Chemical Engineering MCQs

Page No. 530

A good lubricant should have high _____________________ ?


aViscosity index


bVolatility


cPour point


dNone of these


View Answer Viscosity index

Name the hydrocarbon having the poorest oxidation stability ?


aNaphthene


bOlefin


cParaffin


dAromatics


View Answer Aromatics

Phenols are added in gasoline to____________________?


aImprove the octane number


bAct as an antioxidant


cReduce its viscosity


dIncrease its pour point


View Answer Act as an antioxidant

Paraffin base crude oil as compared to asphalt base crude gives___________________?


aHigher yield of straight run gasoline


bHigher octane number gasoline


cLower viscosity index lube oil


dPoorer yield of lube oil



Flash point of an oil gives an idea of the___________________?


aNature of boiling point diagram of the system


bAmount of low boiling fraction present


cExplosion hazards


dAll A., B. and C.



Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about ________________ ppm?


a1


b50


c5000


d10000


View Answer 50

The reservoir rock containing petroleum has_________________?


aLow porosity


bHigh permeability


cHigh porosity


dBoth B. and C.


View Answer Both B. and C.

Which is an anticing compound ?


aAmyl nitrate


bAlcohols


cMercaptans


dPyridine


View Answer Alcohols

Polymerisation__________________?


aProduces i-octane from cracked gases containing i-butane and butene


bCauses olefins to combine with each other


cCauses aromatics to combine with each other


dNone of theseIs aimed at producing lubricating oil



Which of the following constituents present in petroleum is responsible for ash formation ?


aNitrogen compounds


bOrganometallic compounds


cSulphur compounds


dOxygen compounds


View Answer Sulphur compounds

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