Visbreaking
A. Uses natural gas as feed
B. Is carried out at atmospheric pressure
C. Produces fuel oil of lower viscosity
D. Produces gasoline only
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Smoke volatility index is equal to smoke point plus
A. 0.42 × (% distilled at 204°C)
B. 5 mm
C. 0.84 × (% distilled at 204°C)
D. 10 mm approximately
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Antioxidants are added in petrol to
A. Impart colour to it, for easy identification
B. Minimise the gum formation
C. Prevent icing of the carburettor
D. Prevent the lead build up in engines
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Solvent used for dewaxing of petroleum products are
A. Furfural
B. Methyl ethyl ketone (MEK)
C. Propane
D. Both B & C
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Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about __________ ppm.
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A typical yield of diesel in straight run distillation of crude oil may be about __________ percent.
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A typical yield of kerosene in straight run distillation of crude oil may be about __________ percent.
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Naphtha yield in straight run distillation of crude oil may be about __________ percent.
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Which of the following processes in oil refinery does not employ 'cracking'?
A. Coking
B. Visbreaking
C. Pyrolysis
D. None of these
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Most widely used solvent for dewaxing is
A. Methyl-ethyl-ketone (MEK)
B. Naphtha
C. Petroleum ether
D. Sodium plumbite
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Pick out the wrong statement.
A. Iso-paraffin crack faster than n-paraf-fin
B. Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic
C. Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking
D. None of these
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Percentage of straight run gasoline in a typical crude oil may be around
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