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)

Related MCQs

• 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?
• Loss of the test piece back wall echo during scanning may be caused by:
• Compared to the echo returned from a smooth reflector, the echo returned from a natural flaw of the same area and orientation is:
• An ultrasonic test using a straight beam contact search unit is being conducted through the thickness of a flat part such as a plate. This test should detect:
• A 7.6 cm (3 inches) thick test specimen is radiographed with a source having size of 1.3 cm (1/2 inch), the film is placed in contact with the test specimen. The source to film distance is 40.6 cm (16 inches).The geometric unsharpness obtained is:
• An advantage of using a transducer with a large beam spread is:
• Which technique would most likely be used to examine a weld, with the weld cap still in place?
• A technique in which two transducers are used, one on each side of the test piece, is called:
• Strong signals which travel across the horizontal time base of an A scan presentation while the transducer is motionless on the test piece are probably:
• An ultrasonic testing technique in which the transducer element is not parallel to the test surface is called: