chemical engineering petroleum refinery engineering Mcqs
1. Naphtha yield in straight run distillation of crude oil may be about _______________ percent?
comments icon0

A. 12

B. 2

C. 6

D. 18

2. Naphthenic acid is a/an ______________ compound?
comments icon0
A. Oxygen

B. Sulphur

C. Nitrogen

D. None of these

3. The colour of gasoline is an indication of its _________________?
comments icon0
A. Gum forming tendency & thoroughness of refining

B. Lead susceptibility

C. None of these

D. Octane number

4. Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with __________________?
comments icon0

A. Ethyl alcohol

B. Methyl alcohol

C. Methane

D. Ethane

5. Cetane number of high speed diesel must be ?_________________?
comments icon0

A. 95

B. 30

C. 75

D. 45
6. Products drawn from the top to bottom of the crude oil distillation column has progressively increasing ___________________?
comments icon0

A. Molecular weight

B. All A., B. and C.

C. C/H ratio

D. Boiling points

7. Increase in the specific gravity of petroleum products indicates________________?
comments icon0
A. Decrease in paraffin content

B. Increase in aromatic content

C. Increase in thermal energy per unit weight

D. Higher H/C ratio

8. In catalytic cracking, the___________________?
comments icon0

A. Gasoline obtained has a very low octane number

B. Gasoline obtained has very high aromatic content

C. Pressure & temperature is very high

D. Gasoline obtained has very high amount of gum forming compounds

9. High aniline point of a petrofuel (say diesel) indicates that ________________?
comments icon0
A. It is highly paraffinic in nature

B. Its ignition quality is very poor

C. It is highly aromatic in nature

D. It has a very low diesel index

10. The most widely used crude topping column in refineries is the ______________ column?
comments icon0

A. Fluidised bed

B. Perforated plate

C. Packed bed

D. Bubble-cap
11. The most important property for a jet fuel is its________________?
comments icon0

A. Calorific value

B. Freezing point

C. Viscosity

D. Flash point

12. Sour crude means the ________________ bearing crude?
comments icon0

A. Wax

B. Nitrogen compounds

C. Asphalt

D. Sulphur compounds
13. 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?
comments icon0

A. None of these

B. Aromatics

C. Olefins

D. n-paraffins

14. Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl isobutyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the____________________?
comments icon0

A. Elimination of solvent drying facility

B. All A., B. & C.

C. Lower solvent dilution ratio

D. Higher nitration temperature

15. Which of the following is not an important property of fuel oil/furnace oil ?
comments icon0

A. Flash point

B. Viscosity

C. Aniline point

D. Sulphur content

16. Solvent used in Edeleanu process is__________________?
comments icon0

A. Phenol

B. Liquid SO2

C. Propane

D. Furfural

17. Most commonly used crude heater before the fractionation tower in a refinery is the ______________ heater?
comments icon0

A. None of these

B. Pipestill

C. Steam coil

D. Electric immersion

18. Diesel used in naval applications has a minimum cetane number of ___________________?
comments icon0

A. 65

B. 45

C. 35

D. 25

19. The average boiling point of aviation turbine fuel is closest to that of__________________?
comments icon0
A. Kerosene

B. Diesel

C. Lubricating oils

D. LPG

20. Reforming__________________?
comments icon0

A. Uses naphtha as feedstock

B. Does not much affect the molecular weight of the feed

C. Improves the quality & yield of gasoline

D. All A., B. and C.
21. Aromatics have the highest ________________ of all the hydrocarbons of same carbon atoms?
comments icon0

A. Viscosity

B. Octane number

C. Smoke point

D. Cetane number

22. A good lubricant should have high _____________________ ?
comments icon0

A. Volatility

B. Viscosity index

C. Pour point

D. None of these

23. LPG stands for ____________________?
comments icon0

A. Liquefied petrol gas

B. Liquefied petroleum gas

C. Liquid petrol gas

D. Liquid petroleum gas

24. An upper limit of oil content is limited to about ______________ percent for achieving efficient and satisfactory level of wax sweating?
comments icon0

A. 15

B. 60

C. 40

D. 5

25. Octane number (unleaded) of reformed gasoline may be upto ________________?
comments icon0

A. 80

B. 60

C. 70

D. 90
26. The coking process normally mostly used in Indian oil refineries is the ____________________ coking process ?
comments icon0

