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  • Question
  • Mastication of rubber means


  • Options
  • A. its softening.
  • B. a treatment to retard its deterioration due to oxidation.
  • C. improving its curing rate.
  • D. depression of its freezing point.

  • Correct Answer
  • its softening. 


  • Polymer Technology problems


    Search Results


    • 1. Cellulose is the main contituent of most __________ fibres.

    • Options
    • A. acrylic
    • B. spandex
    • C. synthetic
    • D. natural
    • Discuss
    • 2. Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.

    • Options
    • A. solid
    • B. liquid
    • C. combination of solid & liquid
    • D. neither solid nor liquid
    • Discuss
    • 3. Orlan fibre which is used as a wool sub stitute is

    • Options
    • A. an amorphous polymer.
    • B. a natural polymeric fibre.
    • C. polyacrylonitrile.
    • D. polymethylmethacrylate (PMMA).
    • Discuss
    • 4. Automobile steering wheels are normally made of

    • Options
    • A. cellulose acetate
    • B. cellulose nitrate
    • C. PVC
    • D. high density polythene
    • Discuss
    • 5. Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of

    • Options
    • A. cold SBR
    • B. butyl rubber
    • C. Bunai N
    • D. Buna S
    • Discuss
    • 6. Trade name of __________ is neoprene.

    • Options
    • A. polychloroprene
    • B. polyisoprene
    • C. polytetraflouroethylene
    • D. poly vinyl acetate
    • Discuss
    • 7. Caprolactum, a raw material for the manufacture of nylon-6, is produced from

    • Options
    • A. phenol
    • B. naphthalene
    • C. benzene
    • D. pyridine
    • Discuss
    • 8. Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its

    • Options
    • A. elasticity
    • B. strength
    • C. plasticity
    • D. weathering characteristics
    • Discuss
    • 9. __________ tubes are good substitude for human blood vessels onrheart by-pass operation.

    • Options
    • A. PVC
    • B. Polythene
    • C. Teflon/dacron
    • D. Polystyrene
    • Discuss
    • 10. Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is

    • Options
    • A. chloroethane
    • B. chlorophrene
    • C. isoprene
    • D. none of these
    • Discuss


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