(完整版)機電專業(yè)英語復(fù)習(xí)題及答案

1、機電專業(yè)英語期末復(fù)習(xí)試題一選擇題1.Ifallpointsinalinkagemoveinparallelplanesthesystemundergoesplanarmotionandthelinkagemaybedescribedasa_.A.planarmotionB.planarlinkageC.jointsD. slide2.Thoughframematerialanddesignshouldhandledamping,_aresometimesbuiltintoframesectionstohandlespecificproblems.A.beamsB.holesC.dampersD

2、. screw3.Themaximum allowabledeflectionofashaft_determinedbycriticalspeed,gear,orbearingrequirements.A.oftenB.mustC.wasD.isusually4.Wewillhaveto_tobetterandbettersolutionsaswegeneratemoreinformation.A.repeatmanytimesB.iteratingC.iterateD.tryways5.Ifaproductconfigurationis_specifiedandthenexamined to

3、determinewhethertheperformancerequirementsaremet.A.finallyB.tentativelyC.temporaryD.havebeen6.Manufacturingcanbedefinedasthe_ofrawmaterialsintousefulproductsthroughtheuseoftheeasiestandlest-expensivemethods.A.transformationB.processingC.processD.transforming7.Theplanerandkneetypesofmillingmachineis_

4、becauseofitsflexibility.A.usedmostcommonlyB.mostpopularC.themostcommonlyusedD.mostpowerful8.Asaresult,thesystemwillvibrateatthefrequencyofthe_forceregardlessoftheinitialconditionsornaturalfrequencyofthesystem.A.actionB.excitationC.outD.act9.Beforetwocomponentsareassembledtogether,therelationshipbetw

5、eenthedimensionsofthematingsurfaces_.A.mustbegivingoutB.shouldprintedclearlyC.mustbespecifiedD.shouldbeclearlynoted10.Themainpracticaladvantageoflowerpairsistheirbetterabilitytotraplubricantbetweentheir_surfaces.A.envelopingB.matingC. outerD.outside11.Theword_itselfusuallyreferstothedeteriorationofm

6、etalsandceramics,whilesimilarphenomenainplasticsgenerallycalled1_.A.recrystallization . corrosionB.recrystallizationdegradationC.degradationcorrosionD.corrosiondegradation12.Mostframes_castiron,weldsteel,composition,orconcrete.A.aremadefromB.aremadeupofC.wasproducedbyD.wasconsistof13.Rotatingshaftsp

7、articularlythosethatrunathighspeeds,mustbedesignedtoavoidoperationat_speeds.A .lowB.overloadC.criticalD.hollow14.Althoughcastironisafairlycheapmaterial,eachcastingrequiresa_A.patternB.modelC.moldD.patent15.Theterm_isusedtodescribejointswithsurfacecontact,as withapinsurroundedby ahole.A.highpairB.low

8、pairC.surface pairD.rotarypair1-5 BCDCB 6-10 ACBCA11-15 DACAB1.Lassie was a big dog. She was very clever. She was always helping someone.Once some bad men took some money from an old man. They tied him up with a rope and left hi m on the floor. They kept Lassie in another room. Lassie tried to open

9、the door of the room. But sh e couldn Theret. was a large window in the room, but it was too high for Lassie to reach. She pull ed a chair over to window and stood on it. She pushed and pulled and pulled at the window and at last got it open. With a great jump, she got out.Lassie came back into the

10、house and found the room where the old man was left. She untied the ro pe round the old mansarms and legs. Then she helped him out of the house and down the road to the nearest house.()1. Lassie was _.A. a babyB. a catC. a dogD. a girl()2. Once some bad men tool some money from _.A. a young manB. a

11、young womanC. an old womanD. an old man()3. Lassie _ the door of the room.A. didn topenB. openedC. shutD. didn tshut()4 ._ untied the old man.A.A girlB. A catC. A womanD. Lassie()5. _ caught the bad men.A. The dogB. LassieC. The policemenD. The girl2.Mr. George works at the school lost and found. He

12、 works very carefully. Every day, when he get2s a lost thing, he takes notes about it. There are pens, books, school uniforms, keys, walkmans and many other things in the lost and found. Most of them are the students Ifyou. lose your things, it s easy for you to go to the lost and found for help. Bu

13、t you must tell Mr. George what it is and its c olor and the day when you can tfind it. I think Mr. George is very helpful, and you will be happy when you find the lost there.()6 .Who works at the school lost and found?A. Mr. BrownB. Mr. KingC. Mr. GeorgeD. Nobody()7 .There are _ things in the lost

14、and found.A. noB. fewC. a fewD. many()8. Most things Mr. George takes care of are the _.A. boys B. girls C. studentsD. teachers ()9 .If you lose your things,you dbetter go to ask _.A. BenB. Mr. GeorgeC. your teacher D. your parents()10.If you lose your things and go to the lost and found for help, y

