Chemical Engineering MCQs

Page No. 528

Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is ________________?


aMore than 100


bRound about 100


cBetween 50 and 100


dLess than 25


View Answer More than 100

Asphalts are _________________?


aLow molecular weight & low boiling point compounds present in petroleum


bDesirable in catalytic cracking feedstock, because they produce coke


cReadily oxidisable and form carbonaceous sludge


dAll A., B. & C.



“Breathing loss” on storage of gasoline occurs due to the _____________________?


aPresence of unsaturated air


bFluctuation of ambient temperature during day and night


cBoth A. and B.


dNeither A. nor B.



Thermofor catalytic cracking process is a ______________ process?


aFixed bed


bMoving bed


cFluidised bed


dNon-catalytic


View Answer Non-catalytic

________________ treatment is done for appreciable improvement in viscosity index of lubricating oil?


aAcid


bSolvent extraction


cAlkali


dClay


View Answer Solvent extraction

Water separometer index (modified) (WSIM) of a petrofuel is the measure of its____________________?


aEmulsification tendency


bWater separation characteristics


cWater content


dWater absorbing capacity from atmosphere



Sweetening of petroleum product means the removal of ______________________?


aSulphur & its compounds


bWater


cOrganic impurities


dWax



Aniline point of high speed diesel may be about ____________ °C ?


a35


b70


c105


d150


View Answer 70

Which of the following theories of origin of petroleum does not explain the presence of nitrogen & sulphur compounds in crude oil ?


aModern theory


bCarbide theory


cEngler theory


dAll A., B. and C.


View Answer Carbide theory

Octane number (unleaded) of reformed gasoline may be upto ________________?


a60


b70


c80


d90


View Answer 90

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