Q.1
Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness?
Q.2
Styrene butadiene rubber (SBR) is never used for making
Q.3
Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are
Q.4
Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically
Q.5
Contact lenses for eyes are made of perspex, which is nothing but
Q.6
Most commonly used rubber vulcanisation agent is
Q.7
A copolymer is formed by the combination of two or more monomer molecules
Q.8
Orlan fibre which is used as a wool sub stitute is
Q.9
Which of the following is a natural polyamide fibre.
Q.10
__________ is not a polyester fibre.
Q.11
Which of the following polymers belong to the class of formaldehyde resin?
Q.12
Dacron (or terylene) fibres as compared to nylon fibres have
Q.13
Condensation polymerisation of __________ produces bakelite.
Q.14
Polymethyl methacrylate, which is an acrylic resin, is also called
Q.15
Hot drink (e.g, tea) cups are usually made of
Q.16
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C.
Q.17
Zeigler - Natta catalyst (AlR₃ - AlCl₃) is used in the polymerisation of
Q.18
Size range of polymer molecules varies from __________ metre.
Q.19
__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.
Q.20
The starting material used for the manufacture of caprolactum is
Q.21
__________ polythene is most prone to stress-cracking
Q.22
Maximum consumption of polymers is in
Q.23
Vinyl flooring is done using __________ sheets.
Q.24
Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.
Q.25
__________ scrap can be recycled & reutilised.
Q.26
Polycondensation reaction of polymerisation
Q.27
Most of the plastics are safe to be used upto a maximum temperature of __________ °C.
Q.28
Viscosity of a polymer solution or melt
Q.29
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic
Q.30
Addition of stabiliser during PVC manufacture is done to
Q.31
Addition polymerisation is not involved in the manufacture of
Q.32
The organic acid monomer in nylon 66 is
Q.33
Lavatory cisterns are normally made of
Q.34
The only natural thermoplastic resin, which is a product of animal life is
Q.35
Cation exchange resins used in water treatment is made from __________ resin.
Q.36
Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin.
Q.37
Epoxy resins (i.e., epoxide polymers)
Q.38
Condensation polymerisation is not involved in the manufacture of
Q.39
In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of
Q.40
Paper like thin plastic articles can be produced by
Q.41
Pick out the correct statement.
Q.42
Which of the following is not a natural polymer?
Q.43
Vulcanisation of rubber does not increase its
Q.44
__________ is not a condensation polymer.
Q.45
Thermosetting plastic materials
Q.46
Which of the following polymers shows the highest anti-tacking properties?
Q.47
Bakelite (phenol-formaldehyde) resin can not be used as
Q.48
Properties of a polymer is affected by the
Q.49
Which of the following polymers has the tendency of decomposing before melting?
Q.50
Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance.
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