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 'Workshop Instructor/ Instructor Grade II/ Demonstrator/ Draftsman Grade II in Polymer Technology' And exam conducted in the year 2023. And Question paper code was '099/2023/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-C
Question32:-During mastication of rubber
A:-viscosity decreases
B:-plasticity decreases
C:-viscosity increases
D:-no change in plasticity and viscosity
Correct Answer:- Option-A
Question33:-Zinc oxide and stearic acid are added as in sulphur curing
system.
A:-Accelerators
B:-Antioxidants
C:-Retarders
D:-Co-activators
Correct Answer:- Option-D
Question34:-Which is a chemical blowing agent?
A:-Sodium bicarbonate
B:-Calcium carbonate
C:-Calcium silicate
D:-Chromium oxide
Correct Answer:- Option-A
Question35:-Which type of sulphur vulcanisation system provide resistance to
thermal oxidation?
A:-Conventional vulcanisation system
B:-Un-accelerated sulphur vulcanisation system
C:-Semi-efficient vulcansiation system
D:-Efficient vulcanisation system
Correct Answer:- Option-D
Question36:-Among the following, which accelerator is used in room temperature
vulcanisation?
A:-Zinc diethyl dithiocarbamate
B:-Sodium isopropyl xanthate
C:-Zinc salt of mercaptobenzothiazole
D:-Tetra methyl thiuram disulphide
Correct Answer:- Option-B
Question37:-Saturated rubbers are cross-linked by
A:-Sulphur vulcanisation
B:-Sulhurless vulcanisation