Chemical Engineering MCQs

Page No. 328

Polyvinyl chloride (PVC) ____________________?


aIs produced by Polycondensation reaction


bUses either emulsion or suspension polymerisation methods


cCan be made thermosetting by adding a plasticiser


dSoftening temperature is 200°C



Polyurethane cannot be used to make____________________?


aAutomobile cushion


bThermal insulation in refrigerator


cCoating and adhesive


dFibre reinforced plastic (FRP)



Thermosetting plastic materials___________________?


aCan be repeatedly melted


bIs useful for melt casting


cCannot be melted after forming


dIs useful for spinning



Dacron is a _____________________________?


aCondensation polymerisation product of Hexamethylene diamine and adipic acid


bCondensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol


cThermosetting material


dNone of these


View Answer None of these

Collapsible tubes for tooth paste are produced by _____________ extrusion?


aDirect


bIndirect


cImpact


dNone of these


View Answer Impact

Polymethyl methacrylate (PMMA) which is also known as Perspex and is produced by bulk polymerisation of methyl methacrylate is not a ______________ polymer?


aThermoplastic


bThermosetting


cLinear


dGlass like transparent


View Answer Thermosetting

Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation ?


aPVC


bBakelite


cPTFE


dEpoxy resin


View Answer PVC

Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their________________?


aMolecular sizes


bMagnitude of intermolecular forces


cResistance to heat


dPolymerisation mechanism



Terylene is a/an_________________?


aAddition polymer


bPoly amide


cHomopolymer


dNone of these


View Answer None of these

____________ is a copolymer?


aStyrene butadiene rubber (SBR)


bNeoprene


cPVC


dNone of these



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