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:

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)
• In an A scan presentation, the horizontal base line represents the:
• An ultrasonic instrument control which is used to expand or contract the horizontal base line of an A scan display is called:
• A reaction which occurs when a radiation beam of 500 keV is partially absorbed by a test piece would probably be:
• A reaction which occurs when a radiation beam of 90 keV is totally absorbed by a test piece would probably be:
• A reaction which occurs when a radiation beam of 15 MeV is partially absorbed by a test piece would probably be:
• A reaction which occurs when a radiation beam of 50 keV is partially absorbed by a test piece would probably be:
• The density of the radiograph through the weld area is 3.2 while the density in the base metal is 2.9. This would probably indicate:
• 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?
• An oscilloscope display in which the screen base line is adjusted to represent the one way distance in a test piece is called a: