【正文】 ot in use, kept in heated container by welder awaiting use.9. What information normally appears on radiography?Perameter identification, Location of markers to ensure plete coverage, the name of the inspecting laboratory, the date, the part number, whether original or subsequent exposure.10. What is the code require amperage for the dry, prod method of magic particle inspection?90110 amps/inch for 19mm100 – 125 amps / 19mm11. What materials are the transducer (search unit) (crystal) made from?Quartz, Barium Titanate, Lithium Sulphate and Ceramics.Page 2 of 6112. What is a film defect (artefact)?A mark on the film usually 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 and reinspect.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 mechanical 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 deflection on the cathode ray tube or oscilloscope.The prob make sound wave, though the material, reflect by the wall amp。 defect, and indicate on the sceen.16. Which method . magic particle examination or liquid peration examination, locate nonmetallic inclusions open to the surface.Both.17. What is 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 。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 magic particle or liquid perant 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 機(jī)械綜合 2 1. What is a mil?“Mil”是什么？1/1000 inch, ” or .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.Page 3 of 613. Name 2 tests carried out to determine toughness.., CHARPY impact test.4. What is max. hardness valve as per NACE MR 0175?Low carbon steel 235 Hv max. (21 HRC max) 鋼 最大： 235 Hv5. How would you measure gramophone lines (水線) 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 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, . Number, Client. Test Results etc.9. Why is radiography preferred over other . methods?Permanent indications on SPAM.RT give a record.Questionnaire and Answer Sheet (MAGNETICAL PARTICLE TESTING) 磁粉檢驗(yàn)1. Can heat have an effect on the results of a magic particle test?YES 是的 ( 1, magic change, 2. water or dye dry)2. How does the appearance of a surface defect 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 retested by PT method. Subsurface defects are detectable by MTMethod (most reliable method is “wet fluorescent” after . magizing) keep in mind the skin effect when using AC current3. TRUE or FALSE: A coil shot produces what is generally considered to be a longitudinal magic 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 190?！?100125 Amp (refer to ASME Section V)5. Surface defects are more clearly defined by . or . current.By . 6. TRUE or FALSE: Discontinuities parallel to the magic field produce the strongest indicationsFALSE, best case is 90176?！?deep in weldments is more of a problem than is the case of surface defects.TRUE 正確14. When a magic field is induced in a part with prods, spaced 6 inches apart, the field is considered as: a) solenoid field b) distorted circular field c) longitudinal field d) yoke fieldb) 15. TRUE or FALSE: Abrupt changes in thickness, high amperages and drilled holes near the test surface are causes of nonrelevant indications. TRUE 正確Questionnaire and Answer Sheet RT (RADIOGRAPHY TESTING) 射線檢驗(yàn)1. What is the purpose of a perameter?To indicate the quality of radiological images.The ability of showing the smallest defect.2. What are the minimum and maximum acceptance levels, per ASME Section V, for film density using a gammaray source and single film viewing? for xray, for gammaray3. Name five (05) attributes which are normally included in a written radiographic procedure.Material thickness, isotope or Xray source, minimum source to object distance, maximum source size, film type and manufacturer, required sensitivity, radiographic technique,4. Name at least 5 types of weld defects would