| 1. | 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 |
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Answer: (a).736
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| 2. | Mercaptans are |
| a. | low boiling sulphur compounds. |
| b. | added in LPG cylinders to detect gas leakage by its smell. |
| c. | undesirable in petrol, as they reduce its octane number. |
| d. | all (a), (b) and (c) |
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Answer: (d).all (a), (b) and (c)
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| 3. | Paraffin base crude oil as compared to asphalt base crude gives |
| a. | higher yield of straight run gasoline. |
| b. | higher octane number gasoline. |
| c. | lower viscosity index lube oil. |
| d. | poorer yield of lube oil. |
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Answer: (a).higher yield of straight run gasoline.
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| 4. | True boiling point apparatus is used for the |
| a. | determination of characterisation factor. |
| b. | evaluation of oil stocks. |
| c. | determination of true vapour pressure. |
| d. | none of these. |
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Answer: (b).evaluation of oil stocks.
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| 5. | In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones. |
| a. | sulphur increases |
| b. | sulphur decreases |
| c. | nitrogen decreases |
| d. | none of these |
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Answer: (a).sulphur increases
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