Polymer Technology problems
- 1. Synthetic rubber
Options- A. deforms, if stretched to double of its original dimension.
- B. is brittle at low temperature
- C. is softer at higher temperature.
- D. is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases. Discuss
Correct Answer: is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases.
- 2. Bakelite is
Options- A. same as polytetra flouro ethylene (PTFE).
- B. an inorganic polymer.
- C. same as thermoset phenol formaldehyde.
- D. not a polymer. Discuss
Correct Answer: same as thermoset phenol formaldehyde.
- 3. Unbreakable crockeries are made from __________ polymers.
Options- A. polystyrene
- B. melamine
- C. polystyrene
- D. polyurathane Discuss
Correct Answer: melamine
- 4. Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.
Options- A. -20 to 25
- B. 50 to 75
- C. 100 to 150
- D. 250-280 Discuss
Correct Answer: 250-280
- 5. In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?
Options- A. PTFE
- B. Buna-S
- C. PMMA
- D. Polycaprolactum Discuss
Correct Answer: Buna-S
- 6. Silicone resins, which are highly water repellant and has good heat resistance can not be used
Options- A. as room temperature adhesive.
- B. as grease & lubricant.
- C. hydraulic fluid for heat transfer.
- D. resin for lamination. Discuss
Correct Answer: as room temperature adhesive.
- 7. Nylon-66 compared to nylon-6 has
Options- A. lower melting point.
- B. more abrasion resistant properties.
- C. higher hardness.
- D. all (a), (b) and (c). Discuss
Correct Answer: higher hardness.
- 8. Which of the following is not the commercial name of polymethylmethacrylate (PMMA)?
Options- A. Perspex
- B. Lucite
- C. Plexiglass
- D. Teflon Discuss
Correct Answer: Teflon
- 9. Which of the following is a copolymer?
Options- A. Polystyrene
- B. SBR
- C. P.T.F.E.
- D. Polypropylene Discuss
Correct Answer: SBR
- 10. Which of the following rubbers has the widest service temperature range (-75 to 275°C)?
Options- A. Butyl rubber
- B. Silicon rubber
- C. Nitrile rubber
- D. Silicone rubber Discuss
Correct Answer: Silicone rubber
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