Polymer Technology problems
- 1. Dacron is a
Options- A. condensation polymerisation product of hexamethylene diamine and adipic acid.
- B. condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol.
- C. thermosetting material.
- D. none of these. Discuss
Correct Answer: none of these.
- 2. Styrene butadiene rubber (SBR) is
Options- A. a natural rubber.
- B. another name of silicone rubber.
- C. a synthetic polymer.
- D. a synthetic monomer. Discuss
Correct Answer: a synthetic polymer.
- 3. Which of the following is not a natural fibre?
Options- A. Silk
- B. Viscose rayon
- C. Wool
- D. Cotton Discuss
Correct Answer: Viscose rayon
- 4. Nylon-66 is a polyamide of
Options- A. hexamethylene diamine and adipic acid.
- B. adipic acid and methyl amine.
- C. vinyl chloride and formaldeyde.
- D. none of these. Discuss
Correct Answer: hexamethylene diamine and adipic acid.
- 5. Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their
Options- A. molecular sizes.
- B. magnitude of intermolecular forces.
- C. resistance to heat.
- D. polymerisation mechanism. Discuss
Correct Answer: magnitude of intermolecular forces.
- 6. Thermosetting plastic materials
Options- A. can be repeatedly melted.
- B. is useful for melt casting.
- C. can not be melted after forming.
- D. is useful for spinning. Discuss
Correct Answer: can not be melted after forming.
- 7. Polycaprolactum is
Options- A. nylon-6
- B. nylon-66
- C. dacron
- D. rayon Discuss
Correct Answer: nylon-6
- 8. Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically
Options- A. polymethyl methacrylate (PMMA).
- B. Polytetraflouroethylene(PTFE).
- C. polycarbonates.
- D. phenolic resins. Discuss
Correct Answer: polymethyl methacrylate (PMMA).
- 9. Polyvinyl chloride (PVC)
Options- A. is produced by polycondensation reaction.
- B. uses either emulsion or suspension polymerisation methods.
- C. can be made thermosetting by adding a plasticiser.
- D. softening temperature is 200°C. Discuss
Correct Answer: uses either emulsion or suspension polymerisation methods.
- 10. Cross linked polymers formed from bi-and trifuctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties.
Options- A. thermoplastic
- B. thermosetting
- C. elastometric
- D. brittleness Discuss
Correct Answer: elastometric
More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.