Category: Petroleum Refinery Engineering

A. Olefins
B. Naphthenes
C. Both A. and B.
D. Neither A. nor B.

A. From oil wells
B. In oil refineries
C. By natural gas stripping
D. None of these

A. Boiling points
B. Molecular weight
C. C/H ratio
D. All A., B. and C.

A. Coking
B. Visbreaking
C. Pyrolysis
D. None of these

A. Sweetening
B. Dehydration
C. Stabilisation
D. Visbreaking

A. Nature of boiling point diagram of the system
B. Amount of low boiling fraction present
C. Explosion hazards
D. All A., B. and C.

A. Can be separated out by distillation
B. Are not soluble in them
C. Crystallise out at low temperature
D. Decrease their viscosity

A. Catalytic naphtha – coking naphtha – virgin naphtha
B. Coking naphtha – virgin naphtha – catalytic naphtha
C. Virgin naphtha – catalytic naphtha – coking naphtha
D. Virgin naphtha – coking naphtha – catalytic naphtha

A. Naphthene
B. Olefin
C. Paraffin
D. Aromatics

A. Improve the octane number
B. Act as an antioxidant
C. Reduce its viscosity
D. Increase its pour point