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Chemical Engineering :: Polymer Technology

  1. The inter particle forces between linear chains in nylon-66 are __________ bonds.

  2. A.
    hydrogen
    B.
    covalant
    C.
    ionic
    D.
    none of these

  3. Molecular weight of polymers are in the range of

  4. A.
    10 to 103
    B.
    102-107
    C.
    107-109
    D.
    109-1011

  5. The physical state in which polymers exist is

  6. A.
    melts & rubber like state.
    B.
    amorphous glassy state.
    C.
    partially crystalline state.
    D.
    all (a), (b) and (c).

  7. Orlon is

  8. A.
    a copolymer.
    B.
    a condensation polymer.
    C.
    obtained by polymerising vinyl cyanide.
    D.
    all (a), (b) and (c).

  9. Acrylonitrile-butadiene-styrene (ABS) copolymer, which is produced by blending styrene-acrylonitfile copolymer with butadiene based elastomer, is a/an

  10. A.
    rigid foam
    B.
    engineering plastic
    C.
    thermosetting polymer
    D.
    spongy rubber

  11. Contact lenses for eyes are made of perspex, which is nothing but

  12. A.
    polymethylmethacrylate
    B.
    polystyrene
    C.
    unsaturated polyester
    D.
    polypropylene

  13. The repeating units of PTFE are

  14. A.
    Cl2CH-CH3
    B.
    F2 C = CF2
    C.
    F3 C-CF3
    D.
    FClC = CF2

  15. Low pressure Zeigler process of polythene manufacture

  16. A.
    employs a pressure of 30 kgf/cm2.
    B.
    achieves an yield of 95-98% based on ethylene.
    C.
    produces very low density polythene.
    D.
    does not use any catalyst for polymerisation.

  17. __________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol).

  18. A.
    Unsaturated polyester
    B.
    Alkyd resins
    C.
    Saturated polyester
    D.
    Amino resins

  19. Which of the following is an elastomer ?

  20. A.
    Thiokol
    B.
    Phenol formaldehyde
    C.
    Urea formaldehyde
    D.
    Polystyrene