181. Cross linked polymers are
thermoplastic
thermosetting
either (a) or (b)
fibres only
✅ The correct answer is option B.
Polymer Technology MCQs
182. In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres.
viscose rayon
acrylic
polyvinyl acetate
saturated polyester
✅ The correct answer is option D.
183. Cross linked polymers formed from bi-and trifuctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties.
thermoplastic
thermosetting
elastometric
brittleness
✅ The correct answer is option C.
184. Most of the plastics are safe to be used upto a maximum temperature of __________ °C.
100
150
350
450
✅ The correct answer is option B.
185. Collapsible tubes for tooth paste are produced by __________ extrusion.
direct
indirect
impact
none of these
✅ The correct answer is option C.
186. Nylon-6 as compared to nylon-66 is
harder.
more abrasion resistant.
having higher melting point.
none of these.
✅ The correct answer is option D.
187. Which of the following polymers does not belong to the class of polyacrylate polymer ?
PMMA
Polyacrylonitrile
Polyethyl acrylate
None of these
✅ The correct answer is option D.
188. Catalyst used in the production of high density polythene by low pressure Ziegler process is
aluminium triethyl activated with TiCl4
platinum
molybdenum
Nickel
✅ The correct answer is option A.
189. Cation exchange resins used in water treatment is made from __________ resin.
urea formaldehyde
epoxy
amino
phenolic
✅ The correct answer is option A.
190. Vulcanisation of raw rubber makes it
soft
less elastic
plastic
tacky
✅ The correct answer is option B.