ARAMCO考试题知识分享.doc
《ARAMCO考试题知识分享.doc》由会员分享,可在线阅读,更多相关《ARAMCO考试题知识分享.doc(63页珍藏版)》请在咨信网上搜索。
1、ARAMCO考试题精品文档Questionnaire and Answer Sheet: MECHANICAL GENERAL 1 机械综合 1 1. What is the purpose of a penetrameter or IQI?Indicates radiographic sensitivity and quality of the techniques.To find the smallest defect.2. What is meant by the term sensitivity with regard to radiography?The ability of a r
2、adiographic technique to reveal defects of a specific size.3. What are the limitations of magnetic particle inspection and liquid penetrant inspection?M.T. can be used only on ferromagnetic materials to detect surface subsurface discontinuities.L.T. can be used to detect defects open to the surface.
3、Both M.P. and L.P. require surface preparations before testing.1) magnetic material2) surface and sub surface3) Surface finish(scale oil )4. What information is contained in a Welding Procedure Specification?Process type, groove (joint) design, material type, material thickness, position of groove,
4、filler metal type, pre-heat requirements, interpass temperature, post weld heat treatment requirements, shielding gas or flux type, electrical characteristics, techniques of welding. Essential and non-essential variables.5. Why is post weld heat treatment required for some type weldments?Relieve str
5、esses, adjust hardness 6. What is the basic difference between a DIN and an ASME penetrameter?DIN penetrameter has a wire type penetrameter, 7 wiresASME penetrameter is a wire type penetrameter. 6 wires7. What type of defects would you expect to find during visual inspection of a completed weld?Unde
6、rcut, excessive or insufficient weld reinforcement, lack of penetration, lack of fusion, porosity, slag inclusion, cracks, weld spatter, etc. incomplete penetration on a single butt-weld, weld spatter, etc.8. What precaution must be taken with low hydrogen welding electrodes?Store in oven when not i
7、n use, kept in heated container by welder awaiting use.9. What information normally appears on radiography?Penetrameter identification, Location of markers to ensure complete coverage, the name of the inspecting laboratory, the date, the part number, whether original or subsequent exposure.10. What
8、is the code require amperage for the dry, prod method of magnetic particle inspection?90-110 amps/inch for 19mm11. What materials are the transducer (search unit) (crystal) made from?Quartz, Barium Titanate, Lithium Sulphate and Ceramics.12. What is a film defect (artefact)?A mark on the film usuall
9、y caused by improper handling or processing.Artefact, water mark, finger print, any bad operation.13. If you were inspecting an item using the prod method and located a weak crack pattern, where would you place the prods to obtain a stronger location?Relocate prods 90 degrees to the crack pattern an
10、d re-inspect.14. What typical defects would you expect while inspecting a casting?Sand and slag inclusions, gas porosity, shrinkage, hot tears.15. Describe the pulse echo technique.When an electric current is applied to the crystal, the crystal vibrates transforming the electric energy into mechanic
11、al vibrations which are transmitted through a coupling medium into the test material as high frequency sound waves. These pulse vibrations propagate through the object and are reflected as echoes from both discontinuities and the back surface of the test piece and will appear as a vertical deflectio
12、n on the cathode ray tube or oscilloscope.The prob make sound wave, though the material, reflect by the wall & defect, and indicate on the sceen.16. Which method i.e. magnetic particle examination or liquid penetration examination, locate non-metallic inclusions open to the surface.Both.17. What is
13、a “Procedure Qualification Record?Listed are the “essential variable” of the specific process of processes. It is a record lf the parameters of the test weld.It supports the range of values on the WPS.18. What is meant by the term “Film Density”?Measurement of film blackening.测量或胶片的发黑度。Densitometer
