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 '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.
Correct Answer:- Option-B
Question21:-Natural rubber is chemically known as
A:-Cis-1,4 polyisoprene
B:-Trans-1,4 polyisoprene
C:-Cis-1,3 polyisoprene
D:-Trans-1,3 polyisoprene
Correct Answer:- Option-A
Question22:-What is the role of ammonia in latex preservation?
A:-Use as a bactericide
B:-Enhances the colloidal stability of latex
C:-Deactivates harmful metal ions
D:-All the above
Correct Answer:- Option-D
Question23:-In the latex concentration methods, which process involve only the
removal of water
A:-Evaporation
B:-Electrodecantation
C:-Creaming
D:-Centrifuging
Correct Answer:- Option-A
Question24:-Which rubber among the following is used in products for which
lightness of colour is important?
A:-Ribbed smoke sheets
B:-pale crepe rubber
C:-Brown and Blanket Crepes
D:-Michelin sheets
Correct Answer:- Option-B
Question25:-The rubber containing 20% to 30% of an aromatic or naphthenic
process oil is called
A:-Peptized Rubber
B:-Deproteinized Natural Rubber
C:-Oil-extended Natural Rubber
D:-Tire Rubber
Correct Answer:- Option-C
Question26:-The principle of the Reclaiming processes is
A:-Vulcanization
B:-Devulcanization