3.1 Increasing the molecular weight of a polymer will cause: (a) An increase in viscosity. (b) A decrease in viscosity. (c) An increase in MFI. (d) A decrease in MFI. (e) Answers (b) and (c). (f) Answers (a) and (d). 3.2 A parallel plate rheometer measures the melt viscosity of nylon 66 over a period of one hour. The melt viscosity will: (a) Go up. (b) Go down. (c) Stay the same. (d) All of the above depending on the water content (e) Answers (a) or (b) depending on the water content 3.3 Which of the following polymerization reactions will always create some branched polyethylene: (a) Condensation reaction. (b) Free radical reaction. (c) Coordinated catalyst reaction. (d) All of the above. (e) None of the above. 3.4 Doubling the average molecular weight (Mw) of a high molecular weight polymer will always cause: (a) A doubling of the viscosity. (b) A doubling of the Tg. (c) A doubling of the Tm. (d) All of the above. (e) None of the above. 3.5 Which of the following is (are) used for determining the Tg: (a) Differential scanning calorimetry. (b) Parallel plate rheometry. (c) Intrinsic viscosity. (d) Capillary rheometry. (e) Answers (b), (c) and (d). 3.6 The strength of a short glass fibre thermoplastic composite will depend on: (a) The peroxide level. (b) The glass fibre orientation. (c) The heat distortion temperature. (d) The gel coat thickness. (e) None of the above