《机械工程专业英语》测试题(18-22)含答案
现代机械工程专业英语
Lesson 1 Engineering Drawings1.assembly drawing 转配图2.balloon 零件序号3.detail drawing 零件图4.view 视图5.full-section view 全剖视图6.Broken-sectional view 局部视图7.Convention 惯例，规范8.Cutting-plane 剖切图9.Sketch drawing 草图10.Interchangeable 可互换的11.Craftsman 工匠，工人12.Tolerance 公差13.Procurement 采购，获得14.Exploded drawing 分解示图15.Pattern maker 模型工，翻铸工16.Machinist 机械师，机工Lesson 2 mechanics1.mechanics 力学2.Acceleration 加速度3.Deformation 变形4.Stress 应力5.Sub discipline 分支学科6.Static 静力学7.Dynamics 动力学8.Mechanics of material材料力学9.Fluid mechanics 流体力学10.Kinematics 运动学11.Continuum mechanics连续介质力学12.static equilibrium 静力平衡13.Newton’s first law14.Susceptibility 敏感性15.Newton’s second law of motion16.Yield strength 屈服强度17.ultimate strength 极限强度18.Failure by bucking 屈曲破坏19.Stiffness 刚度20.Young’s modulus 杨氏模量21.Macroscopic 宏量22.Microscopic 微量putational fluid dynamics (CFD)计算流体力学24.trajectory 轨道25.Astrophysics 天体物理学26.Celestial 天空的27.Robotics 机器人学28.Biomechanics 生物力学29.Rigid body 刚体Lesson 3 Engineering Materials1.polymer 聚合物2.Ceramics 陶瓷3.Stiff 硬的，刚性的4.Fracture 断裂，折断5.Transparent 透明的，显然的6.Lustrous 有光泽的7.Delocalized 不受位置限制的8.Ferrous 铁的，含铁的9.Nonferrous 不含铁的，非铁的10.Tailored 定制的，特制的11.Hardness 硬度12.Tensile strength 抗拉强度13.Toughness 韧性14.Quenching 淬火15.Tempering 回火16.Stainless 不锈的17.Shield 防护，屏蔽，遮挡Lesson4 Mechanical Design1.mechanism 机构，机械2.Thermal 热量，热的3.Switch 开关4.Cam 凸轮5.Valve 阀门6.Beam 梁7.Phenomena 现象8.Screw 螺钉，螺杆9.Fasteners 紧固件10.Spring 弹簧11.Gear 齿轮12.Durability 耐用性13.Femur 股骨14.Quadriceps 四头肌15.Optimization method 最优化方法16.Stiffness 硬度17.Stock 原料，备品18.Noninterference 互不干扰Lesson5 machinery component1.pulley 滑轮，带轮2.Torque 扭矩，转（力）距3.Sheave 滑轮车，槽轮4.Disassembly 拆卸分解5.Stock 棒料，库存6.Woodruff key 半圆键，月牙键7.Axle 轮轴，车轴8.Spline 花键，用花键连接9.Bushing 轴瓦，轴衬10.Involute spline 渐开线花键11.Spindle 主轴，轴12.Groove 沟，槽；刻沟，刻槽13.Residual stress 残余应力14.Coupling 联轴器15.Distortion 变形，绕曲16.Misalignment 未对准（线），非对中17.Referred to as 把。
机械专业英语试题及答案精编WORD版
机械专业英语试题及答案精编W O R D版IBM system office room 【A0816H-A0912AAAHH-GX8Q8-GNTHHJ8】学院院长（系主任）（签字）C. degradation…corrosionD. corrosion… degradation12. Most frames _______ cast iron, weld steel, composition, or concrete.A. are made fromB. are made up ofC. was produced byD. was consist of13. Rotating shafts particularly those that run at high speeds, must be designed toavoid operationat speeds.A . lowB .overload C. critical D. hollow14. Although cast iron is a fairly cheap material, each casting requires a .A. patternB. modelC. moldD. patent15. The term is used to describe joints with surface contact, as with a pin surrounded by a hole.A. high pairB. low pairC. surface pairD. rotary pair二、完型填空（在每个小题四个备选答案中选出一个正确答案，本大题共15小题，每小题1分，总计15分）The term shaft usually refers to a relatively long member of round cross section that rotates and transmits power. One or more members such as gears,sprockets, pulleys, and cams are usually (16) to the shaft by means of pins, keys, splines, snap rings, and other devices. These latter members are among the “associated parts” considered in this text, as are couplings and universaljoint, which serve to (17) the shaft to the source of power or load.考生注意：考试时间 120 分钟试卷总分 100 分共 5 页第 1 页Sometimes members like gears and cams are made (28) with shaft,but more often such members (which also include pulleys,sprockets, etc)are made separately and then(29) shaft. Theportion of the mounted member in contact with the shaft is thehub. Attachment of the hub to the shaft is made in variety ofways. A gear can be gripped (30) between a shoulder on the shaftand a spacer, with torque being transmitted through a key. Thegrooves in the shaft and hub into which the key fits are calledkeyways.16、 A) cement B) attached C) connected D)concrete17、 A) endure B) transmit C) serve D)connect18、 A) support B) meet C) satisfy D) strong19、 A) aims B) idler C) terminal D) tomb20、 A) due to B) weather C) whether D) for21、 A) elasticity B) torsional C) inertia D)acceleration22、 A) subjected B)…connect C) and D) From23、 A) deeply B) strength C) clearly understandD) long time24、 A) identify B) cross C) round D) 订线read as follows.Engineering design is the process of devising a system, component, or process to meet desired needs. It is decision making process(often iterative),in which the basic sciences, mathematics, and engineering sciences are applied to