📚 Year 13 CCEA Engineering Vocabulary Quick Memory Guide | Year 13 CCEA 工程学词汇术语速记指南
Engineering at Year 13 level demands not only mathematical competence but also a firm command of precise technical vocabulary. This guide offers quick memory aids for core terms across mechanics, materials, thermodynamics, electronics, manufacturing and systems – all aligned with the CCEA specification. Use these paired explanations and mnemonics to embed definitions faster and recall them confidently in exam scripts.
Year 13 工程学不仅需要扎实的数学能力，也要求对精确的技术词汇有牢固的掌握。本指南为力学、材料、热力学、电子学、制造与系统等核心术语提供快速记忆技巧，完全匹配 CCEA 考试大纲。配合这些中英双语解释和记忆术，你可以更快速地内化定义，并在考卷中自信地提取它们。
1. Stress and Strain Analysis | 应力与应变分析
Stress (σ) – Internal resistance per unit area. Think of stress as the material’s ‘push-back’, σ = F/A. Memory: S-T-R-E-S-S starts like ‘Stretch’, reminding you it arises from applied force.
应力 (σ) – 单位面积上的内力。将应力想象成材料的“反抗力”，σ = F/A。记忆法：应力（Stress）像拉伸（Stretch），都从 STR 开始，源于外力。
Strain (ε) – Extension per original length, ε = ΔL/L₀. It is dimensionless. Memory: ‘Strain’ sounds like ‘stretched ratio’, purely about change in length.
应变 (ε) – 单位原长的伸长量，ε = ΔL/L₀，无量纲。记忆：Strain 联想到“拉伸比率”，只关注形状变化。
Young’s Modulus (E) – Stiffness measure, E = σ/ε within the elastic limit. Memory: ‘Young’s’ links to ‘yielding’ under load, but only up to the limit. Hooke’s Law: F = kx.
杨氏模量 (E) – 刚度衡量，弹性范围内 E = σ/ε。记忆：杨氏（Young）联系到“屈服”，但仅限弹性范围。胡克定律 F = kx 变形。
Yield Stress (σy) – Stress at which plastic deformation begins. Memory: ‘Yield’ means the material ‘gives way’; imagine a knight yielding in a battle – permanent change occurs.
屈服应力 (σy) – 开始塑性变形的应力。记忆：屈服意味着材料“让步”；想象骑士在战斗中屈服就发生不可逆改变。
Factor of Safety (FoS) – Ratio of ultimate stress to allowable stress. Memory: ‘Safety’ factor literally keeps the design ‘safe’ by staying well below failure.
安全系数 (FoS) – 极限应力与许用应力之比。记忆：安全系数真正让设计保持“安全”，远低于失效点。
2. Material Properties and Selection | 材料属性与选择
Density (ρ) – Mass per unit volume. Memory: ρ looks like a rounded weight; heavy materials have high ρ.
密度 (ρ) – 单位体积的质量。记忆：符号 ρ 像圆润的重物；重材料 ρ 值高。
Hardness – Resistance to indentation or scratching. Memory: ‘Hard’ like a hard hat resists dents; tested by Brinell, Vickers or Rockwell.
硬度 – 抵抗压入或刮擦的能力。记忆：像安全帽抵抗凹痕；通过布氏、维氏或洛氏测试。
Toughness – Ability to absorb energy before fracture. Memory: ‘Tough’ fighters take many hits without breaking – area under stress-strain curve.
韧性 – 断裂前吸收能量的能力。记忆：“坚韧”的拳手承受多次击打不断裂，即应力-应变曲线下面积。
Ductility – Ability to be drawn into a wire. Memory: ‘Duct’ like a duct-tape that stretches; leads to large plastic strain before failure.
延展性 – 被拉成丝的能力。记忆：Duct 像可拉伸的胶带；失效前产生大塑性应变。
Brittleness – Opposite of ductility; sudden failure with little plastic deformation. Memory: ‘Brittle’ like a biscuit snapping – minimal warning.
脆性 – 延展性的反面；几乎无塑性变形就突然断裂。记忆：像饼干折断，几乎没有预警。
3. Thermodynamics Key Terms | 热力学术语
Enthalpy (H) – Total heat content, H = U + pV. Memory: ‘H’ for ‘Heat in the system’ including flow work. Often used in open systems.
焓 (H) – 总热含量，H = U + pV。记忆：H 代表系统的“热能”，包含流动功，常用于开口系统。
Entropy (S) – Measure of disorder. Memory: ‘S’ for ‘spread’ – energy spreads out; entropy always increases in an isolated system.
熵 (S) – 无序度的度量。记忆：S 代表“分散”，能量总是分散；孤立系统中熵恒增。
Adiabatic Process – No heat transfer into or out of the system. Memory: ‘A-dia-batic’ sounds like ‘no-diabatic-heat’, with ‘a-‘ meaning ‘not’.
