chemical engineering petroleum refinery engineering MCQs – Page 12

Practise multiple-choice questions from chemical engineering petroleum refinery engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering petroleum refinery engineering Mcqs
221. Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about_________________?
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A. 2.5

B. 0.1

C. 3.5

D. 1
222. Older crude petroleum __________________?
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A. Gives more distillates

B. All A., B. and C.

C. Gives less tar

D. Is light and better

223. Alkylation_____________________?
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A. Converts olefin into paraffin

B. Converts iso-paraffin into olefin

C. Causes olefins to combine with each other

D. Causes olefins to combine with iso-paraffins
224. Which of the following is desirable in diesel and kerosene but is undesirable in gasoline ?
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A. Aromatics

B. Mercaptans

C. Paraffins

D. Naphthenic acid

225. Antioxidants are added in petrol to _____________________?
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A. Prevent the lead build up in engines

B. Minimise the gum formation

C. Impart colour to it, for easy identification

D. Prevent icing of the carburettor

226. The pressure (kg/cm2) and temperature (C) maintained in electrical desalters for crude oil are respectively__________________?
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A. 50 and 250

B. 10 and 300

C. 10 and 120

D. 1 and 200
227. Fuel oil is subjected to visbreaking to reduce its_______________?
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A. Viscosity

B. All A., B. and C.

C. Pour point

D. Pressure drop on pumping

228. Gasoline extracted from natural gas (by compression and cooling) is called the ___________ gasoline?
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A. Polymer

B. Casing head

C. Unleaded

D. Straight run

229. Crude oil produced by Indian oil fields are predominantly _______________ in nature?
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A. Mixed base

B. Asphaltic

C. Naphthenic

D. Paraffinic

230. Which of the following has the highest octane number ?
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A. Olefins

B. Aromatics

C. Naphthenes

D. i-paraffins

231. Aromatics are desired constituents of____________________?
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A. Kerosene

B. Petrol

C. Diesel

D. Lubricating oil

232. Which of the following has the minimum API gravity of all ?
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A. Diesel

B. Kerosene

C. Petrol

D. Furnace oil
233. Boiling range of motor gasoline is an indication of the ___________________?
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A. Vapour locking tendency

B. All A., B. and C.

C. Rate of acceleration

D. Case of starting

234. CnH2n is the general formula for_______________?
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A. Olefins

B. Naphthenes

C. Both A. and B.

D. Neither A. nor B.

235. Water content in the crude oil as it comes out of oil well may be upto ______________ percent?
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A. 25

B. 5

C. 2

D. 10

236. Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________________ ptb (pounds per thousand barrel) ?
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A. 3

B. 35

C. 0.03

D. 70

237. The main purpose of recycling the byproduct hydrogen gas in the reformer reactor is to ____________________?
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A. Sustain the reactor pressure

B. Obviate catalyst poisoning

C. Maintain the reaction temperature

D. Hydrogenate the feed stock

238. In sweetening process, solutizer agent used with caustic alkali is_______________?
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A. Sodium plumbite

B. Phenol

C. Potassium isobutyrate

D. Methanol

239. _____________ base crude oil is also called asphaltic crude?
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A. Naphthenic

B. Paraffinic

C. Mixed

D. Aromatic

240. Carbon/hydrogen ratio (by weight) is maximum (out of following) for_________________?
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A. Kerosene

B. Gasoline

C. Light gas oil

D. Heavy fuel oil