📚 Year 11 CCEA Engineering: Vocabulary & Terminology Quick Memorisation Guide | CCEA 工程：词汇术语速记指南
Engineering at Year 11 level under the CCEA specification introduces a wide range of technical vocabulary that forms the foundation for further study and practical application. This guide breaks down essential terms into logical categories, pairs each with a concise English explanation followed by a Chinese translation, and provides memorable hooks to speed up learning. By mastering these terms, you will build the confidence to interpret exam questions accurately and describe engineering processes with precision.
CCEA Year 11 工程课程引入了大量技术词汇，这些词汇是进一步学习和实践应用的基础。本指南将核心术语按逻辑分类，为每个词条附上简明的英文解释和中文翻译，并提供助记线索以加快记忆。掌握这些术语后，你将能够准确理解考题，并用精准的语言描述工程过程。
1. Material Properties | 材料性能术语
Key terms that describe how materials behave under different conditions. Engineers select materials based on properties such as strength, ductility, hardness, and toughness.
描述材料在不同条件下行为的核心术语。工程师根据强度、延展性、硬度、韧性等性能选择材料。
Ultimate tensile strength (UTS): The maximum stress a material can withstand when being stretched before breaking.
极限抗拉强度：材料在被拉断前所能承受的最大应力。
Ductility: a material to deform plastically under tensile stress, often measured by elongation. Think 'ductile = can be drawn into wire'.
延展性：材料在拉伸应力下发生塑性变形的能力，通常用伸长率衡量。联想'可拉成丝'。
Malleability: The ability of a material to deform under compressive stress, such as hammering or rolling into thin sheets.
可锻性/展性：材料在压缩应力下（如锤击或轧制）变形的能力，可制成薄板。
Hardness: Resistance to indentation, scratching, or wear. Tests include Brinell and Rockwell.
硬度：抵抗压痕、划痕或磨损的能力。测试方法有布氏和洛氏硬度。
Toughness: The ability to absorb energy and plastically deform without fracturing. Opposite of brittleness.
韧性：吸收能量并发生塑性变形而不断裂的能力。与脆性相反。
Elastic limit: The maximum stress a material can withstand and still return to its original shape.
弹性极限：材料能承受且仍能恢复原状的最大应力。
2. Mechanical Forces & Loads | 力与载荷
Understanding the types of forces acting on structures and components is vital for design. These terms describe the nature of applied loads.
理解作用在结构和部件上的力对设计至关重要。这些术语描述了施加载荷的性质。
Tension: A pulling force that tries to stretch or elongate a member.
张力/拉伸：试图拉伸或延长构件的拉力。
Compression: A pushing force that tries to shorten or crush a member.
压缩力：试图缩短或压碎构件的推力。
Shear: A force that acts parallel to a surface, causing layers to slide past each other. Scissors create shear.
剪切力：平行于表面的力，使各层相互滑动。剪刀产生剪切。
Torsion: A twisting force that causes rotation about the longitudinal axis. A wrench applies torsion to a bolt.
扭转力：导致绕纵轴旋转的扭转力。扳手对螺栓施加扭转。
Bending moment: The internal moment that causes a beam to bend. It is calculated as force x perpendicular distance.
弯矩：导致梁弯曲的内部力矩。计算公式为力 x 垂直距离。
3. Manufacturing Processes | 制造工艺
CCEA Engineering requires familiarity with common shaping and joining methods. These verbs describe the action performed on a material.
CCEA 工程要求熟悉常见的成形和连接方法。这些动词描述了施加在材料上的操作。
Casting: Pouring molten metal into a mould cavity where it solidifies. Sand casting and die casting are examples.
铸造：将熔融金属倒入模具型腔并使其凝固。砂型铸造和压铸是实例。
Forging: Shaping metal using compressive forces, often while hot, to improve grain structure and strength.
锻造：使用压缩力（通常热态）使金属成形，以改善晶粒结构并提高强度。
Extrusion: Forcing material through a die to create long shapes with a constant cross-section, like aluminium window frames.
挤压：迫使材料通过模具，形成具有恒定截面的长条形状，如铝制窗框。
Braze welding (brazing): Joining metals using a filler rod with a melting point above 450°C but below the base metals.
钎焊：使用熔点高于 450°C 但低于母材的填充棒连接金属。
Soldering: Joining metals using a filler with a melting point below 450°C, commonly used in electronics.
软钎焊/焊接：使用熔点低于 450°C 的填充材料连接金属，常用于电子元器件。
4. Electronic Components & Circuits | 电子元件与电路
Electronic systems and symbols appear in the CCEA specification. You need to recall component names, functions, and basic circuit laws.
CCEA 考纲中包含电子系统和符号。你需要记住元件名称、功能和基本电路定律。
Resistor: A component that opposes current flow; measured in ohms (Ω). Fixed and variable types exist.
电阻器：阻碍电流流动的元件；单位为欧姆 (Ω)。有固定和可变两种类型。
Thermistor: A temperature-dependent resistor. NTC thermistors decrease resistance as temperature rises.
热敏电阻：电阻值随温度变化的电阻器。NTC 热敏电阻随温度升高阻值降低。
Light-dependent resistor (LDR): Resistance decreases when light intensity increases.
光敏电阻：光照强度增加时电阻降低。
Diode: Allows current to flow in one direction only. An LED emits light when forward biased.
二极管：只允许电流单向流动。LED 在正向偏置时发光。
Transistor: A semiconductor device used to amplify or switch electronic signals. NPN and PNP are the main bipolar types.
晶体管：用于放大或开关电子信号的半导体器件。NPN 和 PNP 是主要双极型。
Ohm's law: V = I x R (voltage = current x resistance).
欧姆定律：V = I x R（电压 = 电流 x 电阻）。
5. Mechanical Systems & Motion | 机械系统与运动
Terms that describe the transmission of motion and force in mechanisms, including levers, gears, and linkages.
描述机构和装置中运动与力传递的术语，包括杠杆、齿轮和连杆机构。
Lever: A rigid bar pivoted at a fulcrum, used to multiply force. Classes 1, 2, and 3 describe the relative positions of effort, load, and fulcrum.
杠杆：绕支点转动的刚性杆，用于倍增力。一、二、三类杠杆分别描述施力点、负荷和支点的相对位置。
Gear ratio: The ratio of the number of teeth on the driven gear to the number on the driver gear. It determines mechanical advantage and speed change.
齿轮比：从动轮齿数与主动轮齿数之比。它决定机械增益和速度变化。
Velocity ratio (VR): The ratio of the distance moved by the effort to the distance moved by the load in the same time.
速比：在相同时间内，施力点移动距离与负载移动距离之比。
Mechanical advantage (MA): Load / Effort. A measure of how much a mechanism multiplies the input force.
机械增益：负载 / 施力。衡量机构将输入力放大了多少倍。
Efficiency: (Useful work output / Total work input) × 100%. Expressed as a percentage.
效率：（有效输出功 / 总输入功）× 100%。以百分比表示。
6. Structures & Stress Analysis | 结构与应力分析
Basic structural terms help you analyse frameworks, trusses, and beams. These are often tested in the context of civil engineering and product design.
基本结构术语有助于分析框架、桁架和梁。这些常在土木工程和产品设计情境中考查。
Strut: A structural member designed to resist compressive forces.
压杆：设计用于承受压缩力的结构杆件。
Tie: A structural member designed to resist tensile forces.
拉杆：设计用于承受拉伸力的结构杆件。
Truss: A framework of struts and ties, often triangular, used to span distances in bridges and roofs.
桁架：由压杆和拉杆组成的框架（通常呈三角形），用于桥梁和屋顶中跨越距离。
Equilibrium: The state when all forces and moments acting on a body are balanced, resulting in no acceleration.
平衡：作用在物体上的所有力和力矩相互抵消，导致加速度为零的状态。
Strain: The deformation of a material caused by stress; calculated as change in length ÷ original length.
应变：由应力引起的材料变形；计算公式为长度变化量 ÷ 原始长度。
7. Engineering Design & The Design Process | 工程设计流程
The design process is iterative. You must be able to describe each stage and the associated documentation or testing.
