11. Main constituent of cotton fibre is
lignin
cellulose
starch
gelatine
✅ The correct answer is option B.
Polymer Technology MCQs
12. Size range of polymer molecules varies from __________ metre.
10-2 to 10-5
10-4 to 10-7
10-1 to 10-2
10-8 to 10-10
✅ The correct answer is option A.
13. Thiokol is nothing but
polysulphide rubber
polyamide fibre
engineering plastic
exponded polystyrene
✅ The correct answer is option A.
14. __________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.
Fibrous
Leathery
Rubbery
Hard
✅ The correct answer is option B.
15. Plastic articles are normally produced by __________ moulding.
green sand
injection
shell
dry sand
✅ The correct answer is option B.
16. Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent.
1-1000
1000-1500
1500-2000
2000-2500
✅ The correct answer is option A.
17. __________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR.
Percent elongation
Resilience
Freezing point
Strength
✅ The correct answer is option B.
18. 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
siloxane elastomers.
polyamides.
vinyl polymers.
urea-formaldehyde resins.
✅ The correct answer is option D.
19. Which of the following is the lowest cost plastic commercially available ?
Polythene
Teflon
Bakelite
PVC
✅ The correct answer is option A.
20. Hot drink (e.g, tea) cups are usually made of
polystyrene
polythene
polypropylene
PVC
✅ The correct answer is option A.