MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The average boiling point of aviation turbine fuel is closest to that of |
| A. | lubricating oils |
| B. | LPG |
| C. | diesel |
| D. | Kerosene |
| Answer» E. | |
| 2. |
Solvent used for dewaxing of petroleum products are |
| A. | furfural |
| B. | methyl ethyl ketone (MEK) |
| C. | propane |
| D. | both(b)&(c) |
| Answer» E. | |
| 3. |
Testing of the knocking characteristics of petrofuels is done in a __________ engine. |
| A. | Carnot |
| B. | CFR (Co-operative fuel research) |
| C. | Stirling |
| D. | diesel |
| Answer» C. Stirling | |
| 4. |
Name the hydrocarbon having the poorest oxidation stability. |
| A. | naphthene |
| B. | olefin |
| C. | paraffin |
| D. | aromatics |
| Answer» E. | |
| 5. |
The first crude oil refinery of India is located at |
| A. | Naharkatiya |
| B. | Digboi |
| C. | Kochin |
| D. | Madras |
| Answer» C. Kochin | |
| 6. |
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. | |
| 7. |
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» D. Naphthenic acid | |
| 8. |
The proper arrangement of the petroleum fractions in order of their boiling points is |
| A. | lubricating oil > diesel > petrol > LPG |
| B. | lubricating oil > petrol > diesel > LPG |
| C. | petrol > lubricating oil > diesel > LPG |
| D. | petrol > diesel > LPG > lubricating oil |
| Answer» B. lubricating oil > petrol > diesel > LPG | |
| 9. |
Octane number of gasoline produced by two stage fluidised catalytic cracking process is |
| A. | 80 |
| B. | 87 |
| C. | 92 |
| D. | 97 |
| Answer» E. | |
| 10. |
A petroleum well is called 'dry', if it contains |
| A. | very little oil. |
| B. | no natural gas. |
| C. | only natural gas. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 11. |
Aniline point is the |
| A. | characteristic property of diesel & lubricating oils. |
| B. | measure of aromatic content of oil. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 12. |
Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about __________ kg/cm2 . |
| A. | 1.5 |
| B. | 3 |
| C. | 6 |
| D. | 12 |
| Answer» C. 6 | |
| 13. |
Petroleum |
| A. | is optically active. |
| B. | constitutes mainly of olefins. |
| C. | does not contain asphalt. |
| D. | does not contain aromatics. |
| Answer» B. constitutes mainly of olefins. | |
| 14. |
With increase in density, the viscosity of petroleum products |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | either (a) or (b) |
| Answer» B. decreases | |
| 15. |
Detergent is added as an additive in engine lubricating oil to |
| A. | reduce deposit formation. |
| B. | keep contaminants in suspension. |
| C. | increase oxidation stability. |
| D. | prevent rusting. |
| Answer» B. keep contaminants in suspension. | |
| 16. |
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. | |
| 17. |
In hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen |
| A. | enhances the desulphurisation process. |
| B. | minimises coke formation. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 18. |
The most commonly used feed stock for the reforming reactor is |
| A. | heavy fuel oil |
| B. | residuum |
| C. | straight run gasoline |
| D. | casing head gasoline |
| Answer» D. casing head gasoline | |
| 19. |
Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency ? |
| A. | Paraffins |
| B. | Naphthenes |
| C. | Aromatics |
| D. | Iso-paraffins |
| Answer» B. Naphthenes | |
| 20. |
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) | |
| 21. |
Which of the following has the lowest flash point of all? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» D. Furnace oil | |
| 22. |
Cetane number of high speed diesel must be |
| A. | 30 |
| B. | 45 |
| C. | 75 |
| D. | 95 |
| Answer» C. 75 | |
| 23. |
Choose the correct statement. |
| A. | Octane number of i-octane is zero. |
| B. | Octane number of paraffins increases with increasing number of carbon atoms. |
| C. | Branched chain paraffins have higher octane number than straight chain paraffins with same number of carbon atoms. |
| D. | The aromatics have lower octane number than naphthenes with same number of carbon atoms. |
| Answer» D. The aromatics have lower octane number than naphthenes with same number of carbon atoms. | |
| 24. |
