Chemical Engineering MCQs

Page No. 531

Aniline point is a property of the__________________?


aDiesel


bLPG


cNaphtha


dGasoline


View Answer Naphtha

Clay treatment of petroleum products __________________?


aDecolorizes & stabilises cracked gasoline


bDesulphurise straight run gasoline & kerosene


cAdsorb arsenic from feedstock to catalytic reforming


dAll A., B. & C.


View Answer All A., B. & C.

The main reaction in reforming is the _____________________?


aDehydrogenation of naphthenes


bHydrogenation of naphthenes


cHydrocracking of paraffins


dSaturation of olefins



Percentage of straight run gasoline in a typical crude oil may be around________________?


a6


b18


c38


d52


View Answer 52

Gasoline yield in catalytic reforming of naphtha may be about _________________ percent by weight?


a85


b65


c50


d98


View Answer 85

The terminology used for the bottom most product from the vacuum crude distillation unit is______________?


aResidual crude


bResiduum


cReduced crude


dPetrolatum


View Answer Residuum

Waxes present in petroleum products_________________?


aCan be separated out by distillation


bAre not soluble in them


cCrystallise out at low temperature


dDecrease their viscosity



Pyrolysis of kerosene or natural gasoline is done to produce mainly the___________________?


aOlefins and aromatics


bLighter paraffins


cStabilised gasoline


dDiesel


View Answer Olefins and aromatics

Which of the following is the most important property for a jet fuel ?


aCloud point


bPour point


cColour


dFreezing point


View Answer Freezing point

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__________________?


aIncrease the yield of light distillates


bSuppress coke formation


cEnhance the octane number of gasoline


dReduce gum content in gasoline



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