Chemical Engineering MCQs

Page No. 525

Which of the following is the most widely used cracking process in oil refineries ?


aDubbs process


bT.C.C. moving bed process


cFluidised bed catalytic cracking process


dHoudry’s fixed bed process



Presence of aromatics in __________________?


aDiesel increases its cetane number


bKerosene increases its smoke point


cPetrol increases its octane number


dAll A., B. and C.



The main aim of cracking is to produce ____________________?


aGasoline


bLube oil


cPetrolatum


dCoke


View Answer Gasoline

Dearomatization of kerosene (by liquid sulphur dioxide extraction) is done to________________?


aIncrease its smoke point


bImprove its oxidation stability


cDecrease the breathing loss


dNone of these



Visbreaking__________________?


aUses natural gas as feed


bIs carried out at atmospheric pressure


cProduces fuel oil of lower viscosity


dProduces gasoline only



Flash point of an oil is determined by the _____________________?


aPensky Martens apparatus


bRamsbottom apparatus


cSaybolt viscometer


dConradson apparatus



Catalyst used in catalytic polymerisation which produces polymer gasoline is_________________?


aH2SO4


bH3PO4


cBoth A. and B.


dAlCl3


View Answer Both A. and B.

Hydrogen percentage (by weight) in crude petroleum may be about __________________?


a5


b15


c25


d35


View Answer 15

An upper limit of oil content is limited to about ______________ percent for achieving efficient and satisfactory level of wax sweating?


a5


b15


c40


d60


View Answer 40

Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C ?


aNaphtha


bPetrol


cKerosene


dHeavy fuel oil


View Answer Heavy fuel oil

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