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. | |
| 25. |
Maximum use of petroleum coke is in |
| A. | adsorption refining operation. |
| B. | fuel gas manufacture. |
| C. | carbon electrode manufacture. |
| D. | iron ore reduction. |
| Answer» D. iron ore reduction. | |
| 26. |
Carbon/hydrogen ratio (by weight) is maximum (out of following) for |
| A. | gasoline |
| B. | kerosene |
| C. | light gas oil |
| D. | heavy fuel oil |
| Answer» B. kerosene | |
| 27. |
The catalytic cracking of heavier petroleum fraction is done to produce mainly |
| A. | gasoline |
| B. | asphalt |
| C. | diesel oil |
| D. | tar |
| Answer» D. tar | |
| 28. |
Doctor's solution used for sweetening of petroleum products is |
| A. | sodium plumbite |
| B. | sodium sulphite |
| C. | sodium thiosulphate |
| D. | lead sulphate |
| Answer» B. sodium sulphite | |
| 29. |
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. | |
| 30. |
The characterisation factor of a crude oil is calculated as 12.5. It means that; it is |
| A. | paraffinic |
| B. | naphthenic |
| C. | intermediate |
| D. | none of these |
| Answer» B. naphthenic | |
| 31. |
Octane number of n-heptane is assumed to be |
| A. | 100 |
| B. | 0 |
| C. | 70 |
| D. | |
| Answer» C. 70 | |
| 32. |
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 | |
| 33. |
Which of the following petroleum products contain minimum sulphur ? |
| A. | Naphtha |
| B. | Kerosene |
| C. | LSHS |
| D. | Furnace oil |
| Answer» B. Kerosene | |
| 34. |
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). | |
| 35. |
High aniline point of a petrofuel (say diesel) indicates that |
| A. | it is highly aromatic in nature. |
| B. | it is highly paraffinic in nature. |
| C. | it has a very low diesel index. |
| D. | its ignition quality is very poor. |
| Answer» C. it has a very low diesel index. | |
| 36. |
Waxy crudes are treated with chemical additives mainly to |
| A. | depress its pour point |
| B. | dissolve wax |
| C. | precipitate wax |
| D. | remove wax |
| Answer» B. dissolve wax | |
| 37. |
__________ 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 | |
| 38. |
Molecular weight of petrol may be about |
| A. | 40-60 |
| B. | 100-130 |
| C. | 250-300 |
| D. | 350-400 |
| Answer» C. 250-300 | |
| 39. |
Which of the following factors does not govern the mechanism of petroleum formation from organic sources ? |
| A. | pH of the soil |
| B. | Bacterial action |
| C. | Heat |
| D. | Pressure |
| Answer» B. Bacterial action | |
| 40. |
Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute). |
| A. | 5-10 |
| B. | 30-80 |
| C. | 150-250 |
| D. | 350-400 |
| Answer» C. 150-250 | |
| 41. |
The yield of straight run LPG from crude oil is about __________ weight percent. |
| A. | 20-25 |
| B. | 1-1.5 |
| C. | 10-15 |
| D. | 0.1-0.2 |
| Answer» C. 10-15 | |
| 42. |
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. | |
| 43. |
Which of the following is used as a solvent in deasphalting of petroleum products ? |
| A. | Furfural |
| B. | Propane |
| C. | Methyl ethyl ketone |
| D. | Liquid sulphur dioxide |
| Answer» C. Methyl ethyl ketone | |
| 44. |
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) | |
| 45. |
The reservoir rock containing petroleum has |
| A. | low porosity |
| B. | high permeability |
| C. | high porosity |
| D. | both (b) and (c) |
| Answer» E. | |
| 46. |
Fuel oil is subjected to visbreaking to reduce its |
| A. | pour point |
| B. | viscosity |
| C. | pressure drop on pumping |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 47. |
The doctor's solution comprises of sodium plumbite in |
| A. | alcohal |
| B. | water |
| C. | aqueous caustic soda |
| D. | soda ash |
| Answer» D. soda ash | |
| 48. |
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 | |
| 49. |
Removal of light fractions from crude oil is called its |
| A. | sweetening |
| B. | dehydration |
| C. | stabilisation |
| D. | visbreaking |
| Answer» D. visbreaking | |
| 50. |
LSHS is a type of furnace oil, which |
| A. | is more viscous than high viscosity furnace oil (HVFO). |
| B. | stands for low sulphur heavy stock. |
| C. | is an ideal fuel for metallurgical furnaces due to its lower sulphur content (< 1%). |
| D. | all (a), (b) and (c). |
| Answer» E. | |