机电英语答案.docx

1、机电英语答案机电英语答案【篇一：机电专业英语复习题及答案】t一选择题 1. if all points in a linkage move in parallel planes the system undergoes planar motion and the linkage may be described as a _ . a. planar motion b. planar linkagec. joints d. slide 2. though frame material and design should handle damping, _ are sometimes built

2、into frame sections to handle specific problems. a .beamsb. holesc. dampers d. screw 3. the maximum allowable deflection of a shaft _ determined by critical speed, gear, or bearing requirements. a. often b. mustc. was d. is usually 4. we will have to _ to better and better solutions as we generate m

3、ore information. a. repeat many timesb. iteratingc. iterated. try ways 5. if a product configuration is _ specified and then examined to determine whether the performance requirements are met. a. finallyb. tentativelyc. temporary d. have been 6. manufacturing can be defined as the _ of raw materials

4、 into useful products through the use of the easiest and lest-expensive methods. a. transformation b. processingc. process d. transforming 7. the planer and knee types of milling machine is _ because of its flexibility. a. used most commonly b. most popular c. the most commonly used d. most powerful

5、 8. as a result, the system will vibrate at the frequency of the _ force regardless of the initial conditions or natural frequency of the system. a. action b. excitation c. outd. act 9. before two components are assembled together, the relationship between the dimensions of the mating surfaces_. a.

6、must be giving out b. should printed clearly c. must be specifiedd. should be clearly noted 10. the main practical advantage of lower pairs is their better ability to trap lubricant between their _ surfaces. a. envelopingb. mating c. outer d. outside 11. the word_ itself usually refers to the deteri

7、oration of metals and ceramics, while similar phenomena in plastics generally called _. a. recrystallization?. corrosion b. recrystallization?degradation c. degradation?corrosion d. corrosion? degradation 12. most frames _ cast iron, weld steel, composition, or concrete. a. are made from b. are made

8、 up of c. was produced by d. was consist of 13. rotating shafts particularly those that run at high speeds, must be designed to avoid operation at _ speeds. a . lowb .overload c. criticald. hollow14. although cast iron is a fairly cheap material, each casting requires a _ 。 a. pattern b. model c. mo

9、ld d. patent 15. the term _ is used to describe joints with surface contact, as with a pin surrounded by a hole. a. high pairb. low pairc. surface pair d. rotary pair 1-5：bcdcb 6-10：acbca11-15 dacab 二阅读 1.lassie was a big dog. she was very clever. she was always helping someone. once some bad men to

10、ok some money from an old man. they tied him up with a rope and left him on the floor. they kept lassie in another room. lassie tried to open the door of the room. but she couldnt. there was a large window in the room, but it was too high for lassie to reach. she pulled a chair over to window and st

11、ood 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 house and found the room where the old man was left. she untied the rope round the old mans arms and legs. then she helped him out of the house and down the ro

12、ad to the nearest house. ()1. lassie was _. a. a baby b. a cat c. a dog d. a girl ()2. once some bad men tool some money from _. a. a young man b. a young woman c. an old woman d. an old man ()3. lassie _ the door of the room. a. didnt open b. opened c. shut d. didnt shut ()4 ._ untied the old man.

13、a.a girl b. a cat c. a woman d. lassie ()5. _ caught the bad men. a. the dog b. lassie c. the policemen d. the girl 2.mr. george works at the school lost and found. he works very carefully. every day, when he gets a lost thing, he takes notes about it. there are pens, books, school uniforms, keys, w

14、alkmans and many other things in the lost and found. most of them are the students. if you lose your things, its easy for you to go to the lost and found for help. but you must tell mr. george what it is and its color and the day when you cant find it. i think mr. george is very helpful, and you wil

15、l be happy when you find the lost there. ()6 .who works at the school lost and found? a. mr. brown b. mr. king c. mr. george d. nobody ()7 .there are _ things in the lost and found. a. nob. few c. a fewd. many ()8. most things mr. george takes care of are the _. a. boys b. girls c. studentsd. teache

16、rs ()9 .if you lose your things, youd better go to ask _. a. ben b. mr. george c. your teacher d. your parents()10.if you lose your things and go to the lost and found for help, you neednt tell mr. george _. a. what it is b. how much it is c. its color d. the day when you lost it. 3.the students wer

17、e having their chemistry（化学） class. miss li was telling the children what water was like. after that，she asked her students，whats water？”no one spoke for a few minutesmiss li asked again，“why dont you answer my question？didnt i tell you what water is like？” just then a boy put up his hand and said，“

18、miss li， you told us that water has no colour and no smellbut where to find such kind of water？the water in the river behind my house is always black and it has a bad smell” most of the children agreed with him “im sorry，children”said the teacher，“our water is getting dirtier and dirtierthats a prob

19、lem ()11.the students were having their _ class aenglish bchinese cchemistry dmaths ()12miss li was telling the children what _ was like awater bair cearth dweather ()13a boy said，”the water in the river behind my house is always _” awhite bblack cclean dclear ()14most of the children _ the boy aagr

20、eed with bwrote to cheard from dsent for ()15the water in the river has colour and smell because it is getting _ amore and morebless and less ccleaner and cleanerddirtier and dirtier 1-5: cdadc6-10: cdcbb11-15: cabad 4.working drawings are the complete set of standardized drawings specifying the man

21、ufacture 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

22、. 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 th

23、e product without error.generally, a complete set of working drawings for an assembly includes: (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.

24、a detail drawing is a dimensioned, multiview drawing of a single part, describing the parts shape, size, material, and surface roughness, in sufficient detail for the part to be manufactured based onthe drawing alone. detail drawings are produced from design sketches or extracted from 3-d computer m

25、odels. 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, butare shown in the assembly view. standard part

26、s are not drawn as details because they are normallypurchased, 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 drawin

27、gs 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 details is carefully pl

28、anned, including leaving sufficient room for dimensions and notes. 1. based on the message, which of the follow is wrong ? a) standard parts neednt drawn as details b) for simple parts, sometimes neednt to draw the detail working drawing c) for large assemblies details may drawn on multiple sheets d

29、) if different scales used in a single sheet, they should clearly marked under each detail 2.working drawings for an assembly may not includes:? a) bom b) title block c) an assembly or subassembly drawing d) detail drawings of all parts. 3. for detail drawing, which one of the following statement is

30、 not true ? a) should not has different scales b) detail drawing can produced from design sketches or extracted from 3-d computer models. c) detail drawing is a dimensioned, multiview drawing of a single part d) should adhere strictly to ansi standards 4. from the message we can infer ansi is_? a) a

31、 set of law b) a set of notification c) an organization d) ieee government 5. the topic of the message is_ ? a) how to design working drawings. b) working drawings character and the key influence of how to draw a working drawing c) in the design process, what should be considered? d) what is working drawing bc acd 5.one 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 pa