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Polymer Technology
Comments
Question
Mastication of rubber means
Options
A. its softening.
B. a treatment to retard its deterioration due to oxidation.
C. improving its curing rate.
D. depression of its freezing point.
Correct Answer
its softening.
Polymer Technology problems
Search Results
1. Cellulose is the main contituent of most __________ fibres.
Options
A. acrylic
B. spandex
C. synthetic
D. natural
Show Answer
Scratch Pad
Discuss
Correct Answer: natural
2. Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.
Options
A. solid
B. liquid
C. combination of solid & liquid
D. neither solid nor liquid
Show Answer
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Discuss
Correct Answer: combination of solid & liquid
3. Orlan fibre which is used as a wool sub stitute is
Options
A. an amorphous polymer.
B. a natural polymeric fibre.
C. polyacrylonitrile.
D. polymethylmethacrylate (PMMA).
Show Answer
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Discuss
Correct Answer: polyacrylonitrile.
4. Automobile steering wheels are normally made of
Options
A. cellulose acetate
B. cellulose nitrate
C. PVC
D. high density polythene
Show Answer
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Discuss
Correct Answer: cellulose acetate
5. Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of
Options
A. cold SBR
B. butyl rubber
C. Bunai N
D. Buna S
Show Answer
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Discuss
Correct Answer: butyl rubber
6. Trade name of __________ is neoprene.
Options
A. polychloroprene
B. polyisoprene
C. polytetraflouroethylene
D. poly vinyl acetate
Show Answer
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Discuss
Correct Answer: polychloroprene
7. Caprolactum, a raw material for the manufacture of nylon-6, is produced from
Options
A. phenol
B. naphthalene
C. benzene
D. pyridine
Show Answer
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Discuss
Correct Answer: benzene
8. Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its
Options
A. elasticity
B. strength
C. plasticity
D. weathering characteristics
Show Answer
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Discuss
Correct Answer: weathering characteristics
9. __________ tubes are good substitude for human blood vessels onrheart by-pass operation.
Options
A. PVC
B. Polythene
C. Teflon/dacron
D. Polystyrene
Show Answer
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Discuss
Correct Answer: Teflon/dacron
10. Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is
Options
A. chloroethane
B. chlorophrene
C. isoprene
D. none of these
Show Answer
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Discuss
Correct Answer: chlorophrene
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