Kerala PSC Tradesman Polymer Technology Paper 2016

Kerala Public Service Commission Tradesman Polymer Technology Paper 2016

The name of process of controlled wounding on rubber tree for extraction of latex is
(a) Picking
(b) Sheeting
(c) Cutting
(d) Tapping

The grade of rubber sheet which is used mainly for tyre manufacturing is 1
(a) Lot
(b) Off grade
(c) RSS-1
(d) RSS-4

The name of the plastic which is used for mineral water and carbonized beverage bottles
(a) Polythene
(b) Poly propelene
(c) PET
(d) PVC

What is the name of fibre which is extracted from coconut husk ?
(a) Coir
(b) Jute
(c) Cotton
(d) Linen

__________ is a commodity plastic
(a) PET
(b) Teflon
(c) Acrylic
(d) Polythene

____________ is the ISNR grade which doesn’t show storage hardness
(a) ISNR-50
(b) ISNR-20
(c) ISNR-3
(d) ISNR-3 CV

Rain gardening is used in rubber tree for ____________
(a) Tapping in rainy season
(b) Growing in rainy season
(c) Organic farming in rainy season
(d) Protect sheet rubber from rain

What type of printing in plastic are used for multy colour photo graphic design pictures in branded multi layer plastic sheet packets ?
(a) Screen printing
(b) Graviour
(c) Flexographic printing
(d) None of these

What is the scientific name of rubber yielding trees mostly cultivated in Kerala ?
(a) Castilla elastic
(b) Parthenium argentattum
(c) Hevea brazeeliensis
(d) Gagulee

Different types of rubber trees are called
(a) Genesis
(b) Clone
(c) Brand
(d) Plantation

The origin land of rubber tree
(a) Kerala
(b) Brazil
(c) Argentina
(d) America

The chemical used to preserve latex
(a) Ammonia
(b) Acetic Acid
(c) Formic acid
(d) Sulphuric acid

________ is the acid usually used to coagulating skim rubber
(a) Formic acid
(b) Sulphuric acid
(c) Acetic acid
(d) Hydrochloric acid

The best grade of creep rubber is
(a) EBC
(b) PLC
(c) Sheet
(d) Crumb

Example of a natural fibre is
(a) Coir
(b) Polyester
(c) Nylon
(d) Aramid

Jute is made from ___________ part of the tree
(a) Seeds
(b) Leaf
(c) Flower
(d) Stem