A. Thermal cracking
B. Gum formation
C. Coking
D. Discoloration
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Related Mcqs:
- Road grade bitumen is produced from vacuum residue by its ____________________?
- A. Aeration B. Pyrolysis C. Hydrogenation D. Steam reforming...
- The proper arrangement of the petroleum fractions in order of their boiling points is __________________ ?
- A. Lubricating oil > diesel > petrol > LPG B. Lubricating oil > petrol > diesel > LPG C. Petrol > lubricating oil > diesel > LPG D. Petrol > diesel > LPG > lubricating oil...
- Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil__________________?
- A. Gives higher yield of petrol B. Lower octane number of petrol C. Higher sulphur content in the product D. Higher gum forming material in petrol...
- The most suitable solvent for deasphalting vacuum residue is_____________________?
- A. Propane B. Methyl ethyl ketone C. Doctor’s solution D. Methanol amine...
- Flash point of atmospheric distillation residue is determined by ______________ apparatus?
- A. Pensky-Martens (closed cup type) B. Abel C. Cleveland (open cup type) D. None of these...
- The vacuum maintained in vacuum distillation unit for reduced crude is about _______________ mm Hg?
- A. 1.2 B. 12 C. 120 D. 700...
- Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about _______________ mm Hg (absolute)?
- A. 5-10 B. 30-80 C. 150-250 D. 350-400...
- Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about ________________ mm Hg absolute?
- A. 1 to 5 B. 30 to 80 C. 250 to 350 D. 450 to 500...
- Removal of light fractions from crude oil is called its _____________________?
- A. Sweetening B. Dehydration C. Stabilisation D. Visbreaking...
- Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API) ?
- A. Diesel B. Gasoline C. Atmospheric gas oil D. Vacuum gas oil...
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