During immersion ultrasonic testing of pipe or tubing, spurious echoes – McqOptions

MCQOPTIONS

1.	During immersion ultrasonic testing of pipe or tubing, spurious echoes may be caused by:
A.	Dirt on the test piece
B.	Grease on the test piece
C.	Air bubbles on the test piece
D.	All of the above
Answer» E.

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