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Polymer Technology
Comments
Question
Polyurathane can not be used for making
Options
A. mattresses & foam
B. coating material
C. adhesives
D. bottles
Correct Answer
bottles
Polymer Technology problems
Search Results
1. 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
Scratch Pad
Discuss
Correct Answer: 90
2. 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
Scratch Pad
Discuss
Correct Answer: 50°C and 3 - 4 kg/cm
2
3. 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).
Show Answer
Scratch Pad
Discuss
Correct Answer: all (a), (b) and (c).
4. Which of the following is an inorganic polymer?
Options
A. Teflon
B. Perspex
C. Silicones
D. Bakelite
Show Answer
Scratch Pad
Discuss
Correct Answer: Silicones
5. Poly Vinyl chloride (PVC) is a __________ material.
Options
A. thermoplastic
B. thermosetting
C. fibrous
D. chemically active
Show Answer
Scratch Pad
Discuss
Correct Answer: thermoplastic
6. Main constituent of cotton fibre is
Options
A. lignin
B. cellulose
C. starch
D. gelatine
Show Answer
Scratch Pad
Discuss
Correct Answer: cellulose
7. 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.
8. Viscose rayon is
Options
A. cellulose nitrate
B. regenerated cellulose nitrate
C. regenerated cellulose acetate
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer: none of these
9. Molecular weight of polymers are in the range of
Options
A. 10 to 10
3
B. 10
2
-10
7
C. 10
7
-10
9
D. 10
9
-10
11
Show Answer
Scratch Pad
Discuss
Correct Answer: 10
2
-10
7
10. Diphenylamine is added to rubber to
Options
A. valcanise it.
B. protect it from deterioration on exposure to air.
C. make it non-inflammable.
D. make it thermosetting.
Show Answer
Scratch Pad
Discuss
Correct Answer: protect it from deterioration on exposure to air.
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