Polymer Technology problems
- 1. The inter particle forces between linear chains in nylon-66 are __________ bonds.
Options- A. hydrogen
- B. covalant
- C. ionic
- D. none of these Discuss
Correct Answer: hydrogen
- 2. Contact lenses for eyes are made of perspex, which is nothing but
Options- A. polymethylmethacrylate
- B. polystyrene
- C. unsaturated polyester
- D. polypropylene Discuss
Correct Answer: polymethylmethacrylate
- 3. Poly Vinyl chloride (PVC) is a __________ material.
Options- A. thermoplastic
- B. thermosetting
- C. fibrous
- D. chemically active Discuss
Correct Answer: thermoplastic
- 4. Which of the following is an inorganic polymer?
Options- A. Teflon
- B. Perspex
- C. Silicones
- D. Bakelite Discuss
Correct Answer: Silicones
- 5. The physical state in which polymers exist is
Options- A. melts & rubber like state.
- B. amorphous glassy state.
- C. partially crystalline state.
- D. all (a), (b) and (c). Discuss
Correct Answer: all (a), (b) and (c).
- 6. Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are
Options- 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 Discuss
Correct Answer: 50°C and 3 - 4 kg/cm2
- 7. Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent.
Options- A. 50
- B. 75
- C. 90
- D. 99 Discuss
Correct Answer: 90
- 8. Polyurathane can not be used for making
Options- A. mattresses & foam
- B. coating material
- C. adhesives
- D. bottles Discuss
Correct Answer: bottles
- 9. Main constituent of cotton fibre is
Options- A. lignin
- B. cellulose
- C. starch
- D. gelatine Discuss
Correct Answer: cellulose
- 10. Low pressure Zeigler process of polythene manufacture
Options- A. employs a pressure of 30 kgf/cm2.
- B. achieves an yield of 95-98% based on ethylene.
- C. produces very low density polythene.
- D. does not use any catalyst for polymerisation. Discuss
Correct Answer: achieves an yield of 95-98% based on ethylene.
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