📚 GCSE Eduqas Engineering: Fast-Track Vocabulary & Terminology Guide | GCSE Eduqas 工程：词汇术语速记指南
Mastering technical vocabulary is essential for success in GCSE Eduqas Engineering. This guide breaks down key terms into thematic sections and provides memory hooks, abbreviations, and links to real-world applications. Use it alongside your revision to quickly recall definitions in the exam.
掌握技术词汇是 GCSE Eduqas 工程考试成功的关键。本指南将核心术语按主题分类，提供记忆技巧、缩写以及实际应用示例，帮助你在复习中快速回忆定义。
1. Material Classification | 材料分类
Ferrous metals contain iron and are mostly magnetic. Remember 'Ferrous' from the Latin 'ferrum' (Fe). Typical examples include mild steel and cast iron.
黑色金属含铁，大多有磁性。记忆窍门：Ferrous 源自拉丁语“ferrum”（铁）。典型例子如低碳钢和铸铁。
Non-ferrous metals contain no iron, are non-magnetic, and usually resist corrosion better than ferrous metals. Key examples: aluminium, copper, brass and zinc.
有色金属不含铁、无磁性，通常比黑色金属更耐腐蚀。主要例子：铝、铜、黄铜和锌。
Alloys are mixtures of a metal with other elements to improve properties. Think of 'alloy' as 'ally' – metals working together. Steel is an alloy of iron and carbon; bronze is copper and tin.
合金是金属与其他元素的混合物，旨在改善性能。把“alloy”想成“联盟”——金属组合。钢是铁碳合金，青铜是铜锡合金。
Composites combine two distinct materials to achieve superior characteristics, such as carbon-fibre-reinforced polymer (CFRP) or glass-reinforced plastic (GRP). Mnemonic: 'C for Combined'.
复合材料将两种不同材料结合以获得优越特性，例如碳纤维增强聚合物 (CFRP) 或玻璃增强塑料 (GRP)。助记：“C”代表结合 (Combined)。
Smart materials change their properties in response to an external stimulus. Shape memory alloy (SMA) returns to a preset shape when heated; thermochromic pigment changes colour with temperature.
智能材料在外界刺激下会改变特性。形状记忆合金 (SMA) 受热恢复原形；热致变色颜料随温度改变颜色。
2. Material Properties | 材料性能
Hardness is a material's resistance to indentation or scratching. Test methods include Brinell and Rockwell. Think: 'Hard to scratch'.
硬度是材料抵抗压痕或划痕的能力。测试方法有布氏和洛氏。思考：“硬到难刮”。
Toughness measures the energy a material absorbs before fracturing; it is the opposite of brittleness. A tough material can withstand impact without shattering. Mnemonic: 'Tough takes a hit'.
韧性衡量材料断裂前吸收的能量，与脆性相反。韧性材料能承受冲击而不碎裂。助记：“坚韧抗打”。
Ductility refers to the ability to be drawn into a wire. Think of a 'duct' as a narrow passage – ductile metals can be pulled thin. Copper is highly ductile.
延展性（韧性）指材料能被拉成丝的能力。把“duct”想象成管道——延性金属可拉细。铜的延展性极佳。
Malleability is the ability to be hammered or rolled into thin sheets without cracking. 'Malleable' sounds like 'mallet' – a hammer. Aluminium is very malleable.
可锻性（展性）指材料能被锤打或轧制成薄片而不开裂。“Malleable”音似“mallet”（木槌）。铝的可锻性很好。
Elasticity means the material returns to its original shape after the load is removed. Think of a spring. The elastic limit is the point beyond which permanent deformation occurs.
弹性指材料卸载后恢复原状的性质。想象弹簧。弹性极限是超过后就会发生永久变形的临界点。
Tensile strength is the maximum stress a material withstands while being stretched before breaking. Often quoted as UTS (ultimate tensile strength). Unit: MPa (N/mm²).
