Chemical Engineering MCQs

Page No. 524

The amount of tetraethyl lead added to improve the octane number of motor gasoline is around ______________ c.c per gallon of petrol?


a3


b300


c3000


d1000


View Answer 3

Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about _____________ kms?


a0.1 to 0.5


b1.5 to 4.5


c7.5 to 12.5


d15-20


View Answer 1.5 to 4.5

The order of preference for feedstock to a catalytic reformer is _________________ ?


aCatalytic naphtha – coking naphtha – virgin naphtha


bCoking naphtha – virgin naphtha – catalytic naphtha


cVirgin naphtha – catalytic naphtha – coking naphtha


dVirgin naphtha – coking naphtha – catalytic naphtha



Deoiling of wax is done by its _________________?


aHeating


bCooling


cSolvent extraction


dBoth B. & C.


View Answer Both B. & C.

Which of the following processes is used for the production of petroleum coke ?


aStabilisation


bVisbreaking


cCracking


dReforming


View Answer Cracking

Olefins are_________________?


aSaturated hydrocarbons


bUnsaturated cyclic compounds (hydrocarbons)


cPresent in substantially good quantity in crude petroleum


dNone of these


View Answer None of these

Feedstock for polymerisation is__________________?


aNaphtha


bCracked gases rich in C2 & C4 olefins


cLow boiling aromatics


dNone of these



Octane number of gasoline produced by two stage fluidised catalytic cracking process is___________________?


a80


b87


c92


d97


View Answer 97

Which of the following is an additive used for improving the cetane number of diesel ?


aTetraethyl lead


bTetramethyllead


cEthyl nitrate or acetone


dNone of these


View Answer Tetraethyl lead

Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil__________________?


aGives higher yield of petrol


bLower octane number of petrol


cHigher sulphur content in the product


dHigher gum forming material in petrol



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