When variations are noticed in the front surface reflection, the test piece should be inspected for possible near surface discontinuities by:

Related MCQs

• When using a straight beam technique to examine a thick test piece what change(s) would you expect to see in back wall echo size as you approach the side of the test piece? (Transducer remains completely on test piece)
• A soft aluminium test piece is to be penetrant tested. The piece has previously been sand blasted to remove tightly adhering soils. What additional surface preparation should be performed?
• Which penetrant process is best suited to the detection of discontinuities in a test piece having threads and keyways?
• When using a post emulsifiable penetrant process, it is important to drain as much excess penetrant as possible from the surface of a test piece which has been immersed in the penetrant because:
• When performing a post emulsifiable penetrant test, the test piece does not rinse acceptable clean during normal processing. What should be done?
• When testing a test piece with parallel front and back surfaces, no back wall echo can be obtained. Which of the following actions might enable you to obtain a back wall echo?
• Fluorescent magnetic particle indications should be inspected under
• Fluorescent magnetic particle indications should be inspected under
• When the orientation of likely discontinuities is unknown, what is the minimum number of magnetising operations required to perform an adequate test?
• An inspection for surface and subsurface discontinuities in ferromagnetic welds would best be accomplished by which of the following techniques?