Polymer Technology problems
- 1. In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher
Options- A. densities
- B. melting point
- C. tensile strength
- D. hardness, rigidity & brittleness Discuss
Correct Answer: hardness, rigidity & brittleness
- 2. Nylon-66 is manufactured from
Options- A. adipic acid and hexamenthylene diamine.
- B. caprolactum.
- C. maleic anhydride and hexamethylene diamine.
- D. dimethyl terephthalate (DMT) and ethylene glycol. Discuss
Correct Answer: adipic acid and hexamenthylene diamine.
- 3. Cation exchange resins used in water treatment is made from __________ resin.
Options- A. urea formaldehyde
- B. epoxy
- C. amino
- D. phenolic Discuss
Correct Answer: urea formaldehyde
- 4. Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
Options- A. acrylic
- B. polyester
- C. nylon 6:6
- D. polypropylene Discuss
Correct Answer: acrylic
- 5. Which of the following is not a natural polymer?
Options- A. Nucleic acids e.g. RNA and DNA
- B. Polysaccharides
- C. Polyisoprene
- D. Polyurethane Discuss
Correct Answer: Polyurethane
- 6. Pick out the wrong statement.
Options- A. Addition polymers are generally formed by chain growth polymerisation.
- B. Condensation polymers are generally formed by step growth polymerisation.
- C. Teflon is formed by step growth polymerisation.
- D. Bakelite is formed by step growth polymerisation. Discuss
Correct Answer: Teflon is formed by step growth polymerisation.
- 7. Polyvinyl acetate is never used for making
Options- A. moulded articles
- B. fibres
- C. adhesives
- D. all (a), (b) & (c) Discuss
Correct Answer: moulded articles
- 8. Density of low density polythene is about __________ gm/c.c.
Options- A. 0.38
- B. 0.56
- C. 0.81
- D. 0.91 Discuss
Correct Answer: 0.91
- 9. In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres.
Options- A. viscose rayon
- B. acrylic
- C. polyvinyl acetate
- D. saturated polyester Discuss
Correct Answer: saturated polyester
- 10. Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser?
Options- A. Ethylene glycol
- B. Stearic acid estors
- C. Tricresyl phosphate
- D. Esters of phthalic acid Discuss
Correct Answer: Ethylene glycol
More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.