convert resourcesoptimally to meet a sated objectives and criteria, synthesis, analysis,construction ,testing, and evaluation. The engineering design component of a curriculum must include most of the following features : development of student creativity, use of open-ended problem statement and use of modern design theory and methodology, formulation of design problem statement and specification, consideration of alternative solutions, feasibility considerations, production process, concurrent engineering design, and detailed system descriptions. Further, it is essential to include a variety of realistic constraints such as economic factors, safety, reliability, aesthetics, ethics, andsocial impact.31、what’s the main meaning of message (1)?A) Engineering design is a systematic process B) materials engineer’s mainworkC) mechanical engineer’s has good idea D) electrical engineer’ mainduty32、In the author’s opinion, the design process is very complex and should takeninto account many factors, from the message who should NOT join into the design team _______.A) environmentalists,B) sociologistsC) engineersD) Government officials33、From the message, we can know the meaning of words “ABET”(at line third paragraph) is _____.A) a set of accredits standardB) a kind of design methodC) a department of US government which responsible for engineering designD) A set of law34、It can be concluded from the passage that in the exercise and training of student, which character of the following is NOT included in the curriculum ______.A) creativityB) new materialC) ethicsD) economic factors35、The title of the message is ______.A) the roles of engineers in manufacturingB) the importance of mechanical designC) engineering designD) The process of machine designTEXT 2Working drawings are the complete set of standardized drawings specifying the manufacture and assembly of a product based on its design. The complexity of the design determines the number and types of drawings. Working drawings may be on more than one sheet and may contain written instructions called specifications.Working drawings are blueprints used for manufacturing products. Therefore, the set of drawings must:(a) completely describe the parts, both visually and dimensionally;(b)show the parts in assembly;(3)identify all the parts; and (4)specify standard parts. The graphics and text information must be sufficiently complete and accurate to manufacture and assemble the product without error.共 5 页第 2 页(1) Detail drawings of each nonstandard parts.(2) An assembly or subassembly drawing showing all the standard and nonstandard parts in a single drawing.(3) A bill of materials (BOM).(4) A title block.A detail drawing is a dimensioned, multiview drawing of a single part, describing the part’s shape, size, material, and surface roughness, in sufficient detail for the part to be manufactured based on the drawing alone. Detail drawings are produced from design sketches or extracted from 3-D computer models. They adhere strictly to ANSI standards and the standard for the specific company, for dimensioning, assigning part numbers, notes, tolerances, etc.In an assembly, standard parts such as threaded fasteners and bearings are not drawn as details, but are shown in the assembly view. Standard parts are not drawn as details because they are normally purchased, not manufactured, for assembly.For large assemblies or assembled with large parts, details are drawn on multiple sheets, and a separate sheet is used for the assembly view. If the assembly is simple or the parts are small,detail drawings for each part of an assembly can be placed on a singlesheet.TEXT 3One principle aim of kinematics is to create (design) the desired motions of the subjects’ mechanical parts and then mathematically compute the positions, velocities, and accelerations, which those will create on the parts. Since, for most earthbound mechanical systems, the mass remains essentially constant with time, defining the accelerations as a function of time then also defines the dynamic forces as a function of time. Stresses, in turn, will be a function of both applied and inertial (ma) forces. Since engineering design is charged with creating systems which will not fail during their expected service life, the goal is to keep stresses