设计过程是迭代的。你必须能够描述各个阶段及相关文档或测试。
Brief: A written statement of the problem to be solved, including requirements and constraints provided by the client.
设计概要：对要解决的问题的书面陈述，包括客户提出的要求和约束条件。
Specification: A detailed list of technical and functional requirements the final product must meet. Often includes dimensions, materials, and performance targets.
规格说明：最终产品必须满足的技术和功能要求的详细清单。通常包括尺寸、材料和性能指标。
Prototype: A working model of a product, built to test and refine ideas before full-scale production.
原型：可在全面生产前用于测试和完善设计的可工作模型。
Iterative design: A cyclical process of prototyping, testing, analysing, and refining a product.
迭代设计：原型制作、测试、分析和改进产品的循环过程。
Quality control (QC): The inspection and testing of products to ensure they meet specified standards.
质量控制：对产品进行检验和测试，以确保其符合既定标准。
8. Measurement & Tolerance | 测量与公差
Precision is key in engineering. These terms relate to the tools and concepts used to guarantee accuracy.
精度在工程中至关重要。这些术语与保证准确性的工具和概念有关。
Tolerance: le : The permissible limit of variation in a physical dimension. A shaft may be specified as 10 mm ± 0.1 mm.
公差：物理尺寸允许的变动范围。例如，一根轴可能被规定为 10 mm ± 0.1 mm。
Clearance fit: A fit where the shaft is always smaller than the hole, allowing free movement.
间隙配合：轴始终小于孔的配合，允许自由运动。
Interference fit: A fit where the shaft is larger than the hole, requiring force to assemble. It gives a tight joint.
过盈配合：轴大于孔的配合，需要外力装配，形成紧配合。
Vernier calliper: A precise measuring instrument used to measure internal, external, and depth dimensions, typically to 0.02 mm accuracy.
游标卡尺：一种精密测量工具，用于测量内径、外径和深度，精度通常可达 0.02 mm。
Micrometer: A measuring instrument providing even higher precision, usually to 0.01 mm or 0.001 mm.
千分尺：提供更高精度的测量工具，通常可达 0.01 mm 或 0.001 mm。
9. Health, Safety & Standards | 健康、安全与标准
Every engineer must work safely and be aware of legislation and symbols. Key terms from risk assessment to PPE are assessed.
每位工程师都必须安全工作并了解法规和符号。从风险评估到个人防护装备的关键术语都会考查。
Risk assessment: The process of identifying hazards, evaluating the risks, and implementing control measures. Usually recorded in a table.
风险评估：识别危险源、评估风险并实施控制措施的过程。通常记录在表格中。
Hazard: Anything with the potential to cause harm, such as a sharp edge or a hot surface.
危险源：任何可能造成伤害的事物，如锋利的边缘或灼热的表面。
PPE (Personal Protective Equipment): Equipment worn to minimise exposure to hazards. Examples: safety glasses, steel-toe boots, ear defenders.
个人防护装备：为减少危害暴露而穿戴的设备。例如：安全眼镜、钢头靴、耳罩。
COSHH: Control of Substances Hazardous to Health. UK regulations requiring employers to control substances that can harm health.
有害健康物质控制：英国法规，要求雇主控制可能损害健康的物质。
CE marking (UKCA marking post-Brexit): Indicates that a product meets EU (or UK) safety, health, and environmental requirements.
CE 标志（脱欧后为 UKCA 标志）：表明产品符合欧盟（或英国）安全、健康和环境要求。
10. Energy & Power Sources | 能源与动力源
Renewable and non-renewable energy sources, plus power transmission terms, are essential for systems and environmental engineering.
可再生能源和不可再生能源以及动力传输术语，对系统和环境工程至关重要。
Renewable energy: Energy from sources that are naturally replenished, such as solar, wind, hydro, and biomass.
可再生能源：来自太阳能、风能、水能、生物质能等可自然补充的能源。
Fossil fuel: A non-renewable energy source formed from the remains of ancient organisms, e.g. coal, oil, natural gas.
化石燃料：由古生物残骸形成的不可再生能源，如煤、石油、天然气。
Actuator: A device that converts energy (electric, hydraulic, pneumatic) into mechanical motion. A motor or cylinder is an actuator.
