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4 Sep 2001: Design a test to see how long polymers can be held above their maximum service temperature.

5 Sep 2001: Devising simple material tests is an important aspect of appreciating which properties are important in a design, and the challenges in obtaining meaningful, relevant material data.

4 Sep 2001: Devise a test to compare the impact resistance of different polymers like polystyrene foam, PMMA (also known as Perspex) and polyethylene.

4 Sep 2001: Devise a test for comparing the tear resistance of different fabrics.

5 Sep 2001: important and could be assessed by a tensile test to measure elastic deformation before failure. ... supported beam of the test material (un-notched, or notched underneath on the tensile edge) – by.

8 Sep 2001: Economics. Cycle time is limited by heating and cooling of the sheet.

8 Sep 2001: Economics. The use of dedicated lathes for metal turning is rare on an industrial scale, except for prototyping.

8 Sep 2001: As a result, a self-quench is usually sufficient. The equipment is very expensive and not economic for large surfaces, but automation is straightforward and very precise control can be achieved.

8 Sep 2001: Economics. Equipment is generally low cost, except where automation is used. ... Wave soldering is the most economic means of soldering large batches of printed circuit boards.

8 Sep 2001: Economics. The machinery is expensive, and can cost well over £100,000 for HIPing. ... Because there is little competition, can be economic for small batches (1,000+) - although still not cheap!