within acceptable limits for the materials chosen and the environmental conditions encountered. This obviously requires that all system forces be defined and kept within desired limits. In machinery, the largest forces encountered are often those due to the dynamics of the machine itself. These dynamic forces are proportional to acceleration, which brings us back to kinematics, the foundation of mechanical design. Very basic and early decision in the design process involving kinematic principles can be crucial to the success of any mechanical design; a design which has poor kinematics will prove troublesome and perform badly.Any mechanical system can be classified according to the number of degree of freedom (DOF) which it processes. The system’s DOF is equal to the number of independent parameters which are needed to uniquely define its position in space at any instant of time.A rigid body free to move within a reference frame will, in the general case, has complex motion, which is a simultaneous combination of rotation and translation. In three-dimensional space, there may be rotation about any axis and also simultaneous translation which can be resolved into components along three axes. In a plane, or two-dimensional space, complex motion becomes a combination of simultaneous rotation about one axis (perpendicular to the plane) and also translation resolved into components along two axes in the plane41、Kinematics research focus on the following EXCEPT ______..A) accelerations B) forceC) positions, D) velocities42、From the passage that for the design engineer the first and most important is____A) the service life of a machine B) the materials chooseC) the degree of freedom D) kinematic principles43、An mechanical system has uniquely defined position in space at any instant of time that ___.A) It should has one DOFB) It should Has two DOFC) the DOF and the number of independent parameters should equalD) It should has any DOF as want44、 which one of the following is NOT TRUE _______?.A) A rigid body free to move in three-dimensional space may rotation about anyaxisB) A rigid body free to move in three-dimensional space is a simultaneouscombination of rotation and translationC) A rigid body free to move in three-dimensional space can be resolved intocomponents along three axesD) A rigid body free to move in three-dimensional space may has complex motion45、The best title for this passage would be _______.A) kinematics B) dynamicsC) kinematics and dynamic D) the important of kinematics共 5 页第3 页1．将下列英语句子译成汉语（共5小题，每小题2分）（1）A perfectly rigid or inextensible link can exist only as a textbook type of model of a real machine member.（2）Foundations should ensure the machine’s stiffness; shock absorption and isolation are secondary considerations.(3)Thus, if a mechanical component such as a spring is subjected to repetitive or cyclical applications of stress levels much lower than the ultimate strength, it will fracture after a large number of repetitions of this stress.（4）Interchangeability means that identical parts must be interchangeable, i.e., able to replace each other, whether during assembly or subsequent maintenance work; without the need for any fitting operations.（5）A gear can be gripped axially between a shoulder on the shaft anda spacer, with torque being transmitted through a key.2、将下段英语翻译成汉语（10分）As we look around us w e see a world full of “things”, machines, devices, tools, things that we have designed, built, and used; things made of wood, metals, ceramics, and plastics. We know from experience that some things are better than others; they last longer, cost less, are quieter, or are ease to use. Ideally , however, every such itemhas been designed according to some set of “functional requirements”（5）当一个装置意外地失效后，通常需要进行研究工作，来找出失效的原因和确定可能的改正措施。
机械工程专业英语试卷A机答案
XXXX/第1学期期终试卷A（考试类型：闭卷）课程机械工程专业英语(参照答案及评分阐明) 班级姓名一、词汇（20分）（每个题目为2分）1：把下列英文单词翻译成中文：(1) threshold参照答案：开端，开始(2) graphics terminal参照答案：图像终端(3) a translate command参照答案：平移指令(4) construction robotics参照答案：建筑（构造）机器人(5) a power-driven device参照答案：力驱动装置2：把下列中文词组翻译成英文：(6) 热加工参照答案：hot working(7) 非正常晶体生长参照答案：abnormal grain growth(8)再结晶参照答案：recrystallization(9) 机械效益参照答案：mechanical advantage(10)力放大器参照答案：a force multiplier二、句型（20分）（每个题目为4分）（翻译旳内容，到达意思一致即算对旳）请将下列英文句子翻译成中文（1）Efficiency and mechanical advantage are used to gauge the performance of mechanical machine .参照答案：效率和机械效益是用来检测机械装置旳工作性能旳。
