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- Question
Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.
Options- A. solid
- B. liquid
- C. combination of solid & liquid
- D. neither solid nor liquid
- Correct Answer
- combination of solid & liquid
- 1. Orlan fibre which is used as a wool sub stitute is
Options- A. an amorphous polymer.
- B. a natural polymeric fibre.
- C. polyacrylonitrile.
- D. polymethylmethacrylate (PMMA). Discuss
- 2. Automobile steering wheels are normally made of
Options- A. cellulose acetate
- B. cellulose nitrate
- C. PVC
- D. high density polythene Discuss
- 3. Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of
Options- A. cold SBR
- B. butyl rubber
- C. Bunai N
- D. Buna S Discuss
- 4. Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to
Options- A. protect rubber goods from attack by oxygen & ozone present in the atmosphere.
- B. reduce its viscosity to permit easier processing.
- C. reduce the time of vulcanisation and quantity of vulcanising agent.
- D. increase its viscosity. Discuss
- 5. 90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C.
Options- A. -5
- B. 10-30
- C. 250-280
- D. 500-600 Discuss
- 6. Cellulose is the main contituent of most __________ fibres.
Options- A. acrylic
- B. spandex
- C. synthetic
- D. natural Discuss
- 7. Mastication of rubber means
Options- A. its softening.
- B. a treatment to retard its deterioration due to oxidation.
- C. improving its curing rate.
- D. depression of its freezing point. Discuss
- 8. Trade name of __________ is neoprene.
Options- A. polychloroprene
- B. polyisoprene
- C. polytetraflouroethylene
- D. poly vinyl acetate Discuss
- 9. Caprolactum, a raw material for the manufacture of nylon-6, is produced from
Options- A. phenol
- B. naphthalene
- C. benzene
- D. pyridine Discuss
- 10. Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its
Options- A. elasticity
- B. strength
- C. plasticity
- D. weathering characteristics Discuss
Polymer Technology problems
Search Results
Correct Answer: polyacrylonitrile.
Correct Answer: cellulose acetate
Correct Answer: butyl rubber
Correct Answer: reduce its viscosity to permit easier processing.
Correct Answer: 250-280
Correct Answer: natural
Correct Answer: its softening.
Correct Answer: polychloroprene
Correct Answer: benzene
Correct Answer: weathering characteristics
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