Petroleum Refinery Engineering

201. Smoke point of kerosene is the

1. Time after which smoking starts on burning
2. Temperature at which smoking starts
3. Maximum height of flame (in mm) without causing smoking, when burnt in a standard lamp
4. None of these

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202. Smoke volatility index is equal to smoke point plus

1. 0.42 × (% distilled at 204°C)
2. 5 mm
3. 0.84 × (% distilled at 204°C)
4. 10 mm approximately

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203. Solution used in Doctor's treatment for the removal of mercaptans is

1. Sodium hydroxide
2. Sodium plumbite
3. Cupric chloride
4. Potassium isobutyrate

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204. 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

1. Elimination of solvent drying facility
2. Higher nitration temperature
3. Lower solvent dilution ratio
4. All (A), (B) & (C)

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205. Solvent used for dewaxing of petroleum products are

1. Furfural
2. Methyl ethyl ketone (MEK)
3. Propane
4. Both (B) & (C)

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206. Solvent used in duo-sol extraction for lube oil upgradation is a mixture of

1. Propane & phenol-cresol mixture
2. Methyl ethyl ketone & glycol
3. Phenol & furfural
4. Propane & liquid sulphur dioxide

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207. Solvent used in Edeleanu process is

1. Furfural
2. Propane
3. Liquid SO2
4. Phenol

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208. Solvent used in the deasphalting process is

1. Furfural
2. Phenol
3. Propane
4. Hexane

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209. Solvent used in the Udex (glycol) extraction process for removal of light aromatics from cracked naphtha is

1. Propane
2. Diethylene glycol
3. Aqueous solution (10% water) of diethylene glycol
4. Methyl ethyl ketone (MEK)

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210. Sour crude means the _________ bearing crude.

1. Asphalt
2. Sulphur compounds
3. Wax
4. Nitrogen compounds

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