Chemical Engineering MCQs

Page No. 297

Pick out the wrong statement ?


aPolymeric fibres are never produced by addition polymerisation


bProperty of tackiness is exhibited by uncured rubber


cSharp melting point is not observed in thermoplastic polymers


dPolythene generally has an excellent resistance to ultra violet rays



Pick out the wrong statement ?


aLinear polymers are formed from bifunctional groups only and are normally thermoplastic


bCross-linked branched chain polymers are either elastometric or thermosetting


cBranching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point


dDibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction



Pick out the wrong statement ?


aCold SBR is superior as compared to hot SBR


bPolymerisation temperature can modify the properties of SBR


cProduction of cold SBR employs lower pressure as compared to that of hot SBR


dNone of these


View Answer None of these

‘Wobbe index’ is a characteristic of__________________?


aSolid fuels


bGaseous fuels


cLiquid fuels


dFat coals


View Answer Gaseous fuels

Spontaneous combustion of coal on storage results due to___________________?


aInadequate ventilation


bLow temperature oxidation


cStorage in large heaps with small surface to volume ratio


dAll A., B. and C.


View Answer All A., B. and C.

White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is_________________?


aTar


bCoke oven gas


cPitch


dPulverised coke


View Answer Coke oven gas

As the equilibrium moisture content of the coal increases, its___________________?


aCalorific value increases


bSwelling number decreases


cSwelling number increases


dBulk density decreases



Which of the following is not used as a binder in coal briquetting ?


aTar


bMolasses


cPitch


dLine


View Answer Line

Which of the following fuel gases has the highest calorific value ?


aNatural gas


bCoal bed methane (CBM)


cLiquefied petroleum gas (LPG)


dSewage gas



In Orsat’s apparatus, ammoniacal cuprous chloride is used for selectivity absorbing________________?


aCO


bCO2


cO2


dH2O


View Answer CO

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