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Polymer Technology

Polymer Technology
Lavatory cisterns are normally made of

Expanded polystyrene
Saturated polyester
Perspex
PVC

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Polymer Technology
Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are

5°C and 1 kgf/cm²
- 20°C and 1 kgf/cm²
0°C and 1 kgf/cm²
0°C and 3 kgf/cm²

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Polymer Technology
Neoprene is rendered non-inflammable, because of

Its linear chain structure
The absence of chlorine atoms in its monomer
The presence of chlorine atoms in its monomer
Its cross-linked structure

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Polymer Technology
Bakelite (phenol-formaldehyde) resin can not be used as

Decorative paint
Decorative laminates
Electrical insulation
Glass reinforced plastics

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Polymer Technology
Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent.

1-1000
1500-2000
1000-1500
2000-2500

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Polymer Technology
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C.

500-600
10-30
250-280
-5

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