（2）Methods of extracting , producing and treating metals are being developed all the time to meet engineering requirements .参照答案：为了满足工程需要，提炼、生产和处理金属旳措施一直处在发展进步之中。
(3) The common metallic materials possess the metallic properties of luster , thermal conductivity, and electrical conductivity ；are relatively ductile；and some have good magnetic properties .参照答案：常见旳金属材料拥有旳金属性能如：光泽、导热性和导电性，并且有很好旳延展性，此外，尚有某些金属材料具有好旳磁性。
机械工程专业英语考试必备
Lesson 1 Basic Concepts in Mechanics1、The branch of scientific analysis which deals with motions, time, and forces is called mechanics and is made up of two parts statics and dynamics对运动、时间和作用力作出科学分析的分支称为力学。
它由静力学和动力学两部分组成。
2、Our intuitive concept of force includes such ideas as place of application, direction,and magnitudeand these are called the characteristics of a force.直观概念包括作用点、方向和大小。
这些称为力的要素3、Inertia is the property of mass that causes it to resist any effort to change its motion.惯性是质量所具有的抵抗任何外力改变其本身运动状态的性质.4、A particle is a body whose dimensions are so small that they may be neglected.当一个物体的尺寸特别小，可以忽略不计时，该物体可以被称为质点。
5、Law 1 If all the forces acting on a particle are balanced, the particle will either remain at rest or will continue to move in a straight line at a uniform velocity.第一定律如果作用在一个质点上的所有外力平衡，那么，这个质点保持原来的静止或者匀速直线运动状态不变。
《机械工程专业英语》测试题(18-22)含答案
《机械工程专业英语》测验题(18-22)一、将下列词组译成汉语1.the base circle（基圆）2.the pitch curve（啮合曲线）3.the contact force（接触力）4.the intermittent motion（间歇运动）5.the common normal（公法线）6.the conjugate profiles（共轭齿廓）7.the cycloidal profiles （摆线齿形）8.the involute profiles（渐开线齿形）9.the spur gear（直齿轮）10.the herringbone gears（双螺旋齿轮）11.the face gear（端面齿轮）12.the radial distance（径向距离）13.the addendum circle（齿顶圆）14.The tooth thickness（齿厚）15.the tooth space（齿间隙）16.the cap screws（螺钉）17.the setscrews（固定螺丝钉）18.the engineering graphics（工程力学）19.mechanical design（机械设计）20.the installation techniques（安装技术）21.the bolted joint（螺栓连接）22.the hardened washers（强化垫圈）23.the fatigue resistance（抗疲劳强度）24.the modulus of elasticity（弹性模量）25.the antifriction bearing（减摩轴承）26.the rolling bearing（滚动轴承）27.the rolling contact （滚动接触）28.the sliding contact（滑动触电）29.the corrosion resistance（抗腐蚀性）30.the machining tolerances（加工公差）31.the fatigue loading（疲劳载荷）32.the radial loads（径向负荷）33.the thrust loads逆负荷34.the ball bearing球轴承35.the roller bearing滚子轴承36.the single-row bearings单沟轴承37.the double-row bearing双沟轴承38.the needle bearing滚针轴承39.the bearing life轴承寿命40.The rating life额定寿命41.the axis of rotation旋转轴42.The helix angle螺旋角43.a right-hand helix 右旋44.a left-hand helix左旋45.an involute helicoids螺旋面46.an involute curve渐开线47.the shaft centerlines轴中心线48.worm gear蜗轮49.the hypoid gear准双曲面齿轮50.right angle直角51.worm gearing蜗杆传动52.the lead angle导角53.shaft angle轴线角度54.bending load弯曲载荷55.tension load张力负荷pression load压缩负载57.torsional load扭转负荷58.the bending moment弯矩59.the bending stress弯曲应力60.the shot peening喷丸法61.the actuating force工作力62.the coefficient of friction摩擦系数63.An electromagnetic coil电磁线圈64.the magnetic circuit磁路二、将下列短语译成汉语1.disk or plate translating (two-dimensional or planar)盘形传动凸轮（两维的，即平面的）2.cylindrical (three-dimensional or spatial) cams圆柱形凸轮（三维的，即空间的）机构3. a radial (in-line) translating roller follower一个对心直动滚子从动件4. a constant angular velocity ratio旋转角速度的比例5. a constant torque ratio一个恒转矩比6.Nonlinear angular velocity ratios非线性角速度比率7.the parallel helical gear平行斜齿轮8.the crossed helical gear交叉斜齿轮9.the straight bevel gear直锥齿轮10.the spiral bevel gear弧齿锥齿轮11.the skew bevel gear大角度斜交锥齿轮12.the hexagon head screws六角头螺钉13.the fillister head screws槽头螺钉14.the flat head screws 平头螺钉15.the hexagon socket head screws内六角沉头螺钉。
机械工程专业英语的某些单词和句子翻译