执行器：将能量（电能、液压能、气动能）转换为机械运动的装置。马达或气缸即为执行器。
Pneumatics: The use of compressed air to transmit and control power. Often used in automated assembly lines.
气动技术：利用压缩空气传递和控制动力。常用于自动化装配线。
Hydraulics: The use of pressurised liquid (oil) to generate, control, and transmit power. Provides large forces in compact spaces.
液压技术：利用加压液体（油）产生、控制和传递动力，可在紧凑空间内提供较大的力。
11. Common Acronyms & Quick-Fire Glossaries | 常见缩略词与快速释义
Quick reference table for high-frequency acronyms that appear in CCEA exams.
CCEA 考试中高频缩略词快速参考表。
| Acronym | Full Term / 全称 | Meaning / 含义 |
|---|---|---|
| CAD | Computer-Aided Design / 计算机辅助设计 | Using software to create 2D/3D models / 用软件创建二维/三维模型 |
| CAM | Computer-Aided Manufacturing / 计算机辅助制造 | Using software to control machine tools / 使用软件控制机床 |
| CNC | Computer Numerical Control / 计算机数字控制 | Automation of machine tools via programmed commands / 通过编程指令实现机床自动化 |
| SMD | Surface Mount Device / 表面贴装器件 | Electronic component mounted directly onto PCB surface / 直接焊接于 PCB 表面的电子元件 |
| PCB | Printed Circuit Board / 印制电路板 | Board that holds and connects electronic components / 承载并连接电子元件的基板 |
| FET | Field-Effect Transistor / 场效应晶体管 | Transistor controlled by voltage, high input impedance / 电压控制型晶体管，输入阻抗高 |
12. Memorisation Techniques & Exam Tips | 记忆技巧与考试贴士
Apply these strategies to turn passive revision into active recall. Pair abstract terms with visual, kinetic, or linguistic hooks.
运用这些策略把被动复习转化为主动回忆。将抽象术语与视觉、动觉或语言挂钩。
1. Mnemonic first letters: For the four mechanical forces (Tension, Compression, Shear, Torsion), remember 'Tommy Can Sing Tonight'. Make up your own shocking or funny sentence.
首字母记忆法：对于四种力学载荷（拉力、压力、剪切力、扭转力），可记为'汤米今晚会唱歌'。自己编一句夸张或好笑的句子。
2. Flashcards with dual coding: Write the English term on one side, the Chinese translation + a simple sketch on the other. Sketch a lever with fulcrum, effort, and load.
双编码闪卡：一面写英文术语，另一面写中文翻译+简图。画一个带支点、施力点和负载的杠杆。
3. Chunking by topic: Revise all material property terms together, then test yourself by describing a product (e.g. a bicycle frame) using at least five terms.
按主题分组：将材料性能词汇集中复习，然后自测，选用至少五个术语描述一件产品（如自行车架）。
4. Teach-back method: Explain 'tolerance' or 'Ohm's law' to a classmate or even to an empty chair. Speaking aloud strengthens neural pathways.
复述教学法：向同学甚至一把空椅子解释'公差'或'欧姆定律'。大声讲解能强化神经通路。
5. Past paper keyword list: Scan through recent CCEA past papers and highlight every technical term. Create a mini-glossary of those that are repeated.
真题关键词清单：浏览近年的 CCEA 真题，标出每一个技术术语。为重复出现的高频词创建一个迷你词汇表。
6. Use the terms in context: Write a short design scenario (e.g. 'Design a bracket to hold a shelf'). Identify where tension, compression, shear, and bending appear.
情景中运用：写一个简短的设计情景（如'设计一个搁板支架'），找出其中涉及拉力、压力、剪切和弯曲的地方。
7. Spaced repetition: Review the flashcard set after 1 day, 3 days, 1 week. Apps like Anki can automate this; low-tech versions work too.
间隔重复：分别在 1 天、3 天和 1 周后复习闪卡。Anki 等 App 可自动安排，纸质卡片同样有效。
Published by TutorHao | Engineering Revision Series | aleveler.com
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