绝热过程 – 系统与外界无热量交换。记忆：adiabatic 前缀 a- 表“无”，近似“无热量通过”。
Isothermal Process – Constant temperature. Memory: ‘Iso-‘ means same, ‘thermal’ means temperature; like an isotherm on a weather map.
等温过程 – 恒温过程。记忆：iso 相同，thermal 热力；像天气图上的等温线。
Specific Heat Capacity (c) – Energy to raise 1 kg by 1 K. Memory: ‘c’ stands for ‘calorie-like’ – the energy needed to warm substances.
比热容 (c) – 1 kg 物质升高 1 K 所需能量。记忆：c 可联想到卡路里，物质升温所需热量。
4. Fluid Mechanics and Hydraulics | 流体力学与液压
Viscosity – A fluid’s resistance to flow. Memory: ‘Vis-cous’ – think of honey being ‘thick and sticky’; high viscosity means slow flow.
粘度 – 流体流动的阻力。记忆：viscous 像“黏稠”，蜂蜜又厚又粘；粘度高则流动慢。
Reynolds Number (Re) – Predicts flow regime: Re = ρvd/μ. Memory: Reynold’s name helps remember ‘regime’: low Re is laminar, high Re turbulent.
雷诺数 (Re) – 预测流态的数值：Re = ρvd/μ。记忆：雷诺名字帮助记忆流态：低 Re 层流，高 Re 湍流。
Pascal’s Principle – Pressure applied to an enclosed fluid is transmitted equally. Memory: ‘Pascal’ pushes equally – hydraulic brakes and jacks rely on it.
帕斯卡原理 – 对密闭流体施加的压强会等大传递。记忆：“帕斯卡”均等推送；液压制动和千斤顶依赖这一原理。
Bernoulli’s Principle – Faster fluid speed means lower pressure. Memory: ‘Bernoulli – speed up, pressure down’; think of aeroplane wings.
伯努利原理 – 流速越大压强越小。记忆：“伯努利 – 速度升，压强降”；想象飞机机翼。
Continuity Equation – A₁v₁ = A₂v₂ for incompressible flow. Memory: Area times velocity stays constant; if pipe narrows, flow speeds up.
连续性方程 – 不可压缩流动中 A₁v₁ = A₂v₂。记忆：截面积乘流速恒定；管道变窄则流速加快。
5. Electrical and Electronic Principles | 电工电子原理
Ohm’s Law – V = IR. Memory: ‘V for victory’ over resistance; voltage pushes current through resistance – simple triangle.
欧姆定律 – V = IR。记忆：V 代表电压克服电阻推动电流；可用三角形记忆。
Kirchhoff’s Current Law (KCL) – Sum of currents entering a node equals zero. Memory: ‘Current’ junction conserves flow: what goes in must come out.
基尔霍夫电流定律 (KCL) – 流入节点的电流代数和为零。记忆：节点处电流守恒，流入必流出。
Kirchhoff’s Voltage Law (KVL) – Sum of voltages around a loop equals zero. Memory: ‘Loop’ law: total voltage rises equal drops; like a hilly walk back to start.
基尔霍夫电压定律 (KVL) – 回路电压降代数和为零。记忆：回路定律：总升压等于总降压，像走山路回原点。
Resistance and Resistivity – R = ρL/A. Memory: Resistivity (ρ) is a material property; R depends on geometry – longer thinner wire, bigger R.
电阻与电阻率 – R = ρL/A。记忆：电阻率 ρ 是材料性质；R 与几何形状相关，线越长越细 R 越大。
Capacitance (C) – Charge stored per volt, C = Q/V. Memory: ‘C’ for ‘container’ of charge; unit Farad, named after Faraday.
电容 (C) – 单位电压储存的电荷量，C = Q/V。记忆：C 像电荷“容器”；单位法拉，纪念法拉第。
6. Manufacturing Processes and CNC | 制造工艺与数控加工
CNC (Computer Numerical Control) – Automated control of machining tools via programmed commands. Memory: ‘C’ for ‘computer-driven’ and ‘N’ for ‘numbers’ – G-code directs moves.
CNC 计算机数控 – 通过编程指令自动控制加工工具。记忆：C 代表计算机驱动，N 代表数字，G 代码指挥动作。
G-code – Programming language for CNC machines. Memory: ‘G’ stands for ‘geometric’ commands; each line tells position and speed.
G 代码 – 数控机床的编程语言。记忆：G 代表几何命令；每一行告知位置和速度。
CAD (Computer-Aided Design) – Using software to create 3D models. Memory: ‘CAD’ draws the design; typical outputs are solid models and drawings.
CAD 计算机辅助设计 – 用软件创建三维模型。记忆：CAD 绘制设计；典型输出是实体模型和图纸。
CAM (Computer-Aided Manufacturing) – Software that generates toolpaths from CAD data. Memory: ‘CAM’ turns design into machine instructions – ‘Aided Manufacturing’.