A. Contact

B. Fluid

C. Flexi

D. Delayed
27. Which of the following is the most widely used cracking process in oil refineries ?
comments icon0

A. T.C.C. moving bed process

B. Houdrys fixed bed process

C. Dubbs process

D. Fluidised bed catalytic cracking process
28. Crude oil is transported inland from oil field to refineries, mainly by the _____________________?
comments icon0

A. Road tankers

B. Rail tankers

C. None of these

D. Underground pipelines
29. Cetane number of a diesel fuel is the measure of its____________________?
comments icon0

A. Viscosity

B. Ignition delay

C. Oxidation stability

D. Smoke point

30. Feedstock for polymerisation is__________________?
comments icon0

A. None of these

B. Naphtha

C. Low boiling aromatics

D. Cracked gases rich in C2 & C4 olefins
31. The characterisation factor of crude petroleum oil is around__________________?
comments icon0

A. 22

B. 3

C. 11

D. 28

32. Higher pressure in the reforming reactor________________?
comments icon0

A. Increases coke formation

B. Increases the rate of reaction

C. Produces high octane number gasoline

D. None of these
33. A typical yield of kerosene in straight run distillation of crude oil may be about __________________ percent?
comments icon0
A. 10

B. 18

C. 26

D. 4

34. The general formula of naphthenes is___________________?
comments icon0

A. CnH2n + 2

B. CnHn-4

C. Same as that for olefins i.e. CnH2n

D. CnH2n-6 (where, n ? 6)
35. Catalyst used in alkylation process is__________________?
comments icon0

A. Alumina

B. Silica gel

C. Sulphuric acid

D. Nickel

36. Catalyst used in catalytic polymerisation which produces polymer gasoline is_________________?
comments icon0

A. H2SO4

B. H3PO4

C. Both A. and B.

D. AlCl3

37. Octane number (unleaded) of gasoline produced by isomerisation of butane may be about __________________?
comments icon0

A. 90

B. 55

C. 70

D. 45

38. 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_________________?
comments icon0

A. Molecular weight

B. Aromatics content

C. Both A. & B.

D. Neither a nor b

39. Higher vapour pressure of gasoline indicates _________________?
comments icon0

A. Low flash point

B. High breathing loss

C. Both A. and B.

D. Neither A. nor B.
40. Hydrocracking employs ___________________?
comments icon0
A. High pressure & temperature

B. Low pressure & temperature

C. High pressure and low temperature

D. High temperature and low pressure

41. Presence of aromatics in __________________?
comments icon0

A. Diesel increases its cetane number

B. Kerosene increases its smoke point

C. All A., B. and C.

D. Petrol increases its octane number
42. In Hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen_________________?
comments icon0

A. Enhances the desulphurisation process

B. Minimises coke formation

C. Both A. and B.

D. Neither A. nor B.

43. During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) ________________ with increase in the amount of water?
comments icon0

A. Decreases linearly

B. Increases

C. Remains unchanged

D. Decreases

44. _____________ chloride present in crude petroleum as impurity is the most prolific producer of HCl during distillation?
comments icon0
A. Magnesium

B. Potassium

C. Calcium

D. Sodium

45. Octane number of gasoline is a measure of its__________________?
comments icon0

A. Smoke point

B. Ignition delay

C. Ignition temperature

D. Resistance to knock
46. Petrolatum is__________________?
comments icon0

A. Same as petroleum ether

B. Petroleum coke

C. None of these

D. A mixture of microcrystalline wax in viscous hydrocarbon liquids
47. Which of the following fractions of petroleum contains maximum sulphur ?
comments icon0
A. Atmospheric residue

B. Gasoline

C. Naphtha

D. Diesel

48. 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__________________?
comments icon0
A. Suppress coke formation

B. Reduce gum content in gasoline

C. Enhance the octane number of gasoline

D. Increase the yield of light distillates

49. Which of the following is a Naphthene ?
comments icon0

A. Butene

B. Cyclohexane

C. Acetylene

D. Butadiene

50. The octane number of aviation gasoline may be __________________?
comments icon0

A. 97

B. > 100

C. 87

D. 79