英译汉1.tolerance公差 puter-aided manufacturing计算机辅助制造 3.numerically controlled machines数控机床 4.necking颈缩 5.turning，drilling and boring operation 6.formability and machinability成形与可加工性 7.assembly lines装配线 8.dimensional accuracy尺寸精度 9.cross-sectional area横截面积 10.percentage elongation伸长率 11.structural strength结构强度 12.stress-strain curver应力应变曲淬火和内应力 14.earthmoving and construction equipment线 13.quenching and internal stresses土建设备 15.straightening operation 16.cracking and distortoon断裂和扭曲变形 17.light service at fractional horsepower小马力轻载 18.screw pump螺杆泵 19.steel sheet and rolled-steel shapes钢板和滚压成型钢 20.straightening operation矫正操作 21.sensing devices 传感器 21.digital or pulse motor数字与脉冲马达 22.drilling钻 boring齿轮加工镗 reaming铰 gear-cutting operations齿轮加工汉译英1.切削刀具cutting tools 2.紧固件，如螺母fasteners such as nuts 3.刚和铸铁steels and cast irons 4.马氏体和奥氏体martensite and autenite 5.机械特性mechanical properties puter-aided manufacturing计算机辅助制造 7.数控系统numerically controlled systems 8.大批量生产技术mass production techology 9.控制单元control units 10.靠模附件profiling attachment 11.弹性模量和伸长率elastic modulus and percentage elongation 12.规模经济economy of scale 13.闭环系统close-loop system 14.有色金属non-ferrous 15.液压系统hydraulic system 16.弹性和屈服极限elastic and yield limit 17.龙门刨工作台低碳钢和合金钢low-carbon steel and alloy steel 18.pianner-table 短句：1、low carbon steels do not become hard when subjected to such a heat treatment, because of the sma ll amount of carbon contained.当经历热处理、低碳钢不会变硬、因为含有少量碳。
机电工程专业英语答案
机电工程专业英语答案【篇一：机电工程专业英语】r (rotating member) in an electric motor has rotational inertia,and a torque is required to bring it up to speed when the motoris started. if the motor shaft is rigidly connected to a load witha large rotational inertia, and the motor is started suddenly by closing a switch, the motor may not have sufficient torquecapacity to bring the motor shaft up to speed before thewindings in the motor are burned out by the excessive current demands . a clutch between the motor and the load shafts will restrict the starting torque on the motor to that required to accelerate the rotor and parts of the clutch only.电机的转子（转动元件之一）是有惯性的。
当电机启动时，需要一个力矩使转子提升速度。
如果电机轴与负荷是刚性连接，就会有更大的惯性。
这样启动，电机在还没有足够的力矩使转子提升到一定速度，可能就被过电流烧毁了线圈。
在电机和负荷之间的离合器，会限制启动转矩来保证有足够的力矩只加速转子和离合器。
有些机床，可以非常方便的在电机连续运转时，通过操作离合器来启动或停止机器的。
机械专业英语试题及答案
教研室主任 （签字） 学院院长（系主任） （签字）C. degradation…corrosionD. corrosion… degradation12. Most frames _______ cast iron, weld steel, composition, or concrete.A. are made fromB. are made up ofC. was produced byD. was consist of13. Rotating shafts particularly those that run at high speeds, must be designed to avoidoperationat speeds.A . lowB .overload C. critical D. hollow14. Although cast iron is a fairly cheap material, each casting requires a .A. patternB. modelC. moldD. patent15. The term is used to describe joints with surface contact, as with a pin surrounded by a hole.A. high pairB. low pairC. surface pairD. rotary pair二、完型填空（在每个小题四个备选答案中选出一个正确答案，本大题共15小题，每小题1分，总计15分）The term shaft usually refers to a relatively long member of round cross section that rotates and transmits power. One or more members such as gears, sprockets, pulleys, and cams are usually (16) to the shaft by means of pins, keys, splines, snap rings, and other devi ces. These latter members are among the “associated parts” considered in this text, as are couplings and universal joint, which serve to (17) the shaft to the source of power or load.考生注意：考试时间 120 分钟试卷总分 100 分共 5 页第 1 页Sometimes members like gears and cams are made (28) with shaft, butmore often such members (which also include pulleys, sprockets, etc)aremade separately and then(29) shaft. The portion of the mounted memberin contact with the shaft is the hub. Attachment of the hub to the shaftis made in variety of ways. A gear can be gripped (30) between ashoulder on the shaft and a spacer, with torque being transmittedthrough a key. The grooves in the shaft and hub into which the key fitsare called keyways.16、 A) cement B) attached C) connected D) concrete17、 A) endure B) transmit C) serve D) connect18、 A) support B) meet C) satisfy D) strong19、 A) aims B) idler C) terminal D) tomb20、 A) due to B) weather C) whether D) for21、 A) elasticity B) torsional C) inertia D)acceleration22、 A) subjected B)…connect C) and D) From23、 A) deeply B) strength C) clearly understand D)long time24、 A) identify B) cross C) round D)lateral25、 A) lucrative B) objectionable C) attractable D)terrible订线read as follows.Engineering design is the process of devising a system, component, or process to meet desired needs. It is decision making process(often iterative),in which the basic sciences, mathematics, and engineering sciences are applied to convert resources optimally to meet a sated objectives and criteria, synthesis, analysis, construction ,testing, and evaluation. The engineering design component of a curriculum must include most of the following features : development of student creativity, use of