📚 Year 10 AQA Engineering: Experimental and Practical Assessment Key Points | AQA 工程：实验与实践考核要点
In Year 10 AQA Engineering, practical and experimental assessments are designed to evaluate your ability to apply theoretical knowledge in real workshop and laboratory contexts. You will be expected to demonstrate safe working practices, accurate measurement, appropriate material selection, competent use of tools and machines, and systematic testing. This article breaks down the essential points you need to master for your practical assessments, from initial hazard identification to final evaluation and reporting.
在 AQA 工程课程（10 年级）中，实践与实验考核旨在评估你将理论知识应用到真实车间和实验室情境中的能力。你需要展示安全操作规范、精确测量、合理的材料选择、熟练使用工具与机器，以及系统化的测试方法。本文梳理了实践考核中必须掌握的核心要点，从最初的危险识别到最终的评估与报告。
1. Health and Safety First | 健康与安全第一
Always wear the correct Personal Protective Equipment (PPE) for the task, such as safety glasses, heat-resistant gloves, aprons, and steel-toe boots. Check that all PPE is in good condition before use.
始终根据任务要求穿戴正确的个人防护装备，例如安全眼镜、防热手套、工作围裙和钢头鞋。使用前须检查所有 PPE 是否完好。
Carry out a written risk assessment before any practical activity, identifying hazards like sharp edges, rotating machinery, hot surfaces, and electrical risks. Note the control measures required to minimise each risk.
在任何实践活动前要完成书面风险评估，识别锋利边缘、旋转机械、高温表面和电气风险等危险源，并注明降低每项风险所需的控制措施。
Understand and follow the Control of Substances Hazardous to Health (COSHH) regulations when using adhesives, solvents, lubricants, or dust-producing materials. Ensure adequate ventilation and use extraction systems where required.
使用粘合剂、溶剂、润滑剂或易产生粉尘的材料时，应理解并遵守《有害健康物质控制》（COSHH）法规。确保通风良好，并在必要时使用排风系统。
Know the location of emergency stops, fire extinguishers, and first aid kits. Never operate machinery without supervision and a clear understanding of the emergency shutdown procedure.
熟悉紧急停机按钮、灭火器和急救箱的位置。未经监督且未清楚掌握紧急关闭程序，切勿操作机械设备。
2. Understanding the Design Brief and Specifications | 理解设计概要及规范
Read the design brief carefully, identifying the client's needs, functional requirements, and constraints such as budget, size, weight, and available materials. Highlight the key performance criteria your product must meet.
仔细阅读设计概要，明确客户需求、功能要求以及预算、尺寸、重量和可用材料等约束条件。突出产品必须满足的关键性能标准。
Translate the brief into a clear product specification, including measurable targets like 'must support a load of 5 kg' or 'must operate at 6 V DC'. Use this specification to guide your design and testing stages.
将设计概要转化为清晰的产品规格，包含可量化的目标，如“必须支撑 5 kg 负载”或“必须在 6 V 直流下运行”。以此规格指导设计与测试阶段。
Produce initial concept sketches with annotations that explain how your design meets the specification. Ensure your sketches show correct proportions, assembly details, and materials.
绘制带有注释的初步概念草图，解释设计如何满足规格。确保草图显示正确的比例、装配细节和材料。
3. Material Selection and Property Testing | 材料选择与性能测试
Identify suitable materials for each component based on mechanical properties such as tensile strength, hardness, toughness, elasticity, and density. Reference material data sheets or perform simple comparative tests.
根据抗拉强度、硬度、韧性、弹性和密度等力学性能为每个部件选择合适的材料。查阅材料数据表或进行简单的对比测试。
Perform practical tests to compare material properties: for example, a tensile test using a spring balance and weights to observe extension before fracture, or a scratch test to compare hardness.
通过实际操作测试比较材料性能：例如使用弹簧秤和砝码进行拉伸试验，观察断裂前的延伸量；或通过划痕测试比较硬度。
Record results in a structured table, noting observations such as bending, cracking, or surface changes. Use these results to justify your final material choices in your design portfolio.
用结构化的表格记录结果，注明弯曲、开裂或表面变化等观察现象。用这些结果在设计作品集中为最终选材提供依据。
Consider additional properties like thermal conductivity, electrical conductivity, and corrosion resistance when the product operates in specific environments. Test conductivity using a simple circuit with an ammeter.
当产品在特定环境中运行时，还应考虑热导率、电导率和耐腐蚀性等附加属性。可使用带电流表的简单电路测试导电性。
4. Using Hand Tools and Machinery Competently | 熟练使用手工工具与机器
Select the correct hand tool for each operation: for instance, a hacksaw for cutting metal, a tenon saw for wood, or files of appropriate coarseness for shaping. Keep cutting edges sharp and tools clean.
