Discussion
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- Question
Unbreakable crockeries are made from __________ polymers.
Options- A. polystyrene
- B. melamine
- C. polystyrene
- D. polyurathane
- Correct Answer
- melamine
- 1. 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
- 2. 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
- 3. Vulcanisation of rubber does not increase its
Options- A. elasticity
- B. plasticity
- C. ductility
- D. none of these Discuss
- 4. Properties of a polymer is affected by the
Options- A. chain length.
- B. intermolecular forces.
- C. branching & cross-linking.
- D. all (a), (b). Discuss
- 5. Thermosplastic materials
Options- A. do not soften on application of heat.
- B. are heavily branched molecules.
- C. are solvent insoluble.
- D. none of these. Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. Which of the following is not the commercial name of polymethylmethacrylate (PMMA)?
Options- A. Perspex
- B. Lucite
- C. Plexiglass
- D. Teflon Discuss
Polymer Technology problems
Search Results
Correct Answer: same as thermoset phenol formaldehyde.
Correct Answer: is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases.
Correct Answer: plasticity
Correct Answer: all (a), (b).
Correct Answer: none of these.
Correct Answer: 250-280
Correct Answer: Buna-S
Correct Answer: as room temperature adhesive.
Correct Answer: higher hardness.
Correct Answer: Teflon
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