Petroleum Refinery Engineering

281. Which of the following has the lowest cetane number?

1. Aromatics
2. i-paraffins
3. Naphthene
4. Olefins

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282. Which of the following has the lowest flash point of all?

1. Diesel
2. Kerosene
3. Petrol
4. Furnace oil

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283. Which of the following has the lowest viscosity (at a given temperature) of all?

1. Naphtha
2. Kerosene
3. Diesel
4. Lube oil

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284. Which of the following has the maximum °API gravity of all?

1. Diesel
2. Kerosene
3. Petrol
4. Furnace oil

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285. Which of the following has the minimum °API gravity of all?

1. Diesel
2. Kerosene
3. Petrol
4. Furnace oil

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286. Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency?

1. Paraffins
2. Naphthenes
3. Aromatics
4. Iso-paraffins

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287. Which of the following is a Naphthene?

1. Butene
2. Butadiene
3. Cyclohexane
4. Acetylene

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288. Which of the following is a non-regenerative fixed bed catalytic reforming process?

1. Hydroforming
2. Thermofor catalytic reforming
3. Platforming
4. Hyperforming

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289. Which of the following is an additive used for improving the cetane number of diesel?

1. Tetraethyl lead
2. Tetramethyllead
3. Ethyl nitrate or acetone
4. None of these

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290. Which of the following is desirable in diesel and kerosene but is undesirable in gasoline?

1. Aromatics
2. Mercaptans
3. Paraffins
4. Naphthenic acid

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