Polymer Technolgy MCQs

Question 1

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

Accepted Answer

250-280

Answer

-5

Answer

10-30

Answer

500-600

Question 2

Most of the plastics are safe to be used upto a maximum temperature of __________ °C.

Accepted Answer

150

Answer

100

Answer

350

Answer

450

Question 3

A copolymer is formed by the combination of two or more monomer molecules

Accepted Answer

In a chain without the elimination of water

Answer

With the elimination of small amount of water

Answer

Of the same monomer by elimination of small molecules of water

Answer

None of these

Question 4

Orlan fibre which is used as a wool sub stitute is

Accepted Answer

Polyacrylonitrile

Answer

An amorphous polymer

Answer

A natural polymeric fibre

Answer

Polymethylmethacrylate (PMMA)

Question 5

Zeigler - Natta catalyst (AlR 3 - AlCl 3 ) is used in the polymerisation of

Accepted Answer

Propylene

Answer

Vinyl acetate

Answer

Vinyl chloride

Answer

Styrene

Question 6

Size range of polymer molecules varies from __________ metre.

Accepted Answer

10 -2 to 10 -5

Answer

10 -4 to 10 -7

Answer

10 -1 to 10 -2

Answer

10 -8 to 10 -10

Question 7

__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.

Accepted Answer

Leathery

Answer

Fibrous

Answer

Rubbery

Answer

Hard

Question 8

A copolymer of vinyl and vinylidine chloride is called

Accepted Answer

Saran

Answer

Treylene

Answer

Orlon

Answer

Dacron

Question 9

Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.

Accepted Answer

Polyacrylonitrile

Answer

Nylon

Answer

Polypropylene

Answer

Polyester