Practice Test: Question Set - 08
1. Synthetic polymer produced by using terephthalic acid and ethylene glycol is
- (A) Terylene
- (B) Nylon-66
- (C) PVC
- (D) Polystyrene
2. Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is
- (A) Ni
- (B) V2O5
- (C) Fe
- (D) Aluminium triethyl combined with titanium tetrachloride
3. Buna-S is also known as
- (A) Teflon
- (B) PTFE
- (C) SBR
- (D) Polycrylates
4. Pick out the wrong statement.
- (A) Denier is defined as weight in gm of 9000 meters length of a fibre,
while tex is defined as weight in gm of 1000 meters length of fibre
- (B) Crimp is a measure of the difference between the length of the
straightened and unstraightened fibre
- (C) Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose
acetate fibres are all prepared by wet spinning
- (D) Nylon fibres have greater water absorption capacity than polyester
fibres
5. Flexible plastic pipes are made of
- (A) High density polyethylene (HDPE)
- (B) Low density polyethylene (LDPE)
- (C) Polypropylene
- (D) Unsaturated polyester
6. Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%)?
- (A) Water impermeable cellophane
- (B) Polythene
- (C) Cellulose acetate
- (D) Teflon
7. 90% of the caprolactam is converted to nylon-6 on its condensation polymerization in the reactor maintained at a temperature of __________ °C.
- (A) -5
- (B) 10-30
- (C) 250-280
- (D) 500-600
8. The physical state in which polymers exist is
- (A) Melts & rubber like state
- (B) Amorphous glassy state
- (C) Partially crystalline state
- (D) All (a), (b) and (c)
9. Ebonite is a/an
- (A) Highly vulcanized rubber
- (B) Natural rubber
- (C) Unvulcanised raw rubber
- (D) Adhesive
10. Alkyd resin is a/an
- (A) Polyamide
- (B) Polyester
- (C) Polyolefin
- (D) Addition polymer
11. Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of
- (A) Cold SBR
- (B) Butyl rubber
- (C) Bunai N
- (D) Buna S
12. Polycaprolactam (Nylon - 6) is produced by the condensation polymerization of caprolactam at 240-280°C in which the conversion of caprolactam is about __________ percent.
- (A) 50
- (B) 75
- (C) 90
- (D) 99
13. Polymerization product of C2F4 (carbon tetrafluoride) is called P.T.F.E. (poly chloro tetra fluoro ethylene). It is also called
- (A) Polyurethane
- (B) Silicone rubber
- (C) Teflon
- (D) Epoxy resin
14. Ion exchange resins are made of
- (A) Lucite
- (B) Sulphonated Bakelite
- (C) Polystyrene
- (D) Teflon
15. Dacron is a/an
- (A) Polyester
- (B) Unsaturated polyester
- (C) Polyamide
- (D) Inorganic polymer
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