抗拉强度是材料被拉伸至断裂前承受的最大应力，常表示为 UTS。单位：兆帕 (N/mm²)。
3. Manufacturing Processes | 制造工艺
Casting involves pouring liquid metal into a mould to solidify. Types include sand casting and die casting. Remember: 'Cast from liquid'.
铸造是将液态金属浇入模具凝固。类型有砂型铸造和压铸。记住：“铸造，从液态开始”。
Forging shapes metal using compressive forces, often when hot. It improves grain structure and strength. Picture a blacksmith's hammer and anvil.
锻造利用压缩力（常趁热）使金属成形，可改善晶粒结构和强度。想象铁匠的锤和砧。
Machining removes material using cutting tools to achieve precise dimensions. Common operations: turning (workpiece rotates), milling (cutter rotates), and drilling. Mnemonic: 'Machine cuts'.
机加工使用刀具切除材料以获得精确尺寸。常见操作：车削（工件旋转）、铣削（刀具旋转）和钻削。助记：“机械切割”。
Forming reshapes material without adding or removing mass, e.g. bending, rolling, pressing. The volume remains constant.
成形工艺在不增减质量的情况下改变形状，如折弯、轧制和冲压。体积守恒。
Additive manufacturing (3D printing) builds objects layer by layer from a digital model. Opposite of subtractive machining. Helps create complex geometries with minimal waste.
增材制造（3D 打印）从数字模型逐层构建物体，与减材加工相反。适合制造复杂形状且浪费少。
4. Joining Methods | 接合方法
Welding fuses two metal parts by melting the base metals, often with a filler rod. Fusion is permanent and strong. Think: 'Weld melts together'.
焊接通过熔化母材（通常加填充棒）使两部分熔合，接头永久且坚固。思考：“焊接，熔合一体”。
below 450 °C. Used extensively in electronics. Surface must be clean; flux helps. Memory: 'Soldering = Soft and low temperature'.
软钎焊使用熔点低于 450 °C 的填充合金（焊料）连接金属，广泛用于电子行业。表面需清洁，助焊剂帮忙。记忆：“软钎焊，软且低温”。
Brazing is similar but the filler metal melts above 450 °C without melting the base metal. Produces stronger joints than soldering, often used for pipework. Mnemonic: 'Brazing is Brassier – tougher'.
硬钎焊类似，但填充金属在 450 °C 以上熔化而不熔化母材。接头比软钎焊更强，常用于管路。助记：“硬钎焊更硬更强”。
Adhesive bonding uses chemical glues such as epoxy or cyanoacrylate. It spreads stress evenly, can join dissimilar materials, but may weaken under heat or moisture.
粘合剂连接使用环氧树脂或氰基丙烯酸酯等化学胶。应力分布均匀，可连接不同材料，但高温或潮湿可能减弱。
Mechanical fasteners – bolts, screws, rivets – create detachable or permanent assemblies. Riveting is permanent; bolted joints can be disassembled for maintenance.
机械紧固件——螺栓、螺钉、铆钉——形成可拆卸或永久的装配。铆接为永久式，螺栓连接便于维护拆装。
5. Engineering Drawings & Tolerances | 工程制图与公差
Orthographic projection shows a 3D object through multiple 2D views – nt, side and plan. First angle (common in UK) places the right view on the left. Mnemonic: 'Ortho = straight views'.
正交投影通过多个二维视图展示三维物体，通常有主视图、侧视图和俯视图。第一角投影（英国常用）中右视图放在左边。助记：“正交，直接视角”。
Isometric drawing is a 3D pictorial sketch where horizontal lines are drawn at 30° to the baseline. It gives a realistic sense of depth without perspective.
等轴测图是三维示意图，水平线相对于基线倾斜 30°，无需透视即可呈现逼真的立体感。
Dimensioning adds measurements to a drawing. Linear dimensions, radii and diameters must follow standards. Never double-dimension; use arrows neatly.
尺寸标注为图纸添加测量数据。线性尺寸、半径和直径须符合标准。切勿重复标注，箭头要整洁。
n a dimension. A shaft of 10.00 ± 0.05 mm means it can range from 9.95 to 10.05 mm. Think: 'How much you can tolerate'.
