Chemical Engineering MCQs

Page No. 337

Cellulose is the main constituent of most ______________ fibres?


aAcrylic


bSpandex


cSynthetic


dNatural


View Answer Natural

The monomer of natural rubber is A. DMT ______________________?


apropane


b2 methyl-1 propane


cIsoprene


dBoth B. and C.


View Answer Both B. and C.

Starting material for the production of SBR is ____________________?


aEthyl alcohol


bEthylene


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Polymerisation process in which two or more monomers of chemically different nature take part is called__________________?


aCopolymerisation


bAddition polymerisation


cChain polymerisation


dNone of these


View Answer Copolymerisation

Tubeless tyres are made of ______________ rubber, which is a co-polymer of isoprene & isobutylene?


aNitrile


bSilicone


cNeoprene


dButyl


View Answer Butyl

All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it cannot be used for the production of plastic_______________?


aFilaments


bPipes


cBuckets


dTubings


View Answer Buckets

Plasticisers are added to synthetic plastics to ________________?


aImpart flexibility


bImprove workability during fabrication


cDevelop new improved properties not present in the original resin


dAll A., B. and C.


View Answer All A., B. and C.

Paper like thin plastic articles can be produced by_________________?


aBlow moulding


bVacuum thermo forming


cInjection moulding


dNone of these


View Answer Vacuum thermo forming

Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to _________________?


aProtect rubber goods from attack by oxygen & ozone present in the atmosphere


bReduce its viscosity to permit easier processing


cReduce the time of vulcanisation and quantity of vulcanising agent


dIncrease its viscosity



Main constituent of natural rubber is_________________?


aPolystyrene


bPolyisoprene


cPolybutadiene


dPoly chloroprene


View Answer Polyisoprene

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