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Polymer Technology

Polymer Technology
__________ moulding is used for shaping of thermosetting plastics exclusively.

Injection
Compression
Extrusion
Transfer

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Polymer Technology
Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex?

Potassium alum
Ammonium alum
Neither A nor B
Both A & B

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Polymer Technology
Epoxy resin is

Not used for surface coating
A polyester
An elastomer
A good abrasive

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Polymer Technology
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic

Pipes
Buckets
Filaments
Tubings

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Polymer Technology
Buna-S is a __________ material.

Rubbery
Resinous
Plastic
Fibrous

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Polymer Technology
A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of

Urea-formaldehyde resins
Vinyl polymers
Polyamides
Siloxane elastomers

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