公差是尺寸允许的变化范围。轴尺寸 10.00 ± 0.05 mm 表示可从 9.95 至 10.05 mm。思考：“你能容忍多少误差”。
Scale represents the ratio of drawing size to real size. A scale of 1:2 means the drawing is half actual size. Always check the scale block on a drawing.
比例表示图样尺寸与实际尺寸之比。1:2 表示图样为实际大小的一半。务必查看图纸上的比例栏。
6. Mechanical Systems & Motion | 机械系统与运动
A lever consists of effort, load and fulcrum. Three classes: Class 1 – fulcrum in middle (e.g. seesaw); Class 2 – load in middle (wheelbarrow); Class 3 – effort in middle (tweezers). Recall: 'FLE 1-2-3' (Fulcrum, Load, Effort).
杠杆由动力、负载和支点组成。三类：第一类支点居中（如跷跷板）；第二类负载居中（手推车）；第三类动力居中（镊子）。记忆：“FLE 一二三”。
Gear ratio is given by number of teeth on driven gear divided by number of teeth on driver gear. A ratio of 3:1 means the driven gear turns once for every three turns of the driver; torque increases.
齿轮比 = 从动轮齿数 ÷ 主动轮齿数。3:1 表示主动轮每转 3 圈从动轮转 1 圈，扭矩增大。
Simple gear types: spur gears (parallel shafts), bevel gears (intersecting shafts), worm and wheel (non-reversible high reduction), rack and pinion (rotary to linear motion).
简单齿轮类型：直齿轮（平行轴）、锥齿轮（相交轴）、蜗轮蜗杆（不可逆大减速比）、齿轮齿条（旋转转直线运动）。
A cam changes rotary motion into reciprocating motion in a follower. Common profiles: pear, eccentric, heart. Used to open engine valves or drive automata.
凸轮将旋转运动转化为从动件的往复运动。常见轮廓：梨形、偏心、心形。用于开启发动机气门或驱动自动机。
Pulleys and belt drives transmit power over a distance. The speed ratio is inversely proportional to pulley diameters. Adding an idler pulley can adjust tension.
带轮和皮带传动远距离传递动力。转速比与带轮直径成反比。增加惰轮可调节张紧力。
Bearings reduce friction between moving parts; common types are plain (sleeve), ball, and roller bearings. They need lubrication to avoid overheating and wear.
轴承减少运动部件间的摩擦；常见类型有滑动轴承、球轴承和滚子轴承。需润滑以防过热和磨损。
7. Electronic & Electrical Fundamentals | 电子与电气基础
Ohm's law defines the relationship: V = I × R age (volts), I is current (amps) and R is resistance (ohms). For power: P = I V. Mnemonic: 'V over I for R'.
欧姆定律定义关系：V = I × R，V 电压（伏特），I 电流（安培），R 电阻（欧姆）。功率：P = I V。助记：“电压除电流得电阻”。
s: 1/Rₜₒₜₐₗ = 1/R₁ + 1/R₂. Current splits but voltage remains the same across each branch.
电阻串联直接相加：Rₜₒₜₐₗ = R₁ + R₂ + …。并联总电阻变小：1/Rₜₒₜₐₗ = 1/R₁ + 1/R₂。电流分流而各支路电压相同。
An LED (Light Emitting Diode) converts electricity into light efficiently. It works only with current flowing in the correct direction; a series resistor protects it from excessive current.
LED（发光二极管）将电高效转化为光。仅当电流按正确方向流过时工作，需串联电阻限流保护。
A thermistor changes resistance with temperature: NTC type's resistance drops as temperature rises. Used in temperature sensors. LDR (Light Dependent Resistor) resistance falls in bright light.
热敏电阻阻值随温度变化：NTC 型阻值随温上升而下降，用于温度传感器。LDR（光敏电阻）光照增强阻值下降。
spikes in a circuit. Time constant τ = R × C indicates how fast it charges or discharges.
