aramco阿美認(rèn)證檢驗(yàn)員考試題及答案

1、Questionnaire and Answer Sheet: MECHANICAL GENERAL 1機(jī)械綜合 機(jī)械綜合 1 1. What is the purpose of a penetrameter or IQI? Indicates radiographic sensi

2、tivity and quality of the techniques. 2. What is meant by the term sensitivity with regard to radiography? The ability of a radiographic technique to reveal defects of a specific size. 3. What are the limitations of magn

3、etic particle inspection and liquid penetrant inspection? M.P. can be used only on ferromagnetic materials to detect surface subsurface discontinuities. L.P. can be used to detect defects open to the surface. Both M.P. a

4、nd L.P. require surface preparations before testing. 4. What information is contained in a Welding Procedure Specification? Process type, groove (joint) design, material type, material thickness, position of groove, fill

5、er metal type, pre- heat requirements, interpass temperature, post weld heat treatment requirements, shielding gas or flux type, electrical characteristics, techniques of welding. 5. Why is post weld heat treatment req

6、uired for some type weldments? Relieve stresses, lower hardness 6. What is the basic difference between a DIN and an ASME penetrameter? DIN penetrameter is a wire type penetrameter, ASME penetrameter is a hole type pen

7、etrameter. 7. What type of defects would you expect to find during visual inspection of a completed weld? Undercutting, excessive or insufficient weld reinforcement, excessive irregularities, incomplete penetration on

8、a single butt-weld, weld spatter, etc.. 8. What precaution must be taken with low hydrogen welding electrodes? Store in oven when not in use, kept in heated container by welder awaiting use. 9. What information normally

9、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

10、is the rule of thumb used to determine the amperage for the dry, prod method of magnetic particle inspection? 100 – 125 amps / inch. 11. What materials are the transducer made from? Quartz, Barium Titanate, Lithium Sulp

11、hate and Ceramics. 12. What is a film defect? A mark on the film usually caused by improper handling or processing. 13. If you were inspecting an item using the prod method and located a weak crack pattern, where would y

12、ou place the prods to obtain a stronger location? Relocate prods 90 degrees to the crack pattern and re-inspect. 14. What typical defects would you expect while inspecting a casting? Sand and slag inclusions, gas porosi

13、ty, 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 mechanical vibrations which are transmitted

14、 through a coupling medium into the test material. These pulse vibrations propogate through the object and are reflected as echoes from both discontinuities and the back surface of the test piece and will appear as a v

15、ertical deflection on the cathode ray tube or oscilloscope. 16. Which method i.e. magnetic particle examination or liquid penetrant examination, locate non-metallic inclusions open to the surface. Both. 17. What is a “W

16、eld Procedure Qualification Record? A document which contains, essentially the same information as a WPS but includes the results of the tests necessary to qualify the WPS. Also listed are the “essential variable” of th

17、e specific process of processes. 18. What is meant by the term “Film Density”? Measurement or film blackening.測(cè)量或膠片的發(fā)黑度。 Densitometer is used to measure film darkening. 顯像密度計(jì)是用于測(cè)量膠片的暗色變化。 19. What factors determine the e

18、cho height of a flaw in ultrasonic inspection? Size of the flow, position or orientation and instrument characteristics. 20. What surface preparation is required on a material before magnetic particle or liquid penetrant

19、 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.Questionnaire and Answer Sheet: MECHANICAL GENERAL

20、 2機(jī)械綜合 機(jī)械綜合 2 15. TRUE or FALSE: Abrupt changes in thickness, high amperages and drilled holes near the test surface are causes of no relevant indications. TRUE 正確Question

21、naire and Answer Sheet RT (RADIOGRAPHY TESTING) 射線檢驗(yàn) 射線檢驗(yàn)1. What is the purpose of a penetrameter? To indicate the quality of radiological images. 2. What are the minimum and maximum acceptance levels, per ASME Sectio

22、n V, for film density using a gamma-ray source and single film viewing? 1.5 – 4.0 (-15% + 30%) 3. Name five (05) attributes which are normally included in a written radiographic procedure. Material thickness, isotope or

23、 X-ray source, minimum source to object distance, maximum source size, film type, penetrameter image requirements, radiographic technique, 4. Name at least 5 types of weld defects would you expect to find with Radiograp

24、hy. Cracks, porosity, slag inclusion, tungsten inclusion, lack of penetration, lack of fusion, cluster gas pores, offset, burn through isolated inclusion, 5. What American standard specifies the qualification requireme

25、nts for technicians involved in nondestructive testing? ASNT, RP SNT-TC-1A 6. TRUE or FALSE: ASME Section VIII, div. 1 contains radiographic acceptance criteria for rounded indication. True (Appendix 4) 正確（附錄 4 ） 7. In

26、 a double wall technique for single wall viewing, what is the minimum number of exposures required by ASME V? Three exposures taken 120 deg. to each other 8. Source size, specimen thickness, and source to object distanc

27、es are three factors that determine the ______________________________ of a radiograph? Sensitivity 靈敏度 9. What does ASME V say about quality of radiographic film? All radiographs shall be free from mechanical, chemical

28、, or other blemishes to the extent that they do not mask and are not confused with the image of any discontinuity in the area of interest. 10. A radiographic film having wide latitude also has, by definition: a) poor d

29、efinition b) low contrast c) high speed d) none of the above. b low contrast 低的對(duì)比度 11. TRUE or FALSE: To make a proper evaluation when interpreting a radiograph, it is necessary to know the welding process used to mak

30、e the weld. True 正確 12. A dark line of varying width on a radiograph which follows the edge of the fusion zone of a weld cap is indicative of: a) undercutting b) incomplete fusion c) porosity d) shrinkage Incomplete fu

31、sion 不完全融合 13. A radiograph that shows a narrow dark line traveling in irregular directions would generally indicate the presence of: a) a crack b) slag line c) aligned porosity d) lack of fusion a- crack 裂縫 14. TRUE

32、 or FALSE: Radiographic film with large grain size will produce radiographs with better definition than film with small grain size. False 錯(cuò)誤 15. TRUE or FALSE: Deep scratches in lead screens result in corresponding dark

33、 fines on the radiograph. True 正確Questionnaire and Answer Sheet UT (ULTRASONIC TESTING) 超聲檢驗(yàn) 超聲檢驗(yàn)1. What is the first step in a UT examination? 超聲檢驗(yàn)的第一步是什么？ Read the Performance Instruction, to be issued by a qua