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chemical engineering petroleum refinery engineering MCQs

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 Review each marked answer and report any item that may be outdated or unclear.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
1. Naphtha yield in straight run distillation of crude oil may be about _______________ percent?
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A. 12

B. 2

C. 6

D. 18

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

B. Sulphur

C. Nitrogen

D. None of these

3. The colour of gasoline is an indication of its _________________?
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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 __________________?
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A. Ethyl alcohol

B. Methyl alcohol

C. Methane

D. Ethane

5. Cetane number of high speed diesel must be ?_________________?
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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 ___________________?
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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________________?
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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___________________?
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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 ________________?
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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?
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A. Fluidised bed

B. Perforated plate

C. Packed bed

D. Bubble-cap
11. The most important property for a jet fuel is its________________?
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A. Calorific value

B. Freezing point

C. Viscosity

D. Flash point

12. Sour crude means the ________________ bearing crude?
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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?
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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____________________?
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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 ?
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A. Flash point

B. Viscosity

C. Aniline point

D. Sulphur content

16. Solvent used in Edeleanu process is__________________?
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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?
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A. None of these

B. Pipestill

C. Steam coil

D. Electric immersion

18. Diesel used in naval applications has a minimum cetane number of ___________________?
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A. 65

B. 45

C. 35

D. 25

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

B. Diesel

C. Lubricating oils

D. LPG

20. Reforming__________________?
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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.