电容（符号 C，单位法拉）储存电荷。电容器用于平滑电路中的电压尖峰。时间常数 τ = R × C 表示充放电快慢。
8. Structures & Forces | 结构与力
Types of force: tension (pulling), compression (pushing), shear (sliding across a plane), torsion (twisting) and bending. Use 'TCSTB' as a quick recall mnemonic.
力类型：拉力（拉）、压力（推）、剪切力（平面滑移）、扭力（扭转）和弯力。可用“拉压剪扭弯”速记。
lure. Strain (ε) is the extension divided by original length: ε = ΔL / L₀ (dimensionless).
应力 (σ) 是单位面积的力：σ = F / A，单位帕斯卡 (Pa)。高应力可致失效。应变 (ε) 是伸长量与原长之比：ε = ΔL / L₀，无量纲。
Young' escribes stiffness: E = stress / strain. It is the gradient of the linear part of a stress–strain graph. Steep gradient means stiff material. Units: Pa.
杨氏模量 (E) 描述刚度：E = 应力 / 应变。它是应力–应变曲线线性段的斜率。斜率越大材料越刚硬。单位：Pa。
stance from the pivot. Equilibrium exists when total clockwise moment equals total anticlockwise moment.
力矩是力的转动效果：力矩 = 力 × 力到支点的垂直距离。当顺时针力矩总和等于逆时针力矩总和时，系统平衡。
9. Sustainability & Lifecycle | 可持续性与生命周期
Life Cycle Assessment (LCA) evaluates environmental impact from raw material extraction to manufacturing, use and disposal. It considers energy, emissions and waste.
生命周期评估 (LCA) 从原材料提取到制造、使用和废弃，评估环境影响，考量能源、排放与废弃物。
The 6Rs of sustainability are: Rethink, Refuse, Reduce, Reuse, Repair and Recycle. They form a hierarchy – 'Refuse' is the most powerful, 'Recycle' the last resort.
可持续发展 6R 原则：反思、拒绝、减少、再利用、修复和回收。构成递进层级——“拒绝”最强，“回收”是最终手段。
Embodied energy is the total energy used to produce a material. Aluminium has very high embodied energy; timber generally has low embodied energy. Designers consider this in material choice.
隐含能是生产一种材料所需的总能量。铝的隐含能很高，木材通常较低。设计选材时需斟酌。
Carbon footprint measures the total greenhouse gas emissions caused directly and indirectly by a product or process. Reducing it often means using less fossil fuel and more renewable energy.
碳足迹衡量产品或过程直接和间接造成的温室气体排放总量。减少碳足迹通常意味着减少化石燃料，多用可再生能源。
Planned obsolescence is the practice of designing products with a limited useful life, encouraging consumers to buy replacements. A counter-example is modular design for repair.
计划性报废是故意将产品设计成有限使用寿命，促使消费者更换的做法。反例是模块化设计，便于维修。
10. Quality, Measurement & Standards | 质量、测量与标准
Quality Assurance (QA) focuses on the processes used to make the product. It is preventative – aiming to design quality in. Quality Control (QC) inspects finished products, detecting defects.
质量保证 (QA) 关注制造产品的过程，以预防为主，旨在将质量设计进去。质量控制 (QC) 则检验成品，发现缺陷。
or a dimension. A tight tolerance (±0.01 mm) demands more precise manufacturing. Remember: 'Tolerance is the allowed error window'.
公差定义尺寸可接受的范围。严格公差 (±0.01 mm) 需要更高精度的制造。记住：“公差就是这个允许的误差窗”。
Calibration compares a measuring instrument against a known standard to ensure accuracy. A micrometer should be calibrated with a gauge block periodically.
校准是将量具与已知标准比较以确保准确度。千分尺应定期用量块校准。
British Standard (BS) and ISO (International Organization for Standardization) provide specifications that ensure safety, reliability and interchangeability. Products marked with the BSI Kitemark signify conformity.
英国标准 (BS) 和国际标准化组织 (ISO) 提供
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