open-ended problem statement and use of modern design theory and methodology, formulation of design problem statement and specification, consideration of alternative solutions, feasibility considerations, production process, concurrent engineering design, and detailed system descriptions. Further, it is essential to include a variety of realistic constraints such as economic factors, safety, reliability, aesthetics, ethics, and social impact.31、what’s the main meaning of message (1)?A) Engineering design is a systematic process B) materials engineer’s main workC) mechanical engineer’s has good idea D) electrical engineer’ main duty32、In the author’s opinion, the design process is very complex and should taken intoaccount many factors, from the message who should NOT join into the design team _______.A) environmentalists,B) sociologistsC) engineersD) Government officials33、From the message, we can know the meaning of words “ABET”(at line third paragraph)is _____.A) a set of accredits standardB) a kind of design methodC) a department of US government which responsible for engineering designD) A set of law34、It can be concluded from the passage that in the exercise and training of student,which character of the following is NOT included in the curriculum ______.A) creativityB) new materialC) ethicsD) economic factors35、The title of the message is ______.A) the roles of engineers in manufacturingB) the importance of mechanical designC) engineering designD) The process of machine designTEXT 2Working drawings are the complete set of standardized drawings specifying the manufactureand assembly of a product based on its design. The complexity of the design determines the number and types of drawings. Working drawings may be on more than one sheet and may contain written instructions called specifications.Working drawings are blueprints used for manufacturing products. Therefore, the set of drawings must:(a) completely describe the parts, both visually and dimensionally;(b)show the parts in assembly;(3)identify all the parts; and (4)specify standard parts. The graphics and text information must be sufficiently complete and accurate to manufacture and assemble the product without error.共 5 页第 2页(1) Detail drawings of each nonstandard parts.(2) An assembly or subassembly drawing showing all the standard and nonstandard parts in a single drawing.(3) A bill of materials (BOM).(4) A title block.A detail drawing is a dimensioned, multiview drawing of a single part, describing the part’s shape, size, material, and surface roughness, in sufficient detail for the part to be manufactured based on the drawing alone. Detail drawings are produced from design sketches or extracted from 3-D computer models. They adhere strictly to ANSI standards and the standard for the specific company, for dimensioning, assigning part numbers, notes, tolerances, etc.In an assembly, standard parts such as threaded fasteners and bearings are not drawn as details, but are shown in the assembly view. Standard parts are not drawn as details because they are normally purchased, not manufactured, for assembly.For large assemblies or assembled with large parts, details are drawn on multiple sheets, and a separate sheet is used for the assembly view. If the assembly is simple or the parts are small, detail drawings for each part of an assembly can be placed on a single sheet.Multiple details on a sheet are usually drawn at the same scale. If different scales are used, they are clearly marked under each detail. Also,when more than one detail is placed on a sheet, the spacing between detailsTEXT 3One principle aim of kinematics is to create (design) the desired motions of the subjects’ mechanical parts and then mathematically compute the positions, velocities, and accelerations, which those will create on the parts. Since, for most earthbound mechanical systems, the mass remains essentially constant with time, defining the accelerations as a function of time then also defines the dynamic forces as a function of time. Stresses, in turn, will be a function of both applied and inertial (ma) forces. Since engineering design is charged with creating systems which will not fail during their expected service life, the goal is to keep stresses within acceptable limits for the materials