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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