Optimum Polymer Technology Multiple Choice Test - Set 19 - ObjectiveBooks

Optimum Polymer Technology Multiple Choice Test - Set 19

Practice Test: Question Set - 19

1. Thermosetting materials

    (A) Are cross-linked molecules
    (B) Soften on application of heat
    (C) Are solvent soluble
    (D) None of these

2. In nylon-6, the number 6 represents the total number of

    (A) Carbon atoms in the ring
    (B) Carbon atoms in the linear polymer chain
    (C) Nitrogen atoms in the ring
    (D) Hydrogen atoms in the ring

3. Polymers are

    (A) Micro-molecules
    (B) Macromolecules
    (C) Sub-micromolecules
    (D) None of these

4. Thermocol is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten

    (A) Saturated polyester
    (B) Polyurethane
    (C) Polystyrene
    (D) Either (b) or (c)

5. __________ polythene is most prone to stress-cracking

    (A) High density
    (B) Low density
    (C) Cross-linked
    (D) Linear low density

6. Which of the following is not a condensation polymer?

    (A) Bakelite
    (B) Melamine polymer
    (C) Poly-methyl-methacrylate (PMMA)
    (D) None of these

7. Styrene which is a monomer for the production of polystyrene, is commercially produced by the
    (A) Catalytic dehydrogenation of ethyl benzene
    (B) Dehydration of ethyl alcohol followed by hydrogenation
    (C) Reacting ethylene oxide with acetaldehyde
    (D) Fermentation of starch

8. Phenol formaldehyde

    (A) Employs addition polymerization
    (B) Employs condensation polymerization
    (C) Is a monomer
    (D) Is an abrasive material

9. Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.

    (A) Nylon
    (B) Polyacrylonitrile
    (C) Polypropylene
    (D) Polyester

10. Rayon is superior to cotton in making gauge for wound treatment, because rayon
    (A) Is a synthetic polymer
    (B) Does not stick to the wound unlike cotton
    (C) Can absorb over 90% of its own weight of water
    (D) Both (b) and (c)

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