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Chemical Engineering :: Polymer Technology

  1. Which of the following is an inorganic polymer ?

  2. A.
    Teflon
    B.
    Perspex
    C.
    Silicones
    D.
    Bakelite

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  3. __________ moulding is used for shaping of thermosetting plastics exclusively.

  4. A.
    Compression
    B.
    Injection
    C.
    Transfer
    D.
    Extrusion

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  5. Bristles of tooth brushes are made of

  6. A.
    nylon-6
    B.
    nylon-66
    C.
    polystyrene
    D.
    PVC

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  7. Pick out the wrong statement.

  8. A.
    Cold SBR is superior as compared to hot SBR.
    B.
    Polymerisation temperature can modify the properties of SBR.
    C.
    Production of cold SBR employs lower pressure as compared to that of hot SBR.
    D.
    None of these.

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  9. Starting material for the production of butadiene in India is

  10. A.
    naphthalene
    B.
    benzol
    C.
    ethyl alcohol
    D.
    phthalic anhydride

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  11. Liners of bags are usually made of

  12. A.
    polythene
    B.
    PVC
    C.
    polypropylene
    D.
    polyesters

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  13. Poly Vinyl chloride (PVC) is a __________ material.

  14. A.
    thermoplastic
    B.
    thermosetting
    C.
    fibrous
    D.
    chemically active

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  15. Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are

  16. A.
    50°C and 3 - 4 kg/cm2
    B.
    50°C and 1 kgf/cm2
    C.
    250°C and 10 kgf/cm2
    D.
    250°C and 1 kgf/cm2

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  17. Polystyrene is a __________ plastic at room temperature.

  18. A.
    ductile
    B.
    brittle
    C.
    malleable
    D.
    none of these

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  19. Amino resins are used in paper treatment to improve its

  20. A.
    wet tear and bursting strength.
    B.
    folding endurance
    C.
    wet rub resistance
    D.
    all (a), (b) & (c)

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