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Polymer Technology
Comments
Question
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).
Correct Answer
all (a), (b) and (c).
Polymer Technology problems
Search Results
1. Which of the following is an inorganic polymer?
Options
A. Teflon
B. Perspex
C. Silicones
D. Bakelite
Show Answer
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Discuss
Correct Answer: Silicones
2. Poly Vinyl chloride (PVC) is a __________ material.
Options
A. thermoplastic
B. thermosetting
C. fibrous
D. chemically active
Show Answer
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Discuss
Correct Answer: thermoplastic
3. Contact lenses for eyes are made of perspex, which is nothing but
Options
A. polymethylmethacrylate
B. polystyrene
C. unsaturated polyester
D. polypropylene
Show Answer
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Discuss
Correct Answer: polymethylmethacrylate
4. The inter particle forces between linear chains in nylon-66 are __________ bonds.
Options
A. hydrogen
B. covalant
C. ionic
D. none of these
Show Answer
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Discuss
Correct Answer: hydrogen
5. Which of the following is an elastomer?
Options
A. Thiokol
B. Phenol formaldehyde
C. Urea formaldehyde
D. Polystyrene
Show Answer
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Discuss
Correct Answer: Thiokol
6. Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are
Options
A. 50°C and 3 - 4 kg/cm
2
B. 50°C and 1 kgf/cm
2
C. 250°C and 10 kgf/cm
2
D. 250°C and 1 kgf/cm
2
Show Answer
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Discuss
Correct Answer: 50°C and 3 - 4 kg/cm
2
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
Show Answer
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Discuss
Correct Answer: 90
8. Polyurathane can not be used for making
Options
A. mattresses & foam
B. coating material
C. adhesives
D. bottles
Show Answer
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Discuss
Correct Answer: bottles
9. Main constituent of cotton fibre is
Options
A. lignin
B. cellulose
C. starch
D. gelatine
Show Answer
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Discuss
Correct Answer: cellulose
10. Low pressure Zeigler process of polythene manufacture
Options
A. employs a pressure of 30 kgf/cm
2
.
B. achieves an yield of 95-98% based on ethylene.
C. produces very low density polythene.
D. does not use any catalyst for polymerisation.
Show Answer
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Discuss
Correct Answer: achieves an yield of 95-98% based on ethylene.
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