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1) Which of the following is not a thermoplastic material ? a. Epoxy polymer b. PVC c. Polystyrene d. Polythene
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2) Addition polymerisation is not involved in the manufacture of_______________? a. Low density polythene b. Poly vinyl chloride c. Polystyrene d. Polyhexamethylene adipamide
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3) Amino resins are used in paper treatment to improve its__________________? a. Wet tear and bursting strength b. Folding endurance c. Wet rub resistance d. All A., B. & C.
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4) Addition of stabiliser during PVC manufacture is done to________________? a. Improve its impact strength b. Improve its elasticity c. Reduce the melt viscosity & glass transition temperature d. Prevent its thermal degradation
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5) ______________are produced by reacting polybasic acid (e.g. Phthalic anhydride) with polyhydric alcohol (e.g., glycerol) ? a. Unsaturated polyester b. Alkyd resins c. Saturated polyester d. Amino resins
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6) Maximum consumption of polymers is in___________________? a. Electrical insulation b. Toys making c. Coating and films d. Packaging
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7) A copolymer is formed by the combination of two or more monomer molecules_________________? a. In a chain without the elimination of water b. With the elimination of small amount of water c. Of the same monomer by elimination of small molecules of water d. None of these
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8) Phosphates (e.g., tricresyl, tributyl, tetrabutyl, triphenyl etc.) are added to polymers to act as __________________? a. Hardeners b. Anti-shrinkage agents c. Plasticisers d. Transparency improver
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9) The rate controlling step in the manufacture of silicone rubber is the_________________? a. Polymer termination step b. Condensation of siloxane to silicone c. Initial hydrolysis of silicone monomer d. None of these
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10) Viscosity of a polymer solution or melt _________________? a. Decreases with increase in molecular weight b. Decreases with increase in temperature c. Increases with increase in temperature d. Does not vary with temperature rise
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11) Vulcanisation of rubber decreases its__________________? a. Tensile strength b. Resistance to organic solvents c. Tackiness d. Working temperature range
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12) Which of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ? a. Phosphorous b. Carbon black c. Pine oil d. Rosin
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13) Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are__________________? a. 5°C and 1 kgf/cm2 b. – 20°C and 1 kgf/cm2 c. 0°C and 1 kgf/cm2 d. 0°C and 3 kgf/cm2
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14) Orion is_________________? a. A copolymer b. A condensation polymer c. Obtained by polymerising vinyl cyanide d. All A., B. and C.
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15) 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
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16) Thermosetting polymers as compared to thermoplastic polymers_____________________? a. Are formed by addition polymerisation b. Have three dimensional structure c. Have linear structure d. None of these
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17) 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
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18) _____________ is not a polyester fiber? a. Terylene b. Dacron c. Nylon d. Polyacrylonitrile
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19) 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
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20) The monomer of poly vinyl chloride (PVC) is__________________? a. Chloroethane b. Ethylene dichloride c. Ethyl chloride d. Chloroform
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