Kerala PSC Previous Years Question Paper & Answer
Page:12
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Assistant Director (Plastic)' And exam conducted in the year 2023. And Question paper code was '139/2023/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.
Question60:-What is the role of Vulcastab L.S in casted latex products?
A:-Stabilizer
B:-Vulcanizing agent
C:-Wetting agent
D:-Antioxidant
Correct Answer:- Option-C
Question61:-Polypropylene produced commercially using a Ziegler-Natta catalyst is
predominantly
A:-Atactic
B:-Syndiotactic
C:-Isotactic
D:-Crosslinked
Correct Answer:- Option-C
Question62:-The characteristics of condensation polymerization are given below
(1) Only -C-C- linkages present in the polymer structure
(ii) Use of bifunctional of polyfunctional monomers
(111) Elimination of a small by product molecule
Which of the following is true?
A:-(i), (ii), (iii)
B:-(ii) and (iii)
C:-(i) and (ii)
D:-Only (iii)
Correct Answer:- Option-B
Question63:-As the polymer crystallinity increases, the brittleness of polymer
A:-Increases
B:-Decreases
C:-Depends in length of branching in polymer
D:-Remains constants
Correct Answer:- Option-A
Question64:-Consider the following two transitions from the "solid" to the liquid or
rubbery state shown below on a plot of specific volume (Vs) vs temperature (T)
A:-The transition X is Glass transition temperature (Tg) while transition Y is
crystalline melting point (Tm)
B:-The transition X is crystalline melting point (Tm) while transition Y is Glass