14、is used to measure film darkening. 显像密度计是用于测量胶片的暗色变化。19. What factors determine the echo height of a flaw in ultrasonic inspection?Size of the flaw, its type, position or orientation and instrument characteristics.20. What surface preparation is required on a material before magnetic particle or liq
15、uid penetrant inspection?The material surface should be clean, dry and free from oil, grease, weld spatter or anything that will obscure or interfere with defect detection. Clean 1” from each side.Questionnaire and Answer Sheet: MECHANICAL GENERAL 2 机械综合 2 1. What is a mil?“Mil”是什么?1/1000 inch, 0.00
16、1” or 0.0254mm.2. Difference between stress relieving and normalising.1) Stress relieving was not to refining the grain structure, but normalising dose.2) Stress relieve dose not alter mechanical property of material, but normalising dose.3. Name 2 tests carried out to determine toughness.D.W.T.T.,
17、CHARPY impact test.4. What is max. hardness valve as per NACE MR 0175?Low carbon steel 235 Hv max. (21 HRC max) 钢 最大:235 Hv5. How would you measure gramophone lines (水线) on a raised face of a flange?Depth guage.6. Name 3 types of flanges face.Plain face, Raised Face, RTJ.7. What precautions must be
18、taken when welding cladded pipe?Check angle, Prep etc. when welding ensures slag is removed and freed of beads etc.8. What info is required on a standard mill cert?Cast number, Chemical Analysis, Mechanical property test result, P.O. Number, Client. Test Results etc.9. Why is radiography preferred o
19、ver other N.D.T. methods?Permanent indications on SPAM.RT give a record.Questionnaire and Answer Sheet (MAGNETICAL PARTICLE TESTING) 磁粉检验1. Can heat have an effect on the results of a magnetic particle test?YES是的 ( 1, magnetic change, 2. water or dye dry)2. How does the appearance of a surface defec
20、t differ from that of a subsurface defect?Surface defects have a more clear and distinct indication and are easier to detect, they can also be re-tested by PT method. Subsurface defects are detectable by MT-Method (most reliable method is “wet fluorescent” after A.C. magnetizing) keep in mind the sk
21、in effect when using AC current3. TRUE or FALSE: A coil shot produces what is generally considered to be a longitudinal magnetic field.TRUE (apply the right hand rule)4. As per ASME Section V, what amperage should be used for the dry prod exam of base metal?For thickness below ” 90-110 Amp/25mm for
22、thickness above ” 100-125 Amp (refer to ASME Section V)5. Surface defects are more clearly defined by A.C. or D.C. current.By A.C. 6. TRUE or FALSE: Discontinuities parallel to the magnetic field produce the strongest indicationsFALSE, best case is 90 to the magnetic field lines.7. TRUE or FALSE: It
23、 is possible to detect defects by magnetic particle examination that cannot be detected by radiography.TRUE, for example, by x-ray method using an Iridium 192 source, you will not detect very smallCracks, called “hair cracks”. Those kinds of defects can be found by MT-wet fluorescent method, on the
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ARAMCO 考试题 知识 分享
1、咨信平台为文档C2C交易模式,即用户上传的文档直接被用户下载,收益归上传人(含作者)所有;本站仅是提供信息存储空间和展示预览,仅对用户上传内容的表现方式做保护处理,对上载内容不做任何修改或编辑。所展示的作品文档包括内容和图片全部来源于网络用户和作者上传投稿,我们不确定上传用户享有完全著作权,根据《信息网络传播权保护条例》,如果侵犯了您的版权、权益或隐私,请联系我们,核实后会尽快下架及时删除,并可随时和客服了解处理情况,尊重保护知识产权我们共同努力。
2、文档的总页数、文档格式和文档大小以系统显示为准(内容中显示的页数不一定正确),网站客服只以系统显示的页数、文件格式、文档大小作为仲裁依据,平台无法对文档的真实性、完整性、权威性、准确性、专业性及其观点立场做任何保证或承诺,下载前须认真查看,确认无误后再购买,务必慎重购买;若有违法违纪将进行移交司法处理,若涉侵权平台将进行基本处罚并下架。
3、本站所有内容均由用户上传,付费前请自行鉴别,如您付费,意味着您已接受本站规则且自行承担风险,本站不进行额外附加服务,虚拟产品一经售出概不退款(未进行购买下载可退充值款),文档一经付费(服务费)、不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
4、如你看到网页展示的文档有www.zixin.com.cn水印,是因预览和防盗链等技术需要对页面进行转换压缩成图而已,我们并不对上传的文档进行任何编辑或修改,文档下载后都不会有水印标识(原文档上传前个别存留的除外),下载后原文更清晰;试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓;PPT和DOC文档可被视为“模板”,允许上传人保留章节、目录结构的情况下删减部份的内容;PDF文档不管是原文档转换或图片扫描而得,本站不作要求视为允许,下载前自行私信或留言给上传者【精***】。
5、本文档所展示的图片、画像、字体、音乐的版权可能需版权方额外授权,请谨慎使用;网站提供的党政主题相关内容(国旗、国徽、党徽--等)目的在于配合国家政策宣传,仅限个人学习分享使用,禁止用于任何广告和商用目的。
6、文档遇到问题,请及时私信或留言给本站上传会员【精***】,需本站解决可联系【 微信客服】、【 QQ客服】,若有其他问题请点击或扫码反馈【 服务填表】;文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“【 版权申诉】”(推荐),意见反馈和侵权处理邮箱:1219186828@qq.com;也可以拔打客服电话:4008-655-100;投诉/维权电话:4009-655-100。