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  • Question
  • Plastic tubes & pipes are generally made by __________ moulding.


  • Options
  • A. injection
  • B. transfer
  • C. extrusion
  • D. compression

  • Correct Answer
  • extrusion 


  • Polymer Technology problems


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    • 1. Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness?

    • Options
    • A. Phosphorous
    • B. Carbon black
    • C. Pine oil
    • D. Rosin
    • Discuss
    • 2. __________ is a homopolymer.

    • Options
    • A. Neoprene
    • B. Bakelite
    • C. Nylon-66
    • D. Terylene
    • Discuss
    • 3. Which of the following is not a polyolefin?

    • Options
    • A. Polystyrene
    • B. Polypropylene
    • C. Neoprene
    • D. None of these
    • Discuss
    • 4. Which of the following is not a polymer of two monomers?

    • Options
    • A. Teflon
    • B. Bakelite
    • C. SBR
    • D. None of these
    • Discuss
    • 5. Nylon 6 as compared to nylon 6, 6 has lower

    • Options
    • A. abrasion resistance.
    • B. thermal stability.
    • C. adhesion to rubber.
    • D. hardness.
    • Discuss
    • 6. Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxident used in rubber?

    • Options
    • A. Carbon
    • B. Alkylated diphenyl amine
    • C. Thiokol
    • D. Magnesium
    • Discuss
    • 7. Zeigler process

    • Options
    • A. produces high density polythene.
    • B. uses no catalyst.
    • C. produces low density polythene.
    • D. employs very high pressure.
    • Discuss
    • 8. Pick out the wrong statement.

    • Options
    • A. Polymeric fibres are never produced by addition polymerisation.
    • B. Property of tackiness is exhibited by uncured rubber.
    • C. Sharp melting point is not observed in thermoplastic polymers.
    • D. Polythene generally has an excellent resistance to ultra violet rays.
    • Discuss
    • 9. Pick out the wrong statement.

    • Options
    • A. Polystyrene is a thermoplastic polymer.
    • B. Protein is a natural polymer.
    • C. Neoprene is a natural rubber.
    • D. Polythene is a copolymer, while SBR is a homopolymer.
    • Discuss
    • 10. Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%)?

    • Options
    • A. Water impermeable cellophane
    • B. Polythene
    • C. Cellulose acetate
    • D. Teflon
    • Discuss


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