chosen and the environmental conditions encountered. This obviously requires that all system forces be defined and kept within desired limits. In machinery, the largest forces encountered are often those due to the dynamics of the machine itself. These dynamic forces are proportional to acceleration, which brings us back to kinematics, the foundation of mechanical design. Very basic and early decision in the design process involving kinematic principles can be crucial to the success of any mechanical design; a design which has poor kinematics will prove troublesome and perform badly.Any mechanical system can be classified according to the number of degree of freedom (DOF) which it processes. The system’s DOF is equal to the number of independent parameters which are needed to uniquely define its position in space at any instant of time.A rigid body free to move within a reference frame will, in the general case, has complex motion, which is a simultaneous combination of rotation and translation. In three-dimensional space, there may be rotation about any axis and also simultaneous translation which can be resolved into components along three axes. In a plane, or two-dimensional space, complex motion becomes a combination of simultaneous rotation about one axis (perpendicular to theplane) and also translation resolved into components along two axes in the plane41、Kinematics research focus on the following EXCEPT ______..A) accelerations B) forceC) positions, D) velocities42、From the passage that for the design engineer the first and most important is____A) the service life of a machine B) the materials chooseC) the degree of freedom D) kinematic principles43、An mechanical system has uniquely defined position in space at any instant of time that ___.A) It should has one DOFB) It should Has two DOFC) the DOF and the number of independent parameters should equalD) It should has any DOF as want44、 which one of the following is NOT TRUE _______?.A) A rigid body free to move in three-dimensional space may rotation about any axisB) A rigid body free to move in three-dimensional space is a simultaneous combinationof rotation and translationC) A rigid body free to move in three-dimensional space can be resolved into componentsalong three axesD) A rigid body free to move in three-dimensional space may has complex motion45、The best title for this passage would be _______.A) kinematics B) dynamicsC) kinematics and dynamic D) the important of kinematics共 5 页第3 页1．将下列英语句子译成汉语（共5小题，每小题2分）（1）A perfectly rigid or inextensible link can exist only as a textbook type of model of a real machine member.（2）Foundations should ensure the machine’s stiffness; shock absorption and isolation are secondary considerations.(3)Thus, if a mechanical component such as a spring is subjected to repetitive or cyclical applications of stress levels much lower than the ultimate strength, it will fracture after a large number of repetitions of this stress.（4）Interchangeability means that identical parts must be interchangeable, i.e., able to replace each other, whether during assembly or subsequent maintenance work; without the need for any fitting operations.（5）A gear can be gripped axially between a shoulder on the shaft and a spacer, with torque being transmitted through a key.2、将下段英语翻译成汉语（10分）As we look around us we see a world full of “things”, machines, devices, tools, things that we have designed, built, and used; things made of wood, metals, ceramics, and plastics. We know from experience that some things are better than others; they last longer, cost less, are quieter, or are ease to use. Ideally , however, every such item has been designed according to some set of “functional requirements” as perceived by thedesigners—that is, it hs been designed so as to answer the question,（5）当一个装置意外地失效后，通常需要进行研究工作，来找出失效的原因和确定可能的改正措施。
