Environmental Technology 3930 考试技巧

计算器程序

常见错误

1. 1medium涉及分数: 2Sustainability and future development

   Confusing ecological footprint, the total land and sea area needed to supply resources and absorb waste, with carbon footprint, which measures greenhouse gas emissions from fossil fuel use specifically.

   如何避免: State which one the question names before you answer. Ecological footprint is broader than carbon footprint, which is only one part of it.
2. 2medium涉及分数: 2Hydrogen fuel cell opportunities

   Omitting the key process parameters in a steam reforming answer, such as the 700 to 1000 degrees Celsius temperature range and the 3 to 25 bar pressure range.

   如何避免: Learn the operating figures for each named industrial process on your paper and quote them rather than writing 'high temperature and pressure'.
3. 3high涉及分数: 2Energy building performance

   Giving a final numerical answer in a U-value or heat flow calculation without stating the unit or showing the working that produced it.

   如何避免: Write the formula first, show every multiplication step, and finish with the unit attached to your answer, watts or W/m squared K.
4. 4medium涉及分数: 2Waste management

   Making generic environmental statements instead of naming the specific EU Directive that applies, such as the Landfill Directive or the Waste Framework Directive.

   如何避免: Attach a named piece of legislation to any statutory point you make on waste or emissions policy.
5. 5medium涉及分数: 3Hydrogen fuel cell opportunities

   Confusing the anode and cathode half-reactions in a PEM fuel cell, or writing molecular equations instead of the required ionic half-equations.

   如何避免: Learn both half-reactions as ionic equations and check which electrode is which before you write, oxidation at the anode, reduction at the cathode.
6. 6high涉及分数: 2Energy building performance

   Forgetting to subtract window or door area from the gross wall area before calculating total heat flow through a building's fabric.

   如何避免: Calculate net wall area first, gross area minus openings, and only then multiply by the U-value and temperature difference.
7. 7medium涉及分数: 2Phytoremediation

   Treating phytoextraction and phytoremediation as interchangeable terms, rather than recognising phytoextraction's specific purpose of commercial metal recovery.

   如何避免: State the purpose alongside the term: phytoremediation decontaminates, phytoextraction specifically recovers metal for reuse.
8. 8high涉及分数: 3Quality of written communication

   Writing the QWC questions, 5(b), 7 and 9, as disjointed bullet points rather than structured paragraphs with specialist terminology, which caps the answer in the lower marking bands.

   如何避免: Plan each QWC answer as named paragraphs before you write, and use the correct technical term, biohydrometallurgy, anaerobic digestion, on first mention.