15、ouneedn ttell Mr.George _.A. What it isB. how much it isC. its colorD. the day when you lost it.3.The students were having their chemistry （化學(xué)）class. Miss Li was telling the children what water was like. After that， she asked her students，"What s water？” No one spoke for a few minutes Miss Li a

16、sked again ，“Why don t you answer my question ？ Didn t I tell you what water is like ？” Just then a boy put up his hand and said，“ Miss Li ，you told us that water has no colour and no smell But where to find such kind of water ？The water in the river behind my house is always black and it has a bad

17、smell ” Most of the children agreed with him “I m sorry， children ” said the teacher，“Our water is getting dirtier and dirtierThats a problem()11.The students were having their _ class A EnglishB Chinese C chemistryD maths()12 Miss Li was telling the children what _ was like A waterB air C earthD we

18、ather()13 A boy said ，”The water in the river behind my house is always _”A whiteB blackC clean D clear()14 Most of the children _ the boyA agreed with B wrote toC heard from D sent for()15 The water in the river has colour and smell because it is getting _A more and moreB less and lessC cleaner and

19、 cleanerD dirtier and dirtier1-5: CDADC6-10: CDCBB11-15: CABAD4.Working 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 a nd types of drawings. Working drawings may be

20、on more than one sheet and may contain written i3nstructions called specifications.Working drawings are blueprints used for manufacturing products. Therefore, the set of dra wings must:(a) completely describe the parts, both visually and dimensionally;(b)show the parts in assembly;(3)identify all th

21、e parts; and (4)specify standard parts. The graphics and text informatio n must be sufficiently complete and accurate to manufacture and assemble the product without err or.Generally, a complete set of Working drawings for an assembly includes:(1) Detail drawings of each nonstandard parts.(2) An ass

22、embly or subassembly drawing showing all the standard and nonstandard parts in a singl e drawing.(3) A bill of materials (BOM).(4) A title block.A detail drawing is a dimensioned, multiview drawing of a single part, describing thepart sshape,size, material, and surface roughness, in sufficient detai

23、l for the part to be manufactured based on the drawing alone. Detail drawings are produced from design sketches or extracted from 3-D com puter models. They adhere strictly to ANSI standards and the standard for the specific company, fo r dimensioning, assigning part numbers, notes, tolerances, etc.

24、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

25、 are drawn on multiple sheets, and a sep arate sheet is used for the assembly view. If the assembly is simple or the parts are small, detail dr awings 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

26、 used, they ar e clearly marked under each detail. Also, when more than one detail is placed on a sheet, the spaci ng between details is carefully planned, including leaving sufficient room for dimensions and note s.1. Based on the message, which of the follow is wrong?A) standard parts needn tdrawn

27、 as detailsB) for simple parts, sometimes needn ttodraw the detail working drawingC) for large assemblies details may drawn on multiple sheetsD) If different scales used in a single sheet, they should clearly marked under each detail2.Working drawings for an assembly MAY NOT includes:?A) BOMB) title

28、 blockC) An assembly or subassembly drawingD) Detail drawings of all parts.3. For detail drawing, Which one of the following statement is not true?A) should not has different scalesB) Detail drawing can produced from design sketches or extracted from 3-D computer models.C) detail drawing is a dimens

29、ioned, multiview drawing of a single partD) should Adhere strictly to ANSI standards4. From the message we can infer ANSI is_?A) a set of lawB) a set of notificationC) an OrganizationD) IEEE government45. The topic of the message is_ ? A) How to design working drawings.B) working dra wing scharacter

30、 and the key influence of how to draw a working drawingC) In the design process, what should be considered?D) What is working drawingBC ACD5.One principle aim of kinematics is to create (design) the desired motions of the subjects mechan ical parts and then mathematically compute the positions, velo

31、cities, and accelerations, which thos e will create on the parts. Since, for most earthbound mechanical systems, the mass remains essent ially constant with time, defining the accelerations as a function of time then also defines the dyna mic forces as a function of time. Stresses, in turn, will be

32、a function of both applied and inertial (m a) 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 chosenand the environmental conditions encountered. This obv

33、iously 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 mecha

34、nical design. Very basic and early dec ision in the design process involving kinematic principles can be crucial to the success of any mec hanical design; a design which has poor kinematics will prove troublesome and perform badly. Any mechanical system can be classified according to the number of d

35、egree of freedom (DOF) wh ich it processes. The system sDOF is equal to the number of independent parameters which are ne eded 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

36、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 comp onents along three axes. In a plane, or two-dimensional space, complex motion becomes a combin ation of simultaneou

37、s rotation about one axis (perpendicular to the plane) and also translation resol ved into components along two axes in the plane1、 Kinematics research focus on the following EXCEPT _.A) accelerationsB) force C) positions,D) velocities2、 From the passage that for the design engineer the first and mo

38、st important is_A) the service life of a machineB) the materials choose C) the degree of freedomD) kinematic principles3、 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

39、 parameters should equal D) It should has any DOF as want4、 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 combination of rotation and translationC) A rigid body free to move in three-dimensional space can be resolved into components along th ree axes5