MCQOPTIONS
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MCQOPTIONS
This section includes 401 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
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. |
| Answer» C. enhance the octane number of gasoline. | |
| 202. |
Which parameter is used for the grading of paraffin waxes ? |
| A. | Specific gravity |
| B. | Melting point |
| C. | Viscosity |
| D. | Penetration number |
| Answer» D. Penetration number | |
| 203. |
Thermofer catalytic cracking process is a __________ process. |
| A. | fixed bed |
| B. | moving bed |
| C. | fluidised bed |
| D. | non-catalytic |
| Answer» E. | |
| 204. |
The average boiling point of aviation turbine fuel is closest to that of |
| A. | lubricating oils |
| B. | LPG |
| C. | diesel |
| D. | Kerosene |
| Answer» E. | |
| 205. |
Smoke point of kerosene expresses its |
| A. | burning characteristics. |
| B. | luminosity characteristics. |
| C. | aromatic content directly. |
| D. | lamp wick wetting characteristics. |
| Answer» B. luminosity characteristics. | |
| 206. |
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' |
| Answer» C. R-S-R | |
| 207. |
Which is the most effective catalyst used in catalytic cracking of petroleum products ? |
| A. | Iron oxide |
| B. | Nickel |
| C. | Vanadium pentoxide |
| D. | Zeolite |
| Answer» E. | |
| 208. |
The characterisation factor of crude petroleum oil is around |
| A. | 3 |
| B. | 11 |
| C. | 22 |
| D. | 28 |
| Answer» C. 22 | |
| 209. |
Feedstock for the production of biodiesel is |
| A. | herbal plants |
| B. | used vegetable oils |
| C. | LSHS |
| D. | bagasse |
| Answer» C. LSHS | |
| 210. |
Which of the following categories of gasoline has the highest lead susceptibility ? |
| A. | Straight run gasoline |
| B. | Platinum reformed gasoline |
| C. | Catalytical cracked gasoline |
| D. | Polymer gasoline |
| Answer» B. Platinum reformed gasoline | |
| 211. |
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 |
| Answer» D. either more or less; depends on the room temperature | |
| 212. |
Cetane number of high speed diesel must be ‚â•$ |
| A. | 30 |
| B. | 45 |
| C. | 75 |
| D. | 95 |
| Answer» C. 75 | |
| 213. |
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. | |
| 214. |
Which of the following has maximum hydrogen/carbon ratio (by weight) ? |
| A. | Naphtha |
| B. | Gasoline |
| C. | Diesel |
| D. | Fuel oil |
| Answer» C. Diesel | |
| 215. |
Isomerisation converts the __________ tot-paraffins. |
| A. | paraffins |
| B. | olefins |
| C. | naphthenes |
| D. | none of these |
| Answer» B. olefins | |
| 216. |
Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners ? |
| A. | PCM |
| B. | Tar |
| C. | Light diesel oil |
| D. | Low viscosity furnace oil |
| Answer» D. Low viscosity furnace oil | |
| 217. |
The general formula of naphthenes is |
| A. | CnH2n + 2 |
| B. | CnH2n-6 (where, n ‚â• 6) |
| C. | CnHn-4 |
| D. | same as that for olefins i.e. CnH2n |
| Answer» E. | |
| 218. |
Penetration test determines the __________ of the grease. |
| A. | stiffness |
| B. | lubricating properties (e.g. oilness) |
| C. | service temperature |
| D. | variation in viscosity with temperature |
| Answer» B. lubricating properties (e.g. oilness) | |
| 219. |
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 (a), (b) and (c) |
| Answer» E. | |
| 220. |
Older crude petroleum |
| A. | is light and better. |
| B. | gives more distillates. |
| C. | gives less tar. |
| D. | all (a), (b) and (c). |
| Answer» C. gives less tar. | |
| 221. |
Hydrocracking employs |
| A. | high pressure & temperature. |
| B. | low pressure & temperature. |
| C. | high pressure and low temperature. |
| D. | high temperature and low pressure. |
| Answer» B. low pressure & temperature. | |
| 222. |
Petroleum is believed to have originated from __________ sources. |
| A. | vegetable |
| B. | animal |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 223. |
Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of |
| A. | propane & butane |
| B. | butane & ethane |
| C. | methane & ethane |
| D. | methane & carbon monoxide |
| Answer» B. butane & ethane | |
| 224. |
Flash point of an oil is determined by the |
| A. | Pensky Martens apparatus. |
| B. | Ramsbottom apparatus. |
| C. | Saybolt viscometer. |
| D. | Conradson apparatus. |
| Answer» B. Ramsbottom apparatus. | |
| 225. |
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. |
| A. | 1 |
| B. | 50 |
| C. | 5000 |
| D. | 10000 |
| Answer» C. 5000 | |
| 226. |
The condesate obtained on compression of wet natural gas is termed as |
| A. | liquefied natural gasoline |
| B. | natural gasoline |
| C. | liquid natural gas |
| D. | none of these |
| Answer» C. liquid natural gas | |
| 227. |
Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke ? |
| A. | Naphtha |
| B. | Vacuum residue |
| C. | Light gas oil |
| D. | Diesel |
| Answer» C. Light gas oil | |
| 228. |
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 | |
| 229. |
Olefins are |
| A. | saturated hydrocarbons. |
| B. | unsaturated cyclic compounds (hydrocarbons). |
| C. | present in substantially good quantity in crude petroleum. |
| D. | none of these. |
| Answer» E. | |
| 230. |
Smoke volatility index is equal to smoke point plus |
| A. | 0.42 x(% distilled at 204°C) |
| B. | 5 mm |
| C. | 0.84 x (% distilled at 204°C) |
| D. | 10 mm. approximately |
| Answer» B. 5 mm | |
| 231. |
Liquefied Petroleum Gas (LPG) is mainly a mixture of |
| A. | propane & butane |
| B. | methane & ethane |
| C. | high boiling olefins |
| D. | high boiling naphthenes |
| Answer» B. methane & ethane | |
| 232. |
Most widely used solvent for dewaxing is |
| A. | methyl-ethyl-ketone (MEK) |
| B. | naphtha |
| C. | petroleum ether |
| D. | sodium plumbite |
| Answer» B. naphtha | |
| 233. |
Which of the following theories of origin of petroleum does not explain the presence of nitrogen & sulphur compounds in crude oil? |
| A. | Modern theory |
| B. | Carbide theory |
| C. | Engler theory |
| D. | all (a), (b) and (c) |
| Answer» C. Engler theory | |
| 234. |
__________ chloride present in crude petroleum as impurity is the most prolific producer of HCl during distillation. |
| A. | Magnesium |
| B. | Potassium |
| C. | Calcium |
| D. | Sodium |
| Answer» B. Potassium | |
| 235. |
Solvent used in the Udex (glycol) extraction process for removal of light aromatics from cracked naphtha is |
| A. | propane. |
| B. | diethylene glycol. |
| C. | aqueous solution (10% water) of diethylene glycol. |
| D. | methyl ethyl ketone (MEK). |
| Answer» D. methyl ethyl ketone (MEK). | |
| 236. |
Quinoline is a/an __________ compound. |
| A. | sulphur |
| B. | nitrogen |
| C. | oxygen |
| D. | none of these |
| Answer» C. oxygen | |
| 237. |
The yield of straight run LPG from crude oil is about __________ weight percent. |
| A. | 20-25 |
| B. | 1-1.5 |
| C. | 42278 |
| D. | 0.1-0.2 |
| Answer» C. 42278 | |
| 238. |
Which one of the following processes aims at producing higher yield of gaseous unsaturated hydrocarbons and aromatics like benzene & toluene ? |
| A. | Reforming |
| B. | Pyrolysis |
| C. | Alkylation |
| D. | Hydrocracking |
| Answer» B. Pyrolysis | |
| 239. |
Catalyst used in the catalytic polymerisation is |
| A. | phosphoric acid on kieselghur |
| B. | aluminium chloride |
| C. | nickel |
| D. | vanadium pentaoxide |
| Answer» B. aluminium chloride | |
| 240. |
CnH2n is the general formula for |
| A. | olefins |
| B. | naphthenes |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 241. |
Petroleum coke is used mainly .in the |
| A. | discoloration of yellow glycerine. |
| B. | sugar refining. |
| C. | manufacture of carbon electrode. |
| D. | blast furnace for reduction of iron ore. |
| Answer» D. blast furnace for reduction of iron ore. | |
| 242. |
Which of the following has the lowest cetane number ? |
| A. | Aromatics |
| B. | i-paraffins |
| C. | Naphthene |
| D. | Olefins |
| Answer» B. i-paraffins | |
| 243. |
The terminology used for the bottom most product from the vacuum crude distillation unit is |
| A. | residual crude |
| B. | residuum |
| C. | reduced crude |
| D. | petrolatum |
| Answer» C. reduced crude | |
| 244. |
Sulphuric acid treatment of petroleum products removes the __________ materials. |
| A. | gum forming |
| B. | color forming |
| C. | asphaltic |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 245. |
Which of the following is a naphthene ? |
| A. | Butene |
| B. | Butadiene |
| C. | Cyclohexane |
| D. | Acetylene |
| Answer» D. Acetylene | |
| 246. |
Concentration of H2SO4 catalyst in alkyla-tion is kept between 90-98%, because H2SO4 having concentration |
| A. | less than 90% promotes polymerisation. |
| B. | more than 98% promotes cracking. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 247. |
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). |
| Answer» E. | |
| 248. |
Higher vapour pressure of gasoline indicates |
| A. | low flash point |
| B. | high breathing loss |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» E. | |
| 249. |
Extractor temperature is maintained at -20°C in Edeleanu process to reduce the __________ of kerosene.$ |
| A. | smoke point |
| B. | paraffins |
| C. | aromatics |
| D. | naphthenes |
| Answer» C. aromatics | |
| 250. |
Straight run petrol as compared to methyl/ethyl alcohol has |
| A. | lower calorific value. |
| B. | lower octane number. |
| C. | higher specific gravity. |
| D. | higher ignition temperature. |
| Answer» C. higher specific gravity. | |