Chemical Engineering MCQs

Page No. 354

Orlan fibre which is used as a wool substitute is __________________?


aAn amorphous polymer


bA natural polymeric fibre


cPolyacrylonitrile


dPoly-methyl-methacrylate (PMMA)


View Answer Polyacrylonitrile

Teflon is__________________?


aPhenol formaldehyde


bAn inorganic polymer


cPolytetrafluroethylene (PTFE)


dA monomer



The main use of butadiene is____________________?


aAs a plasticiser for unsaturated polyester


bIn the manufacture of synthetic rubber


cAs an anti-skimming agent in paint


dNone of these



In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for _______________ fibres?


aPolythene


bPVC


cRayon


dPolyvinyl acetate


View Answer PVC

Automobile steering wheels are normally made of__________________?


aCellulose acetate


bCellulose nitrate


cPVC


dHigh density polythene


View Answer Cellulose acetate

Tyres are made by___________________?


aInjection moulding


bExtrusion


cRotational moulding


dCompression moulding


View Answer Rotational moulding

Celluloid is__________________?


aCellulose acetate


bRegenerated cellulose


cCellulose nitrate


dCellulose acetate butyrate


View Answer Cellulose nitrate

Cation exchange resins used in water treatment is made from _____________ resin?


aUrea formaldehyde


bEpoxy


cAmino


dPhenolic


View Answer Urea formaldehyde

Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its_________________?


aElasticity


bStrength


cPlasticity


dWeathering characteristics



Silicone resins, which are highly water repellent and has good heat resistance cannot be used___________________?


aAs room temperature adhesive


bAs grease & lubricant


cHydraulic fluid for heat transfer


dResin for lamination



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