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《机械工程专业英语》测验题(18-22)将下列词组译成汉语the base circle（基圆）the pitch curve（啮合曲线）the contact force（接触力）the intermittent motion（间歇运动）the common normal（公法线）the conjugate profiles（共轭齿廓）the cycloidal profiles （摆线齿形）the involute profiles（渐开线齿形）the spur gear（直齿轮）the herringbone gears（双螺旋齿轮）the face gear（端面齿轮）the radial distance（径向距离）the addendum circle（齿顶圆）The tooth thickness（齿厚）the tooth space（齿间隙）the cap screws（螺钉）the setscrews（固定螺丝钉）the engineering graphics（工程力学）mechanical design（机械设计）the installation techniques（安装技术）the bolted joint（螺栓连接）the hardened washers（强化垫圈）the fatigue resistance（抗疲劳强度）the modulus of elasticity（弹性模量）the antifriction bearing（减摩轴承）the rolling bearing（滚动轴承）the rolling contact （滚动接触）the sliding contact（滑动触电）the corrosion resistance（抗腐蚀性）the machining tolerances（加工公差）the fatigue loading（疲劳载荷）the radial loads（径向负荷）the thrust loads逆负荷the ball bearing球轴承the roller bearing滚子轴承the single-row bearings单沟轴承the double-row bearing双沟轴承the needle bearing滚针轴承the bearing life轴承寿命The rating life额定寿命the axis of rotation旋转轴The helix angle螺旋角a right-hand helix 右旋a left-hand helix左旋an involute helicoids螺旋面an involute curve渐开线the shaft centerlines轴中心线worm gear蜗轮the hypoid gear准双曲面齿轮right angle直角worm gearing蜗杆传动the lead angle导角shaft angle轴线角度bending load弯曲载荷tension load张力负荷compression load压缩负载torsional load扭转负荷the bending moment弯矩the bending stress弯曲应力the shot peening喷丸法the actuating force工作力the coefficient of friction摩擦系数An electromagnetic coil电磁线圈the magnetic circuit磁路将下列短语译成汉语disk or plate translating (two-dimensional or planar) 盘形传动凸轮（两维的，即平面的）cylindrical (three-dimensional or spatial) cams圆柱形凸轮（三维的，即空间的）机构a radial (in-line) translating roller follower一个对心直动滚子从动件a constant angular velocity ratio旋转角速度的比例a constant torque ratio一个恒转矩比Nonlinear angular velocity ratios非线性角速度比率the parallel helical gear平行斜齿轮the crossed helical gear交叉斜齿轮the straight bevel gear直锥齿轮the spiral bevel gear弧齿锥齿轮the skew bevel gear大角度斜交锥齿轮the hexagon head screws六角头螺钉the fillister head screws槽头螺钉the flat head screws 平头螺钉the hexagon socket head screws内六角沉头螺钉。
the external tensile load外部拉伸载荷the external shear load外部剪切负荷The single-row deep-groove bearing单列深沟轴承The angular-contact bearing角接触轴承the self-aligning bearings自动调心轴承the straight roller bearings直滚子轴承the spherical-roller thrust bearing球形辊止推轴承the tapered roller bearings圆锥滚子轴承the condition of statical equilibrium浅析条件下平衡the positive-contact clutches强制接触离合器the overload-release clutches超载释放保护离合器the overrunning clutches超越离合器the magnetic fluid clutches磁流变离合器将下列单词译成汉语cam凸轮camshaft凸轮轴accuracy精度dependability可靠性pulley滑轮flywheel飞轮crank曲柄sprocket链轮axle心轴spindle主轴clutche离合器brake制动四．翻译下列句子1．Although a cam and follower may be designed for motion, path, or function generation, the majority of applications utilize the cam and follower for function generation.虽然可以把凸轮和它的从动件设计为用于运动变换，路径变换或者函数变换，但大多数用途是利用凸轮和它的从动件做函数变换。
2. In the case of a disk cam with a radial (in-line) translating roller follower the smallest circle that can be drawn tangent to the cam surface and concentric with the camshaft is the base circle. 对于一个对心直动滚子从动件盘形凸轮，可画出的与凸轮表面相切且与轮轴同心的最小圆是基圆译文P40 [1]3. Numerous applications in automatic machinery require intermittent motion. A typical example will call for a rise-dwell-return and perhaps another dwell period of a specified number of degrees each, together with a required follower displacement measured in centimeters or degrees.在自动化机械中的许多应用需要间歇运动。
一个典型的例子将要求一个含有上升一停歇一返回和可能另一个停歇的周期，每阶段经过一个指定的角度，伴随着一个所要求的从动件的位移，这个位移以厘米或度来度量。
译文P40 [2]4．Any two mating tooth profiles that satisfy the fundamental law of gearing are called conjugate profiles.任何满足齿轮传动基本定律的一对相互啮合齿廓称之为共轭齿廓。
5. Although there are many tooth shapes possible in which a mating tooth could be designed tosatisfy the fundamental law, only two are in general use: the cycloidal and involute profiles.虽然可以设计出有很多齿廓来满足传动装置的基本定律，但通常所使用的只有两种：即摆线齿廓和渐开线齿廓。
6. Typical methods of fastening and joining parts include the use of such items as bolts, nuts, cap screws, setscrews, rivets, locking devices and keys.紧固和联结零部件的典型方法包含使用这些零件：螺栓，螺母，有头螺钉、定位螺钉，铆钉，锁紧装置和键。
7. Methods of joining parts are extremely important in the engineering of a quality design, and it is necessary to have a thorough understanding of the performance of fasteners and joints under all conditions of use and design.在质量设计工程中，联结零部件的方法非常重要，因此，彻底了解紧固零件和联结零件在所有使用和设计条件下的性能是非常必要的。
8. When a connection is desired which can be disassembled without destructing the parts assembled and which is strong enough to resist both external tensile load and shear load, or a combination of these, then the simple bolted joint using hardened washers is a good solution.当想要一个可以被拆开又不破坏被联接零件的联接时，而且这个联接又要有足够的强度以承受外拉力和剪力或这两种力的结合，使用淬火垫圈的简单螺栓联结是一个很好的方法。