为每道工序选择合适的工具：例如用钢锯切割金属，用夹背锯切割木材，或用合适粗细的锉刀进行修形。保持刃口锋利、工具清洁。
When using pillar drills, lathes, or milling machines, set the correct speed for the material and secure the workpiece firmly using a vice or clamps. Never adjust settings while the machine is running.
使用台钻、车床或铣床时，要根据材料设定正确转速，并用台钳或夹具牢固固定工件。绝不可在机器运转时调整设置。
Apply cutting fluids or lubricants where appropriate to reduce heat and improve finish. After machining, deburr all edges with a file to remove sharp burrs and ensure safe handling.
在适当情况下使用切削液或润滑剂，以降低热量并改善表面光洁度。加工后用锉刀去除所有边缘的毛刺，确保安全拿取。
5. Accurate Measuring and Marking Out | 精确测量与划线
Use a steel rule, try square, and scriber for basic marking out on metal. For higher precision, employ vernier callipers and micrometres to measure external and internal dimensions to 0.1 mm or better.
使用钢尺、直角尺和划线针在金属上完成基本的划线。要达到更高精度，须使用游标卡尺和千分尺测量内外尺寸，精度可达 0.1 mm 或更高。
Always mark from a datum edge or reference face to reduce cumulative errors. Apply marking blue or engineer's layout fluid to make scribed lines clearly visible.
始终从基准边或参考面开始标记，以减少累积误差。涂上划线蓝油或划线液，使刻划线清晰可见。
Double-check all measurements before cutting or drilling. Use centre punches to create a small indentation at hole positions, guiding the drill bit and preventing wander.
在切割或钻孔前反复核对所有尺寸。用中心冲在孔位上冲出小凹点，以引导钻头并防止钻偏。
6. Electronic Circuit Construction and Testing | 电子电路搭建与测试
Read circuit diagrams and identify components such as resistors, capacitors, transistors, diodes, and integrated circuits. Use a breadboard for prototyping before soldering onto stripboard or a custom PCB.
阅读电路图并识别电阻、电容、三极管、二极管和集成电路等元器件。先在面包板上进行原型搭建，再焊接到条形板或定制 PCB 上。
Solder components neatly, ensuring joints are shiny and free of 'dry' joints. Heat the joint sufficiently and apply solder to the pad and component lead, not just the iron tip.
焊接元器件要整洁，确保焊点光亮且无虚焊。充分加热焊点，将焊料加到焊盘和元件引线上，而不仅仅是烙铁头上。
esistance (R). Verify Ohms law: V = I × R. Check continuity to confirm proper connections.
使用数字万用表测量电压（V）、电流（I）和电阻（R）以测试电路。验证欧姆定律：V = I × R。通过通断测试确认连接良好。
When using sensors such as LDRs or thermistors, calibrate the circuit by measuring output voltage at known light levels or temperatures and plotting a calibration curve.
使用光敏电阻（LDR）或热敏电阻等传感器时，需通过测量已知光照强度或温度下的输出电压并进行标定曲线绘制，来完成电路校准。
7. Mechanical Systems Assembly | 机械系统装配
or torque changes using the formula: Ratio = Number of teeth on driven gear ÷ Number of teeth on driver gear.
理解基本机械部件：杠杆、连杆、凸轮、齿轮（直齿轮、锥齿轮、蜗轮蜗杆）、滑轮和皮带。使用公式计算齿轮比以改变速度或扭矩：齿轮比 = 从动轮齿数 ÷ 主动轮齿数。
Assemble mechanisms accurately, ensuring shafts are parallel and bearings are lubricated. Use appropriate fasteners such as nuts and bolts, grub screws, or cotter pins to secure components.
精确装配机构，确保轴平行安装且轴承润滑良好。使用合适的紧固件，如螺母和螺栓、紧定螺丝或开口销来固定部件。
Test the assembled mechanism under low load first, checking for smooth movement and excessive friction. Adjust alignment and lubrication until the mechanism operates reliably.
先在低负载下测试装配好的机构，检查运动是否顺畅、有无过度摩擦。调整对中和润滑，直至机构能可靠运行。
8. CAD Modelling and CAM Production | CAD 建模与 CAM 生产
Use 3D CAD software (e.g., Fusion 360, SolidWorks) to create a detailed digital model of your product, including individual components and an assembly. Ensure all dimensions are correctly constrained.
使用三维 CAD 软件（如 Fusion 360、SolidWorks）创建产品的详细数字模型，包括各个零部件和装配体。确保所有尺寸都正确约束。
Export 2D drawings with dimensions, tolerances, and material specifications. Generate DXF files for laser cutting or STL files for 3D printing, checking file settings for correct scale and unit.
