221. Linear polymers are normally
thermosetting.
thermosplastic.
elastometric.
having extremely high softening point.
✅ The correct answer is option B.
Polymer Technology MCQs
222. Buna-N is also called
butyl rubber
nitrile rubber
neoprene
thiokol
✅ The correct answer is option B.
223. Nylon-66 compared to nylon-6 has
lower melting point.
more abrasion resistant properties.
higher hardness.
all (a), (b) and (c).
✅ The correct answer is option C.
224. Trade name of __________ is neoprene.
polychloroprene
polyisoprene
polytetraflouroethylene
poly vinyl acetate
✅ The correct answer is option A.
225. Valcunisation of rubber decreases its
tensile strength.
resistance to organic solvents.
tackiness.
working temperature range.
✅ The correct answer is option C.
226. Benzoyl chloride is not used as a catalyst in the manufacture of
polystyrene
polyvinyl acetate
polypropylene
polyvinyl chloride-co-vinylacetate
✅ The correct answer is option C.
227. Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.
improving the stretchability
dyeing/colouring
detergent solution washing
glycol soaking
✅ The correct answer is option C.
228. Density of high density polythene is about __________ gm/c.c.
1.18
1.05
0.95
0.99
✅ The correct answer is option C.
229. Polypropylene compared to polythene is
harder
stronger
lighter
all (a), (b) and (c)
✅ The correct answer is option D.
230. Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is
Ni
V2O5
Fe
aluminium triethyl combined with titanium tetrachloride
✅ The correct answer is option D.