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Chemical Engineering :: Polymer Technology

  1. Addition polymerisation is not involved in the manufacture of

  2. A.
    low density polythene.
    B.
    poly vinyl chloride.
    C.
    polystyrene.
    D.
    polyhexamethylene adipamide.

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  3. Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are

  4. A.
    5°C and 1 kgf/cm2.
    B.
    - 20°C and 1 kgf/cm2.
    C.
    0°C and 1 kgf/cm2.
    D.
    0°C and 3 kgf/cm2.

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  5. Most of the plastics are safe to be used upto a maximum temperature of __________ °C.

  6. A.
    100
    B.
    150
    C.
    350
    D.
    450

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  7. __________ is a homopolymer.

  8. A.
    Neoprene
    B.
    Bakelite
    C.
    Nylon-66
    D.
    Terylene

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  9. Plastic tubes & pipes are generally made by __________ moulding.

  10. A.
    injection
    B.
    transfer
    C.
    extrusion
    D.
    compression

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  11. Pick out the correct statement.

  12. A.
    Plastics are good conductors of heat and electricity.
    B.
    All the polymers are highly crystalline in nature
    C.
    Polymers can be vaporised by heating to a very high temperature.
    D.
    The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation.

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  13. Condensation polymerisation is not involved in the manufacture of

  14. A.
    teflon
    B.
    polythene
    C.
    terylene
    D.
    nylon

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  15. Glyptal used in the manufacture of paints & lacquers is a __________ polymer.

  16. A.
    polyamide
    B.
    polystyrene
    C.
    polyester
    D.
    polyacrylonitrile

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  17. Addition of stabiliser during PVC manufacture is done to

  18. A.
    improve its impact strength.
    B.
    improve its elasticity.
    C.
    reduce the melt viscosity & glass transition temperature.
    D.
    prevent its thermal degradation.

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  19. Which of the following is not a polyolefin ?

  20. A.
    Polystyrene
    B.
    Polypropylene
    C.
    Neoprene
    D.
    None of these

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