导出带尺寸、公差和材料规格的二维工程图。生成用于激光切割的 DXF 文件或用于 3D 打印的 STL 文件，并检查文件设置以确保比例和单位正确。
When using a laser cutter, select appropriate speed and power settings for the material thickness and type. Always perform a test cut on a small sample to verify settings.
使用激光切割机时，根据材料厚度和类型选择合适的切割速度和功率。务必先用小样件进行试切，验证设置。
For 3D printing, orient the part to minimise overhangs and support material. Check layer height and infill density for strength requirements. Post-process by removing supports and sanding if necessary.
进行三维打印时，应合理摆放零件以减少悬空部分和支撑材料。根据强度需求检查层高和填充密度。后处理时去除支撑，必要时进行打磨。
9. Systematic Testing and Evaluation | 系统化测试与评估
Develop a test plan linked to your product specification. Define test methods, required equipment, and expected results. For example, to test structural strength, apply a known load and measure deflection.
制定与产品规格相关联的测试计划。明确测试方法、所需设备和预期结果。例如，测试结构强度时，施加已知负载并测量挠度。
Use appropriate instruments to collect quantitative data: a force meter for mechanical testing, a tachometer for rotational speed, or a digital oscilloscope for electronic signals. Record readings accurately.
使用合适仪器收集定量数据：力学测试用测力计，转速测量用转速表，电子信号测量用数字示波器。准确记录读数。
Compare your test results against the specification targets. Analyse any discrepancies and explain possible causes, such as manufacturing tolerances, material variations, or assembly errors.
将测试结果与规格目标进行比较。分析任何偏差，并解释可能的原因，如制造公差、材料差异或装配误差。
10. Data Recording, Analysis, and Graphs | 数据记录、分析与图表
Present data in clear tables with headings and units (e.g., Load (N), Extension (mm)). Include repeated readings and calculate mean values to improve reliability. Identify and remove anomalous results.
用清晰的表格呈现数据，带有表头和单位（如 负载（N）、延伸量（mm））。包含重复读数并计算平均值以提高可靠性。识别并剔除异常结果。
Plot graphs with the independent variable on the x-axis and dependent variable on the y-axis. Label axes, add a suitable scale, and draw a line of best fit where appropriate. Use the graph to identify trends or calculate gradients.
绘制图表时将自变量放在 x 轴，因变量放在 y 轴。标注坐标轴、选择合适比例，并在合适处绘制最佳拟合线。利用图表识别趋势或计算斜率。
ulations from data, such as efficiency = (useful output energy ÷ total input energy) × 100%, or mechanical advantage = load ÷ effort. Use your calculations to evaluate performance.
从数据中进行简单计算，如效率 = （有用输出能量 ÷ 总输入能量）× 100%，或机械效益 = 负载 ÷ 动力。用计算结果评价性能。
11. Problem Solving and Iterative Improvement | 问题解决与迭代改进
When a component fails or does not meet the specification, diagnose the root cause rather than simply replacing it. Check for design flaws, material defects, or incorrect assembly.
当部件失效或不满足规格时，应诊断根本原因而不仅仅是更换。检查设计缺陷、材料瑕疵或装配错误。
Propose at least two possible modifications and evaluate their feasibility, cost, and impact on other parts of the system. Select the best improvement and implement it in a controlled way.
至少提出两种可行的修改方案，并评估其可行性、成本和对系统其他部分的影响。选择最佳改进方案并加以控制实施。
Retest the modified product and record the new performance data. Show evidence of iteration in your portfolio by including 'before and after' test results and photographic evidence.
重新测试改进后的产品并记录新的性能数据。在作品集中展示迭代证据，包括“改进前与改进后”的测试结果和照片证据。
12. Documentation and Final Report | 文档与最终报告
Keep a well-organized logbook or diary of all practical activities, including dates, tasks completed, problems encountered, and decisions made. This provides evidence of your practical engagement and reflective practice.
保持条理清晰的日志或记录本，记录所有实践活动，包括日期、完成的任务、遇到的问题和做出的决定。这为你的实践参与和反思性实践提供了证据。
Produce a final report that follows a standard engineering structure: aim, introduction, materials and equipment list, method/ procedure, results, analysis, conclusion, and evaluation. Use subheadings and clear language.
撰写的最终报告应遵循标准工程结构：目标、引言、材料与设备清单、方法/步骤、结果、分析、结论和评估。使用副标题和清晰的语言。
Include photographs, CAD screenshots, and annotated diagrams to illustrate key stages. Refer to your test plan and specification to justify whether the product is fit for purpose. Suggest further improvements for future iterations.
包含照片、CAD 屏幕截图和带注释的图表以说明关键阶段。参照测试计划和规格，论证产品是否满足使用要求。为后续迭代提出进一步改进建议。
Published by TutorHao | Engineering Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
或截图后用「扫一扫 → 相册」选择本图