Chemical Engineering MCQs

Page No. 517

Mercaptans are added to liquefied petroleum gas (LPG) to _____________________ ?


aReduce its cost


bNarrow down its explosion limit


cAssist in checking its leakage from cylinder


dIncrease its calorific value



Research octane number refers to the___________________?


aLow octane number motor fuels


bHigh octane number motor fuels


cHigh octane number aviation fuels


dUnleaded motor fuels


View Answer Unleaded motor fuels

Which of the following is used as a catalyst in fluidised bed catalytic cracking ?


aSilica-magnesia


bSilica-alumina


cBentonite clays


dAll A., B. and C.


View Answer All A., B. and C.

Aniline point is the _________________?


aCharacteristic property of diesel & lubricating oils


bMeasure of aromatic content of oil


cBoth A. and B.


dNeither A. nor B.


View Answer Both A. and B.

Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatization by liquid SO2 extraction (Edeleanu process), its smoke point may become _______________________ mm?


a5


b10


c25


d100


View Answer 25

Smoke point of a test sample of kerosene is found to be 15 mm. On removal of ________________ from it, the smoke point rises to 25 mm?


an-paraffins


bOlefins


cAromatics


dNone of these


View Answer Aromatics

The most commonly used feed stock for the reforming reactor is ___________________?


aHeavy fuel oil


bResiduum


cStraight run gasoline


dCasing head gasoline


View Answer Straight run gasoline

Crude oils containing more than ____________ kg of total salts (expressed in terms of NaCl) per thousand barrel is called a ‘salty crude’ ?


a1


b5


c15


d25


View Answer 5

Octane number of gasoline is a measure of its__________________?


aResistance to knock


bIgnition delay


cIgnition temperature


dSmoke point


View Answer Resistance to knock

In Hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen_________________?


aEnhances the desulphurisation process


bMinimises coke formation


cBoth A. and B.


dNeither A. nor B.


View Answer Both A. and B.

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