Polymer Technology - Study Mode

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[#141] Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is

(A) Nylon-66

(B) Teflon

(C) Polyester

(D) Bakelite

Correct Answer

(B) Teflon

[#142] Plastic tubes & pipes are generally made by __________ moulding.

(A) Injection

(B) Transfer

(C) Extrusion

(D) Compression

Correct Answer

(C) Extrusion

[#143] Polypropylene compared to polythene is

(A) Harder

(B) Stronger

(C) Lighter

(D) All of the above

Correct Answer

(D) All of the above

[#144] Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but

(A) Polyacrylonitrile

(B) Polyamide

(C) Saturated polyester

(D) Alkyd resin

Correct Answer

(A) Polyacrylonitrile

[#145] Softening point of high density polythene is about __________ °C.

(A) 85

(B) 135

(C) 165

(D) 205

Correct Answer

(B) 135