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.Management Sciences
Category: Petroleum Refinery Engineering
Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to__________________?
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A. Increase the yield of light distillates
B. Suppress coke formation
C. Enhance the octane number of gasoline
D. Reduce gum content in gasoline
The characterisation factor of a crude oil is calculated as 12.5. It means that; it is________________?
A. Paraffinic
B. Naphthenic
C. Intermediate
D. None of these
Extractor temperature is maintained at -20°C in Edeleanu process to reduce the _________________ of kerosene?
A. Smoke point
B. Paraffins
C. Aromatics
D. Naphthenes
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
Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its_________________?
A. Molecular weight
B. Aromatics content
C. Both A. & B.
D. Neither ‘a’ nor ‘b’
Which of the following has the maximum °API gravity of all ?
A. Diesel
B. Kerosene
C. Petrol
D. Furnace oil
Older crude petroleum __________________?
A. Is light and better
B. Gives more distillates
C. Gives less tar
D. All A., B. and C.
Lane and Garton classification of petroleum is based on its ____________________?
A. Composition
B. Specific gravity
C. Optical properties
D. Viscosity
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