Chemical Engineering - Polymer Technology

6. 

Lavatory cisterns are normally made of

A. expanded polystyrene
B. saturated polyester
C. perspex
D. PVC

Answer: Option A

Explanation:

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7. 

Plasticisers are added to synthetic plastics to

A. impart flexibility.
B. improve workability during fabrication.
C. develop new improved properties not present in the original resin.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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8. 

Cellulose is the main contituent of most __________ fibres.

A. acrylic
B. spandex
C. synthetic
D. natural

Answer: Option D

Explanation:

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9. 

__________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.

A. Epoxy
B. Amino
C. Alkyd
D. Phenolic

Answer: Option B

Explanation:

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10. 

__________ tubes are good substitude for human blood vessels onrheart by-pass operation.

A. PVC
B. Polythene
C. Teflon/dacron
D. Polystyrene

Answer: Option C

Explanation:

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