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.
| 1. |
Octane number of -heptane is assumed to be |
| A. | 100 |
| B. | 0 |
| C. | 70 |
| D. | ∞ |
| Answer» C. 70 | |
| 2. |
Concentration of HSO catalyst in alkyla-tion is kept between 90-98%, because HSO 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). | |
| 3. |
The pressure (kg/cm ) and temperature (°C) maintained in electrical desalters for crude oil are respectively |
| A. | 10 and 120 |
| B. | 1 and 200 |
| C. | 50 and 250 |
| D. | 10 and 300 |
| Answer» B. 1 and 200 | |
| 4. |
Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm 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. | |
| 5. |
Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO extraction (Edeleanu process), its smoke point may become __________ mm. |
| A. | 5 |
| B. | 10 |
| C. | 25 |
| D. | 100 |
| Answer» D. 100 | |
| 6. |
Which of the following has the maximum °API gravity of all? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» D. Furnace oil | |
| 7. |
Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about __________ kg/cm . |
| A. | 1.5 |
| B. | 3 |
| C. | 6 |
| D. | 12 |
| Answer» C. 6 | |
| 8. |
Which of the following has the minimum °API gravity of all? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» E. | |
| 9. |
Aniline point of high speed diesel may be about __________ °C. |
| A. | 35 |
| B. | 70 |
| C. | 105 |
| D. | 150 |
| Answer» C. 105 | |
| 10. |
A fuel oil consists of 4 fractions A, B, C and D. Their molar compositions and vapour pressures are given below :The vapour pressure of the fuel oil will be __________ mm Hg. |
| A. | 736 |
| B. | 727.5 |
| C. | 512 |
| D. | 767.8 |
| Answer» B. 727.5 | |
| 11. |
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» D. naphthenes | |
| 12. |
Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C ? |
| A. | Naphtha |
| B. | Petrol |
| C. | Kerosene |
| D. | Heavy fuel oil |
| Answer» E. | |
| 13. |
Flash point of diesel/kerosene (>50°C) is determined by the |
| A. | Abel apparatus |
| B. | Pensky-Martens apparatus |
| C. | Saybolt chromometer |
| D. | none of these |
| Answer» C. Saybolt chromometer | |
| 14. |
CH 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) | |
| 15. |
Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners? |
| A. | CM |
| B. | ar |
| C. | ight diesel oil |
| D. | ow viscosity furnace oil |
| Answer» D. ow viscosity furnace oil | |
| 16. |
Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke? |
| A. | aphtha |
| B. | acuum residue |
| C. | ight gas oil |
| D. | iesel |
| Answer» C. ight gas oil | |
| 17. |
Which of the following factors does not govern the mechanism of petroleum formation from organic sources? |
| A. | H of the soil |
| B. | acterial action |
| C. | eat |
| D. | ressure |
| Answer» B. acterial action | |
| 18. |
Diesel index (an alternative index for expressing the quality of diesel) is |
| A. | determined by using a test engine. |
| B. | not related to aniline point. |
| C. | equal to cetane number plus 3. |
| D. | all (a), (b) & (c). |
| Answer» D. all (a), (b) & (c). | |
| 19. |
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) | |
| 20. |
Cetane number of high speed diesel must be ≥ |
| A. | 30 |
| B. | 45 |
| C. | 75 |
| D. | 95 |
| Answer» C. 75 | |
| 21. |
A fuel oil consists of 4 fractions A, B, C and D. Their molar compositions and vapour pressures are given below. The vapour pressure of the fuel oil will be __________ mm Hg. |
| A. | 736 |
| B. | 727.5 |
| C. | 512 |
| D. | 767.8 |
| Answer» B. 727.5 | |
| 22. |
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. | |
| 23. |
Which of the following is an additive used for improving the cetane number of diesel? |
| A. | Tetraethyl lead |
| B. | Tetramethyllead |
| C. | Ethyl nitrate or acetone |
| D. | None of these |
| Answer» B. Tetramethyllead | |
| 24. |
Which of the following additives improves the cetane number of diesel? |
| A. | Amyl nitrate |
| B. | Ethyl mercaptan |
| C. | Napthenic acid |
| D. | Tetra ethyl lead |
| Answer» C. Napthenic acid | |
| 25. |
Sour crude means the __________ bearing crude. |
| A. | Asphalt |
| B. | Sulphur compounds |
| C. | Wax |
| D. | Nitrogen compounds |
| Answer» C. Wax | |
| 26. |
Which of the following processes in oil refinery does not employ 'cracking'? |
| A. | Coking |
| B. | Visbreaking |
| C. | Pyrolysis |
| D. | None of these |
| Answer» E. | |
| 27. |
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 & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 28. |
