94 & 87

D. 83 & 100

291. Petroleum is believed to have originated from _______________ sources?
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A. Vegetable

B. Animal

C. Both A. and B.

D. Neither A. nor B.

292. Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of _______________?
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A. Propane & butane

B. Methane & ethane

C. Butane & ethane

D. Methane & carbon monoxide

293. LSHS is a type of furnace oil, which_____________________?
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A. Stands for low sulphur heavy stock

B. Is more viscous than high viscosity furnace oil (HVFO)

C. All A., B. and C.

D. Is an ideal fuel for metallurgical furnaces due to its lower sulphur content (< 1%)

294. 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?
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A. 1000-1500

B. 600-750

C. 2000-2500

D. 250-350

295. Operating condition in the electrical dehydrators for crude oil is about____________________?
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A. 1 atm. & 110 C

B. 20 kgf/cm2 & 110C

C. 50 atm. and 150C

D. 6.5 kgf/Cm2 & 95C
296. In the atmospheric pressure crude distillation, the content of _____________ from lighter fraction to heavier ones?
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A. Sulphur increases

B. Nitrogen decreases

C. None of these

D. Sulphur decreases

297. Which of the following fractions of a crude oil will have the maximum gravity API (i.e. API) ?
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A. Vacuum gas oil

B. Atmospheric gas oil

C. Gasoline

D. Diesel

298. In catalytic cracking process, olefins crack ______________ times faster than in thermal cracking process?
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A. 200-300

B. 1000-10000

C. 10

D. 100

299. Stabilisation of gasoline (petrol) means ___________________?
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A. Increasing its vapour pressure

B. Improving its lead susceptibility

C. Increasing its oxidation stability

D. Removal of dissolved gases from it
300. Main constituent of natural gas is___________________?
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A. C2H4

B. C2H2

C. CH4

D. C2H6