Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Lecturer in Polymer Technology (Polytechnics)' And exam conducted in the year 2023. And Question paper code was '120/2023/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was ''. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
B:-Anions
C:-Electrophilic addition and cyclisation
D:-Electrophilic addition only
Correct Answer:- Option-C
Question35:-When you get ethylene based rubbers, the resulting polymer gets a Tg
above that of PE (assuming it to around -80C). This is because
A:-rubberiness is achieved by breaking the crystallization of PE by adding
bulky side chains
B:-the resulting polymer has lesser inter chain attractions
C:-rubberiness leads to reduction in Tg
D:-the resulting polymer had more inter chain attractions than PE
Correct Answer:- Option-A
Question36:-Apart from ageing resistance, anti oxidants may improve
A:-Fatigue and abrasion resistance
B:-Tensile strength
C:-Hardness
D:-Tear resistance
Correct Answer:- Option-A
Question37:-High molecular weight in polymer chains lead to higher viscosity
because of
A:-Vander Waals forces
B:-More entanglements between chains above a critical molecular weight
C:-Crystallinity
D:-Crosslinking
Correct Answer:- Option-B
Question38:-Often, high temperature polymers will also be highly rigid because
A:-They are highly cross linked
B:-They often have aromatic rings in the main chain (brydson, plastics
materials p 584)
C:-They have high decomposition temperatures
D:-They have too much of interchain attractions
Correct Answer:- Option-B
Question39:-Among the following high temperature plastics has some
crystallizing tendency
A:-Poly sulphone
B:-PEEK
C:-Polyimide