Polymer Technology Btech Questions and Answers - Set 08 - ObjectiveBooks

Polymer Technology Btech Questions and Answers - Set 08

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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