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单选题 If more than six points are used, the additional points will be surplus and unnecessary and would therefore be
学科：机械类专业英语
时间：2023-11-17 21:28:51
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题目1单选题
A body that is completely free in space has twelve . It can rotate about or have linear movement along each of the three mutually perpendicular axes XX, YY or ZZ, so it has six freedoms of and six freedoms ofA. degrees of freedom; translation; rotationB. degrees of freedom; rotation; translationC. degrees of rotation; rotation; translationD. degrees of translation; rotation; translation
题目2单选题
This can be done by six locations in the case of the body, which is known asA. six-point locating principleB. redundant constraintC. insufficient locationD. incomplete location
题目3单选题
To ensure that the workpiece is produced according to the specified shape, dimensions and tolerances, it is essential that the workpiece should be appropriately on the machine toolA. locatedB. clampedC. located and clampedD. none of them
题目4单选题
A is a production tool that locates, holds and supports the workpiece securely so that each part is machined within the specified limitsA. fixtureB. jig
题目5单选题
are rarely clamped on the machine table because it is necessary to move the jig on the table to align the various bushing in the jig with the machine spindleA. FixturesB. Jigs
题目6单选题
If more than six points are used, the additional points will be surplus and unnecessary and would therefore beA. complete locationB. redundant constraintsC. incomplete locationD. insufficient location
题目7单选题
Select the right translation. Locator; Clamping Device; Guiding and Tool-setting Elements; Fixture Body; Other Components or DeviceA. 定位元件、 夹紧装置、 导向和对刀装置、 夹具体、 连接元件、B. 定位元件、 夹紧装置、 导向和对刀装置、 夹具体、 其他元件及装置、C. 定位元件、 夹紧装置、 导向和对刀装置、 夹具体、 连接元件、 其他元件及装置、D. 夹紧装置、 导向和对刀装置、 夹具体、 连接元件、 其他元件及装置、
题目8判断题
Fixtures are generally used in machining (milling, planing, shaping and turning, etc. ) and other manufacturing operations, such as welding, heat treatment, machining inspection and assembly, etcA. 正确B. 错误
题目9判断题
The process of location induces a locking effect which, through frictional or some other forms of mechanism, provides a stability of location which cannot be changed until and unless external loading is able to overcome the locking effectA. 正确B. 错误
题目10多选题
Select the advantages of jigs and fixturesA. ProductivityB. InterchangeabilityC. Skill reductionD. Cost reduction
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