Chemical Engineering MCQs

Page No. 521

Naphtha yield in straight run distillation of crude oil may be about _______________ percent?


a2


b6


c12


d18


View Answer 6

Older crude petroleum __________________?


aIs light and better


bGives more distillates


cGives less tar


dAll A., B. and C.



Pick out the undesirable property for a solvent meant for dewaxing of lube oil ?


aComplete miscibility with oil


bHigh solubility of wax in the solvent


cBoth A. and B.


dNeither A. nor B.


View Answer Both A. and B.

In sweetening process, solutizer agent used with caustic alkali is_______________?


aPotassium isobutyrate


bSodium plumbite


cMethanol


dPhenol


View Answer Potassium isobutyrate

Absolute vapor pressure of petrofuels is found by Reid bomb which is heated in water bath to 100°F. In Reid apparatus, the ratio of the volume of air chamber to that of the liquid fuel chamber is________________?


a4


b3


c2


d1


View Answer 4

Which of the following tests is not done for transformer oil ?


aFlash point and acid value


bAniline point


cDielectric strength


dCopper strip corrosion test


View Answer Aniline point

Petrolatum is__________________?


aSame as petroleum ether


bPetroleum coke


cA mixture of microcrystalline wax in viscous hydrocarbon liquids


dNone of these



Extractor temperature is maintained at -20°C in Edeleanu process to reduce the ______________ of kerosene?


aSmoke point


bParaffins


cAromatics


dNaphthenes


View Answer Paraffins

Most widely used solvent for dewaxing is__________________?


aMethyl-ethyl-ketone (MEK)


bNaphtha


cPetroleum ether


dSodium plumbite



Which of the following is not a sulphur compound present in petroleum ?


aThiophenes


bMercaptans


cSulphones


dPyrroles


View Answer Pyrroles

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