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- Question
In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres.
Options- A. viscose rayon
- B. acrylic
- C. polyvinyl acetate
- D. saturated polyester
- Correct Answer
- saturated polyester
- 1. Density of low density polythene is about __________ gm/c.c.
Options- A. 0.38
- B. 0.56
- C. 0.81
- D. 0.91 Discuss
- 2. Polyvinyl acetate is never used for making
Options- A. moulded articles
- B. fibres
- C. adhesives
- D. all (a), (b) & (c) Discuss
- 3. Pick out the wrong statement.
Options- A. Addition polymers are generally formed by chain growth polymerisation.
- B. Condensation polymers are generally formed by step growth polymerisation.
- C. Teflon is formed by step growth polymerisation.
- D. Bakelite is formed by step growth polymerisation. Discuss
- 4. Which of the following is not a natural polymer?
Options- A. Nucleic acids e.g. RNA and DNA
- B. Polysaccharides
- C. Polyisoprene
- D. Polyurethane Discuss
- 5. Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
Options- A. acrylic
- B. polyester
- C. nylon 6:6
- D. polypropylene Discuss
- 6. 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?
Options- A. Ethylene glycol
- B. Stearic acid estors
- C. Tricresyl phosphate
- D. Esters of phthalic acid Discuss
- 7. Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is
Options- A. nylon-66
- B. teflon
- C. polyester
- D. bakelite Discuss
- 8. 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
Options- A. polyvinyl alcohol
- B. polyvinyl acetale
- C. polyvinyl butyral
- D. PVC Discuss
- 9. Styrene butadiene rubber (SBR) is never used for making
Options- A. coated fabrics
- B. front wheel tyres of aeroplanes (i.e., heavy duty tyres)
- C. gaskets
- D. soles of shoes Discuss
- 10. Which of the following is generally not drawn into fibre?
Options- A. Polyamide
- B. Unsaturated polyesters
- C. Saturated polyesters
- D. Polyacrylonitrile Discuss
Polymer Technology problems
Search Results
Correct Answer: 0.91
Correct Answer: moulded articles
Correct Answer: Teflon is formed by step growth polymerisation.
Correct Answer: Polyurethane
Correct Answer: acrylic
Correct Answer: Ethylene glycol
Correct Answer: teflon
Correct Answer: polyvinyl butyral
Correct Answer: front wheel tyres of aeroplanes (i.e., heavy duty tyres)
Correct Answer: Unsaturated polyesters
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