Polymer Technology Objective Questions & Answers - ObjectiveBooks

Polymer Technology Objective Questions & Answers

Practice Test: Question Set - 20

1. Nylon-66 compared to nylon-6 has
    (A) Lower melting point
    (B) More abrasion resistant properties
    (C) Higher hardness
    (D) All (a), (b) and (c)

2. Nylon-6 is a
    (A) Polyamide
    (B) Thermosetting resin
    (C) Polyester
    (D) None of these

3. Unbreakable crockeries are made from __________ polymers.
    (A) Polystyrene
    (B) Melamine
    (C) Polystyrene
    (D) Polyurethane

4. Adipic acid is an intermediate in the manufacture of
    (A) Perspex
    (B) Nylon-66
    (C) Polystyrene
    (D) Bakelite

5. In step growth polymerization, generally only one type of reaction & some basic mechanism is involved. Step growth polymerization reaction is not involved in the manufacture of
    (A) Cross linked polystyrene
    (B) Phenol formaldehyde resins
    (C) Polyesters
    (D) Polyamides

6. Styrene butadiene rubber is commercially manufactured by
    (A) Bulk polymerization
    (B) Suspension polymerization
    (C) Solution polymerization
    (D) Emulsion polymerization

7. Which of the following rubbers has the widest service temperature range (-75 to 275°C)?
    (A) Butyl rubber
    (B) Silicon rubber
    (C) Nitrile rubber
    (D) Silicone rubber

8. Pick out the wrong statement.
    (A) Polymers made of only one monomer is called homopolymer
    (B) Polymers made of more than one monomer is called copolymer or mixed polymer
    (C) Vulcanized rubber is more elastic than natural rubber
    (D) The intermolecular forces in thermoplastic polymers are intermediate to that of elastomers & fibres

9. __________ is normally used for the manufacture of refrigerator components and transistor parts.
    (A) Polypropylene
    (B) Polystyrene
    (C) Polyester
    (D) Polyurethane

10. __________ is not a condensation polymer.
    (A) Teflon
    (B) Nylon-66
    (C) Dacron
    (D) Polystyrene

11. Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but
    (A) Polyacrylonitrile
    (B) Polyamide
    (C) Saturated polyester
    (D) Alkyd resin

12. Softening point of high density polythene is about __________ °C.
    (A) 85
    (B) 135
    (C) 165
    (D) 205

13. Styrene butadiene rubber (SBR) is never used for making
    (A) Coated fabrics
    (B) Front wheel tyres of aeroplanes (i.e., heavy duty tyres)
    (C) Gaskets
    (D) Soles of shoes

14. Which of the following is not an elastomer?
    (A) Polyisoprene
    (B) Neoprene
    (C) Nitrile-butadiene
    (D) None of these

15. The process involved in converting rubber into a thin sheet or coating it on fabric is called
    (A) Extrusion
    (B) Mastication
    (C) Calendaring
    (D) Vulcanization

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