Non-destructive testing (NDT) is a testing and analysis technique used by industry to evaluate the properties of a material, component, structure or system for characteristic differences or welding defects and discontinuities without causing damage to the original part. NDT also is known as non-destructive examination (NDE), nondestructive inspection (NDI) and non-destructive evaluation (NDE). Methods of Non-Destructive Testing Current NDT test methods include: Acoustic Emission Testing (AE) This is a passive NDT technique, which relies on detecting the short bursts of ultrasound emitted by active cracks under a load. Sensors dispersed over the surface the structure detect the AE. It is even possible … Continue reading NDE vs NDT, NDI understanding

51. Which of the following is the best reason why the application of emulsifier by a brush is not recommended? A. The brushing action mixes the emulsifier with the penetrant prematurely and irregularly, making accurate control of the emulsification time impossible B. Brushing does not always completely coat the part, thereby leaving a portion of the part difficult to wash C. Brushing in itself is not harmful, but many types of brush materials combine with the emulsifier agents resulting in penetrant and part contamination. (answer) D. Brushing results in a streaking appearance during inspection 52. Developing powder should always  be: … Continue reading NDT NDE ASNT Questions and answers for PT, LPI level II (6).

31. Which of the following is not a good practice when penetrant testing? A. Applying emulsifier by dipping the part in emulsifier B. Appling developer by spraying the part with developer C. Removal of water-washable penetrant with a water spray D. Applying emulsifier with a brush (answer) 32. Dry developer should be applied : A. So that a heavy coat of developer covers all surfaces B. So that a light dusting covers all surfaces to be inspected (answer) C. With a dry paint brush D. By dipping 33. Which of the following is not a form in which penetrant developer is … Continue reading NDT NDE ASNT Questions and answers for PT, LPI level II (5).

17. In Penetrant testing, brushing of Penetrant to the component is a. Not recommended b. Recommended c. Only criteria is adequate coverage d. B and C of the above (answer) 18. Even without developing, the Penetrant can come out of the discontinuity a. True b. False c. But it is very thin layer to be seen d. A and C of the above (answer) 19. How long must a part be kept wet with Penetrant before the removal process is started? a. It varies depending on the type of Penetrant used, the type of material to be tested, the sensitivity … Continue reading NDT NDE ASNT Questions and answers for PT, LPI level II (4).

9. The height of capillary rise of the liquid or the depth to which penetrant enters, is more in the case of a. Wide and shallow discontinuities b. Narrow and deep discontinuities (answer) c. More information is required d. Determined by contact angle and surface tension 10. A liquid in a capillary tube has a concave surface a. The liquid has high surface tension (answer) b. Low surface tension c. More information is required d. The liquid is a Penetrant 11. Which of the following is true of flash point consideration in liquid Penetrant inspection? a. Flash point affects the … Continue reading NDT NDE ASNT Questions and answers for PT, LPI level II (3).

1. Which of the items listed below is NOT an advantage of the liquid penetrant test method? A. The method can find all types of discontinuities (answer) B. The method is simple in principle and relatively easy to understand. C. The method is essentially simple in application. D. There are few limitations on the size and shape of the article that can be treated by this method. 2. When using post-emulsification penetrants, difficulties incurred during the washing operation can be overcome by: A. Reapplying a coat of emulsifier B. Increasing the water pressure used during the washing operation C. Completely … Continue reading ASNT Questions and answers for PT, LPI level II (1).

1- Which of the following should be removed in order to obtain a good penetrant test? a. Varnish b. Oxides c. Plating d. All of the above (answer) 2 – Which method is used to primarily to inspect small localized areas? a. Method A b. Method B c. Method C (answer) d. Method D 3 – Large defects can be hidden under a painted surface because: a. The paint will fill in the cracks and change the fluorescence of the penetrant b. Paint is more elastic than metal and will not fracture (answer) c. The penetrant will adhere to the … Continue reading ASNT Questions and answers for PT, LPI level II (2).

The ASME V is the guideline to make an NDE procedure, how to evaluate the report or defect is defined by Construction as below for your quick reference: 1. ANSI/ASME B31.1 Power Piping The following relevant indications are unacceptable: 1.1. Any cracks or linear indications. 1.2. Rounded indications with dimensions greater than 3/16 inch (4.8mm). 1.3. Four or more rounded indications in a line separated by 1/16 inch(1.6 mm) or less edge to edge. 1.4. Ten or more rounded indications in any 6 square inches (3,870 mm²) of surface with the major dimension of this area not to exceed 6 inches (150 mm) with the area taken in the most … Continue reading NDE Magnetic Testing (MPI) Standard and Criteria