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Chemical Engineering :: Polymer Technology

  1. Which of the following is not the commercial name of polymethylmethacrylate (PMMA) ?

  2. A.
    Perspex
    B.
    Lucite
    C.
    Plexiglass
    D.
    Teflon

  3. Density of low density polythene is about __________ gm/c.c.

  4. A.
    0.38
    B.
    0.56
    C.
    0.81
    D.
    0.91

  5. In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is

  6. A.
    terylene
    B.
    polybutadiene
    C.
    PVC
    D.
    polypropylene

  7. Gutta parcha rubber is

  8. A.
    soft & tacky at room temperature.
    B.
    an isomer of natural rubber.
    C.
    a thermosetting resin.
    D.
    recovered by coagulation of rubber latex.

  9. The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is

  10. A.
    polyvinyl alcohol
    B.
    polyvinyl acetale
    C.
    polyvinyl butyral
    D.
    PVC

  11. Polyhexamethylene adipimide is also known as

  12. A.
    bakelite
    B.
    nylon-66
    C.
    epoxy resin
    D.
    silicone rubber

  13. Unbreakable crockeries are made from __________ polymers.

  14. A.
    polystyrene
    B.
    melamine
    C.
    polystyrene
    D.
    polyurathane

  15. __________ is normally used for the manufacture of refrigerator components and transistor parts.

  16. A.
    Polyproylene
    B.
    Polystyrene
    C.
    Polyester
    D.
    Polyurathene

  17. Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?

  18. A.
    Ethylene glycol
    B.
    Stearic acid estors
    C.
    Tricresyl phosphate
    D.
    Esters of phthalic acid

  19. Bakelite is

  20. A.
    same as polytetra flouro ethylene (PTFE).
    B.
    an inorganic polymer.
    C.
    same as thermoset phenol formaldehyde.
    D.
    not a polymer.