Polymer Technology Apprenticeship Test Questions - Set 06 - ObjectiveBooks

Polymer Technology Apprenticeship Test Questions - Set 06

Practice Test: Question Set - 06

1. Poly-methyl-methacrylate (PMMA) is known as
    (A) Bakelite
    (B) Teflon
    (C) Perspex
    (D) Nylon-6

2. Orion is
    (A) A copolymer
    (B) A condensation polymer
    (C) Obtained by polymerising vinyl cyanide
    (D) All (a), (b) and (c)

3. A copolymer of vinyl and vinylidene chloride is called
    (A) Treylene
    (B) Orlon
    (C) Saran
    (D) Dacron

4. Pick out the wrong statement.
    (A) Linear polymers are formed from bifunctional groups only and are normally thermoplastic
    (B) Cross-linked branched chain polymers are either elastometric or thermosetting
    (C) Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point
    (D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

5. SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at
    (A) 1 : 3
    (B) 3 : 1
    (C) 1 : 2
    (D) 2 : 1

6. Alkyd resin e.g., glyptal resin formed by Phthalic anhydride and glycerine is not used
    (A) For surface coating of automobiles & air crafts
    (B) For fibre making
    (C) As plasticiser for PVC & nitrocellulose
    (D) For film forming materials

7. Thermosetting polymers as compared to thermoplastic polymers
    (A) Are formed by addition polymerization
    (B) Have three dimensional structure
    (C) Have linear structure
    (D) None of these

8. Neoprene is rendered non-inflammable, because of
    (A) Its cross-linked structure
    (B) Its linear chain structure
    (C) The presence of chlorine atoms in its monomer
    (D) The absence of chlorine atoms in its monomer

9. __________ is not a polyester fibre.
    (A) Terylene
    (B) Dacron
    (C) Nylon
    (D) Polyacrylonitrile

10. Buna-S is also called
    (A) Polyurethane
    (B) SBR
    (C) Teflon
    (D) Bakelite

11. In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
    (A) Hexamethylene diamine and the ring
    (B) Hexamethylene diamine and the adipic acid
    (C) Adipic acid and the ring
    (D) None of these

12. Which of the following is not a polymer of two monomers?
    (A) Teflon
    (B) Bakelite
    (C) SBR
    (D) None of these

13. The monomer of poly vinyl chloride (PVC) is
    (A) Chloroethane
    (B) Ethylene dichloride
    (C) Ethyl chloride
    (D) Chloroform

14. Thermocol (expanded polystyrene) is not used for
    (A) Low temperature thermal insulation as in refrigerator and air conditioners
    (B) Acoustic control and ceiling for building
    (C) High temperature thermal insulation in furnaces
    (D) Packing of delicate electronic gadgets

15. Addition polymerization takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerization is catalyzed by __________, which decompose to give free radicals.
    (A) Organic peroxides
    (B) Sulphuric acid
    (C) Hydrofluoric acid
    (D) None of these

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