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 | |
| 29. |
Which of the following petroleum products contain minimum sulphur? |
| A. | Naphtha |
| B. | Kerosene |
| C. | LSHS |
| D. | Furnace oil |
| Answer» B. Kerosene | |
| 30. |
CnH2n is the general formula for |
| A. | Olefins |
| B. | Naphthenes |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 31. |
Which of the following is a naphthene? |
| A. | Butene |
| B. | Butadiene |
| C. | Cyclohexane |
| D. | Acetylene |
| Answer» D. Acetylene | |
| 32. |
Which of the following is the most suitable feed for platforming process (reforming)? |
| A. | Olefinic hydrocarbon |
| B. | Naphtha |
| C. | Fuel oil |
| D. | Atmospheric residue |
| Answer» B. Naphtha | |
| 33. |
Which of the following is the most important property for a jet fuel? |
| A. | Cloud point |
| B. | Pour point |
| C. | Colour |
| D. | Freezing point |
| Answer» E. | |
| 34. |
Which of the following processes consumes hydrogen? |
| A. | Fluid catalytic cracking |
| B. | Visbreaking |
| C. | Propane deasphalting |
| D. | None of these |
| Answer» B. Visbreaking | |
| 35. |
Absolute vapor pressure of petrofuels is found by Reid bomb which is heated in water bath to 100°F. In Reid apparatus, the ratio of the volume of air chamber to that of the liquid fuel chamber is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 36. |
Breathing loss on storage of gasoline occurs due to the |
| A. | Presence of unsaturated air |
| B. | Fluctuation of ambient temperature during day and night |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» C. Both A & B | |
| 37. |
Which is the most desirable component of a good quality kerosene? |
| A. | I-paraffins |
| B. | Aromatics |
| C. | N-paraffins |
| D. | Naphthenes |
| Answer» D. Naphthenes | |
| 38. |
For gasoline, the flash point (<50°C) is determined by the |
| A. | Abel apparatus |
| B. | Pensky-Marten's apparatus |
| C. | Saybolt chromometer |
| D. | None of these |
| Answer» E. | |
| 39. |
Which one is preferred for aircraft engine? |
| A. | High viscosity index lube oil |
| B. | Low viscosity index lube oil |
| C. | High freezing point aviation fuel |
| D. | None of these |
| Answer» B. Low viscosity index lube oil | |
| 40. |
Mercaptans are added to liquefied petroleum gas (LPG) to |
| A. | Reduce its cost |
| B. | Narrow down its explosion limit |
| C. | Assist in checking its leakage from cylinder |
| D. | Increase its calorific value |
| Answer» D. Increase its calorific value | |
| 41. |
Which of the following processes is used for the production of petroleum coke? |
| A. | Stabilisation |
| B. | Visbreaking |
| C. | Cracking |
| D. | Reforming |
| Answer» D. Reforming | |
| 42. |
Which of the following is desirable in diesel and kerosene but is undersirable in gasoline? |
| A. | Aromatics |
| B. | Mercaptans |
| C. | Paraffins |
| D. | Naphthenic acid |
| Answer» B. Mercaptans | |
| 43. |
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 | |
| 44. |
Cetane number of high speed diesel must be? |
| A. | 30 |
| B. | 45 |
| C. | 75 |
| D. | 95 |
| Answer» C. 75 | |
| 45. |
Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C ? |
| A. | Naphtha |
| B. | Petrol |
| C. | Kerosene |
| D. | Heavy fuel oil |
| Answer» E. | |
| 46. |
Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO₂ extraction (Edeleanu process), its smoke point may become __________ mm. |
| A. | 5 |
| B. | 10 |
| C. | 25 |
| D. | 100 |
| Answer» D. 100 | |
| 47. |
Which of the following tests is not done for transformer oil? |
| A. | Flash point and acid value |
| B. | Aniline point |
| C. | Dielectric strength |
| D. | Copper strip corrosion test |
| Answer» C. Dielectric strength | |
| 48. |
Which of the following is the most widely used cracking process in oil refineries? |
| A. | Dubbs process |
| B. | T.C.C. moving bed process |
| C. | Fluidised bed catalytic cracking process |
| D. | Houdry's fixed bed process |
| Answer» D. Houdry's fixed bed process | |
| 49. |
Lane and Garton classification of petroleum is based on its |
| A. | Composition |
| B. | Specific gravity |
| C. | Optical properties |
| D. | Viscosity |
| Answer» C. Optical properties | |
| 50. |
Which of the following gasolines (unleaded) has the least octane number? |
| A. | Catalytically cracked gasoline |
| B. | Straight run gasoline |
| C. | Catalytically reformed gasoline |
| D. | Polymer gasoline |
| Answer» C. Catalytically reformed gasoline | |