Practice Test: Question Set - 09
1. Bristles of tooth brushes are made of
- (A) Nylon-6
- (B) Nylon-66
- (C) Polystyrene
- (D) PVC
2. Which of the following is not present in bagasse fibre?
- (A) Cellulose
- (B) Lignin
- (C) Pentogens
- (D) None of these
3. Most of the plastics are safe to be used upto a maximum temperature of __________ °C.
- (A) 100
- (B) 150
- (C) 350
- (D) 450
4. Which of the following is generally not used as eord for synthetic rubber tyre casing?
- (A) Dacron
- (B) Nylon
- (C) Cellulose
- (D) None of these
5. Contact lenses for eyes are made of Perspex, which is nothing but
- (A) Poly-methyl-methacrylate
- (B) Polystyrene
- (C) Unsaturated polyester
- (D) Polypropylene
6. Addition of plasticizers to polymers results in partial neutralization of intermolecular forces of attraction between the macro-molecules thereby increasing its
- (A) Tensile strength
- (B) Chemical resistance
- (C) Flexibility
- (D) All (a), (b) & (c)
7. Which of the following is not a polyolefin?
- (A) Polystyrene
- (B) Polypropylene
- (C) Neoprene
- (D) None of these
8. Neoprene is chemically known as
- (A) Polybutadiene
- (B) Styrene butadiene rubber (SBR)
- (C) Polyurethane
- (D) Poly chloroprene
9. Vulcanization of raw rubber makes it
- (A) Soft
- (B) Less elastic
- (C) Plastic
- (D) Tacky
10. Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces
- (A) Epoxy resin
- (B) Polyamide
- (C) Alkyd resin
- (D) Phenolic resin
11. Poly-methyl-methacrylate, which is an acrylic resin, is also called
- (A) Thiokol
- (B) Plexiglass or Lucite
- (C) Dacron
- (D) Teflon
12. Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces
- (A) Nylon-6
- (B) Dacron
- (C) Polyester
- (D) PVC
13. Alkyd resin cannot be used for making
- (A) Plasticiser
- (B) Paint & varnish
- (C) Fibres
- (D) Film forming materials
14. Polyvinyl chloride (PVC) is
- (A) A thermosetting material
- (B) A condensation polymerization product
- (C) Made by employing emulsion polymerization
- (D) None of these
15. Buna-N is also called
- (A) Butyl rubber
- (B) Nitrile rubber
- (C) Neoprene
- (D) Thiokol
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