CAM 计算机辅助制造 – 根据 CAD 数据生成刀路。记忆：CAM 将设计转化为机器指令——“辅助制造”。
Additive vs Subtractive Manufacturing – Additive builds up (3D printing); subtractive removes material (milling). Memory: ‘Add’ layers, ‘Sub’ cuts away.
增材与减材制造 – 增材逐层堆积（3D 打印）；减材移除材料（铣削）。记忆：Add 增加，Sub 削减。
7. CAD, CAM and Integrated Systems | CAD、CAM 与集成系统
IGES / STEP – Neutral file formats for CAD data exchange. Memory: ‘I-GES’ as ‘I pass geometry’; STEP as ‘standard for exchange’.
IGES / STEP – CAD 数据交换的中性文件格式。记忆：IGES 像“我传递几何”，STEP 是“交换标准”。
CIM (Computer Integrated Manufacturing) – Full integration of design, planning and production. Memory: ‘CIM’ connects all: from CAD to conveyor belts.
CIM 计算机集成制造 – 设计、计划与生产的全面集成。记忆：CIM 连接一切，从 CAD 到传送带。
PLM (Product Lifecycle Management) – Managing product data from concept to disposal. Memory: ‘PLM’ tracks ‘life’ – from cradle to grave.
PLM 产品生命周期管理 – 从概念到报废管理产品数据。记忆：PLM 跟踪“生命”，从摇篮到坟墓。
FMS (Flexible Manufacturing System) – Adaptable production line capable of switching between parts. Memory: ‘Flexible’ means quick changeover; robots reprogram often.
FMS 柔性制造系统 – 能快速切换生产不同零件的产线。记忆：“柔性”意味着快速换型；机器人频繁重编程。
JIT (Just-In-Time) – Inventory strategy: materials arrive exactly when needed. Memory: ‘Just in time’ prevents waste, like a perfectly timed delivery.
JIT 准时生产 – 库存策略：物料恰需时到达。记忆：“刚好及时”避免浪费，像完美定时的快递。
8. Control Systems and Automation | 控制系统与自动化
Open-loop Control – Output has no influence on input; no feedback. Memory: ‘Open’ means no return path; like a toaster that runs on timer only.
开环控制 – 输出不影响输入，无反馈。记忆：“开”即没有返回路径；像只靠定时器的烤面包机。
Closed-loop Control – Feedback adjusts input to reduce error. Memory: ‘Closed’ creates a loop; thermostat measures temperature and switches heater.
闭环控制 – 反馈调整输入以减小误差。记忆：“闭”形成回路；恒温器测得温度并控制加热。
Error Signal – Difference between set-point and actual output. Memory: ‘Error’ tells how far off target; controller aims to minimise it.
误差信号 – 设定值与实际输出的差值。记忆：“误差”表明偏离目标多远；控制器力求最小化误差。
PID Controller – Proportional, Integral, Derivative strategy for precise control. Memory: P handles present, I past accumulation, D future trend.
PID 控制器 – 比例、积分、微分控制策略。记忆：P 处理当前，I 累加过去，D 预测未来趋势。
Actuator – Device that converts control signal into motion. Memory: ‘Actuator’ acts; motor or cylinder that moves a robot arm.
执行器 – 将控制信号转化为运动的装置。记忆：执行器动作；使机械臂运动的电机或气缸。
9. Quality, Measurement and Standards | 质量、测量与标准
Accuracy vs Precision – Accuracy is closeness to true value; precision is repeatability. Memory: ‘Accurate’ is ‘on target’; ‘precise’ clusters closely even if off bullseye.
准确度与精密度 – 准确度是与真值接近度；精密度是重复性。记忆：准确就是“中靶”；精密即使偏离靶心也聚集紧密。
Tolerance – Permissible limit of variation in a dimension. Memory: Engineers ‘tolerate’ a small deviation from nominal; tight tolerance means high cost.
公差 – 尺寸允许的变动范围。记忆：工程师“容忍”微小偏差；紧公差意味着高成本。
ISO Standards – International Organisation for Standardisation ensures consistency. Memory: ‘ISO’ sounds like ‘equal’, promoting global compatibility.
ISO 标准 – 国际标准化组织保障一致性。记忆：ISO 读音像“相等”，促进全球兼容性。
BS Standards – British Standards used in UK engineering. Memory: ‘BS’ reminds ‘British’ benchmark; many CCEA references align with BS.
BS 标准 – 英国工程用标准。记忆：BS 代表“英国”基准；CCEA 诸多内容参照 BS。
Six Sigma – Methodology to reduce defects to 3.4 per million. Memory: ‘Six’ stands for six standard deviations; DMAIC cycle: Define, Measure, Analyse, Improve, Control.
六西格玛 – 将缺陷率降至百万分之 3.4 的方法论。记忆：Six 是六标准差；DMAIC 循环：定义、测量、分析、改进、控制。
Published by TutorHao | Engineering Revision Series | aleveler.com
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