Q. Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater.

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Q. Viscosity index of a lubricating oil

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Q. Visbreaking process is used mainly for making

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Q. Operating condition in the electrical dehydrators for crude oil is about

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Q. Crude oil is pumped by a __________ pump.

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Q. Petrolatum is

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Q. Electrical desalting of crude oil removes the __________ impurities.

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Q. An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating.

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Q. Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the

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Q. Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms.

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Q. Antioxidants are added in petrol to

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Q. Gasoline extracted from natural gas (by compression and cooling) is called the __________ gasoline.

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Q. Which of the following categories of gasoline has the highest lead susceptibility ?

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Q. Gum formation in stored gasoline is mainly due to the

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Q. Flash point of an oil is determined by the

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Q. Phenols are added in gasoline to

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Q. The pressure (kg/cm² ) and temperature (°C) maintained in electrical desalters for crude oil are respectively

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Q. The average boiling point of aviation turbine fuel is closest to that of

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Q. Crude oil is transported inland from oil field to refineries, mainly by the

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Q. Solvent used for dewaxing of petroleum products are

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